The impact of role models on entrepreneurial intentions and behavior: a review of the literature

Despite the presence of the term ‘entrepreneurial role model’ (ERM) in the discourse on entrepreneurship, existing empirical evidence on the effects of role models is rather limited. By investigating 86 published journal articles, we provide a structured overview of the academic research on role models’ effects on entrepreneurial intentions and behavior. We reveal that prior research focuses particularly on different types of role models (by whom), at which stage of life (when) and in which context the exposure to role models occurs. We use these research areas to structure our review. By expanding the understanding of the current state of ERM research, we reveal research gaps and provide future research recommendations. Our work could help policy makers and educators consider the different types of role models, the sociocultural context and the life cycle stage of the participants in structuring their entrepreneurship education programs.


Introduction
There is an extensive discussion among researchers and practitioners about why some individuals start their own business while others do not (e.g., Zapkau et al. 2017;Baron 2004;Shane and Venkataraman 2000). However, to date, no clear answer to this question exists. When asked why they started their own business, entrepreneurs often answer that 'others' significantly influenced their decision. These 'others' are usually entrepreneurs of different types and with different characteristics, such as renowned individuals, previous colleagues, or relatives. Such 1 3 people can be understood as role models (Bosma et al. 2012). There is a consensus among researchers that observing role models empowers individuals to discover and learn specific skills and gain the knowledge required to be an entrepreneur (Scherer et al. 1989b; Scott and Twomey 1988;Scherer et al. 1989a;Lent et al. 1994;Bosma et al. 2012). However, although prior studies acknowledge the significance of role models for potential entrepreneurs, there is no common understanding of the effect of role models on entrepreneurship, and research in this area is rather fragmented (Bosma et al. 2012;Van Auken et al. 2006). The purpose of our literature review is to provide a structured overview of previous research on role models in the entrepreneurship context. In particular, we focus on the research areas investigating different types of role models, in which context and at which stage of an individual's life are entrepreneurial intentions and behavior most affected. Our aim is to investigate these research areas by providing a systematic review of the literature. Thus, we took into account the fragmented characteristic of this field of investigation, which is based on various types of role models, outcome variables, methodologies and contexts.
Our study contributes to the role model and entrepreneurship literature in different ways and provides implications for policy makers and educators. First, our study contributes to the ERM literature by providing a structured overview of prior findings on ERMs (e.g., Scherer et al. 1989a;Van Auken et al. 2006;BarNir et al. 2011;Mungai and Velamuri 2011), identifying gaps and proposing future research directions. Second, we contribute to the entrepreneurship literature (e.g., Bosma et al. 2012;Carr and Sequeira 2007;Lindquist et al. 2015) by demonstrating that entrepreneurial intentions and behavior are affected by exposure to role models and that this effect depends on by whom, when and in which context this exposure occurs. Lastly, we contribute to the entrepreneurial education literature (e.g., Du Toit and Muofhe 2011;Walter and Block 2016;Souitaris et al. 2007;Nowiński and Haddoud 2019) by highlighting that the integration of role models in entrepreneurial education programs could foster entrepreneurial intentions and behavior (Block et al. 2013). Policy makers and educators can benefit from this structured knowledge of ERMs to effectively integrate role models in entrepreneurial education programs.
The present research systemically reviews 86 journal articles published from the topic's first emergence in 1988 to the end of March 2019. In the following section, we highlight the methods used to identify the studies included in our review. In Sect. 3, we present our categorization scheme and provide an overview of the ERM research area and the main effects of role models on entrepreneurship. These findings are summarized in Sect. 4, and future research areas are identified. Section 5 summarizes our study.

Methodology
Studies on role models' effects on entrepreneurship have noticeably increased over the past few years. However, research contexts and findings on ERMs are not homogenous, and the literature is fragmented. To analyze the literature on ERMs and to appropriately explore and structure our findings, we used a structured approach (Webster and Watson 2002). Based on recommendations by Fisch and Block (2018) and in line with best practices (Short 2009), we used Web of Science, Google Scholar, and related databases to identify studies on role model influences on entrepreneurship. First, we searched for the relevant publications by using the keywords 'entrepreneurial role model' and matching words such as 'parents ', 'peers', 'family', 'positive', 'gender', 'negative', 'successful', 'unsuccessful', 'entrepreneurial examples', 'nonfamily', 'mentors', 'teachers', 'educators', 'similar' 'intentions', 'behavior' and 'social learning' in their titles, keywords or abstracts. In a second step, we used backward and forward searches based on the articles' citations and reviewed these findings (Levy and Ellis 2006).
Overall, the search yielded 563 papers. 1 We decided to include only peer reviewed journal articles, as they are considered validated knowledge (Podsakoff et al. 2005). We did not specify or narrow down our research to higher-impact journals and included articles from all journals that met the selection criteria. However, we excluded books, book chapters, reports and conference papers due to missing or inconsistent peer review processes (Jones et al. 2011). We further limited our review to English-language journals, as they have an extensively higher impact factor than non-English journals . After following these steps, 189 articles remained in our sample. We read the abstracts of all 189 papers to ensure that the articles deal with the influence of role models on entrepreneurial intentions and behavior and their antecedents such as entrepreneurial attitudes (Robinson et al. 1991;Kolvereid 1996) and related constructs such as entrepreneurial interest (McClelland 1965;Schmitt-Rodermund 2004), entrepreneurial motivation (Segal et al. 2005;Shane et al. 2003) and entrepreneurial career preference (Scherer et al. 1989a). When in doubt about the exact contribution of a paper to our research question, we reviewed the entire paper. We identified several papers focusing on the effects of role models on entrepreneurial aspirations (Capelleras et al. 2019), entrepreneurial potential (e.g., Galloway and Kelly 2009;Krueger and Brazeal 1994), entrepreneurial fear of failure (Wyrwich et al. , 2018, entrepreneurial awareness and mindset (Robinson et al. 2016), and on self-efficacy (e.g., Dempsey and Jennings 2014). However, we decided to exclude these papers from our review, as the focus of our research is on entrepreneurial intentions and behavior. We also eliminated papers in which role models were not the main focus or the type of role model was undefined. During this process, an additional 103 papers were excluded.

Distribution of articles by year of publication
The distribution of articles included in this review by year of publication is shown in Fig. 1. This graph highlights that the number of publications investigating ERM effects in the context of entrepreneurial intentions and behavior has significantly increased over the years. Table 1 highlights the distribution of articles included in this review by journal. Articles related to role model effects in entrepreneurship are distributed across 56 journals. For the sake of clarity, we only included journals with more than one publication in our research area (ordered by number of articles published; journals that published the same number of articles are in alphabetical order). Of these, Entrepreneurship Theory and Practice covers 8.1% and Small Business Economics 6.9% of the total number of articles investigated. Table 1 provides a list of journals that published two or more articles on entrepreneurial role models during this time period.

Contextual distribution of the articles
In terms of geographic distribution, the majority of articles included research conducted in the U.S. and Spain. The other articles mostly investigated European countries (mainly Germany, Sweden and Austria). A few studies conducted their research in Australia, Asian countries, New Zealand and South Africa. Fifteen studies used multicountry data-particularly data from different European countries and the U.S.-with the goal of identifying cross-cultural differences.  1991  1993  1994  1995  1996  1998  1999  2000  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  Number of arƟcles Year of publicaƟon The impact of role models on entrepreneurial intentions and…

Dependent variables
We focused on papers using entrepreneurial intentions and behavior and included related constructs such as activities, attitudes, interest, motivation, career preference, entry, success, self-employment and new venture creation as outcome variables. The most commonly investigated dependent outcome is entrepreneurial intentions, which has been argued to be a strong predictor of actual behavior (Ajzen 1991). Forty-five papers focused on intentions, as they are often easier to measure than actual behavior (52%). The second most frequently examined outcome variable is behavioral outcomes (36%), which focus on such behavioral outcomes as entrepreneurial activity, entrepreneurial success, venture creation, self-employment transmission or selfemployment and entrepreneurship transmission. A small number of papers (12%) investigated entrepreneurial attitude (3 papers), interest (3 papers), career preference (3 papers) and motivation (1 paper), which can be understood as precursors of intention and are therefore included in our review. Figure 2 summarizes the dependent variables investigated.

Entrepreneurial role model research areas
Individual preferences to engage in a particular kind of behavior are constantly influenced by the ideas and behavior of others, their expressions of identity and their displayed images (Ajzen 1991;Akerlof and Kranton 2000). These influences also affect people's career choices (Krumboltz et al. 1976;Krueger Jr. et al. 2000;Douglas and Shepherd 2002). Researchers have argued that this behavior increases with the observational learning proficiency of the individual (Scott and Twomey 1988;Scherer et al. 1989b;Lent et al. 1994). Hackett and Betz (1981) find that by observing others, individuals learn how to make career decisions and act accordingly. This positive effect of observing others has also been found in the context of entrepreneurial intentions and behavior (e.g., Krueger Jr et al. 2000;Kuratko et al. 1997;Scherer et al. 1989a;Dalton and Holdaway 1989;Carroll and Mosakowski 1987;Scott and Twomey 1988;Bandura 1982). These 'others' can be understood as role models capable of influencing and shaping the behavior of the observer. More precisely, it has been argued that exposure to role models has a positive effect on entrepreneurial intentions by providing specific guidance and support or by creating an environment that triggers entrepreneurial behavior (BarNir et al. 2011).
In addition, it has been found that role models can influence both the outcome expectancy and self-efficacy of the individual, which can encourage following a specific career path, such as becoming an entrepreneur (Lent et al. 1994;Nauta et al. 1998). Zapkau et al. (2017) investigated how prior entrepreneurial exposure influences entrepreneurial behavior. To find answers to this research question, the authors examined the results of 69 quantitative-empirical papers and classified them into four categories: process, individual, environment and organization. The effect of entrepreneurial role models is only part of their research question. In contrast to this study, we focus on the question of the effects of ERMs on entrepreneurial intentions and behavior, as research findings on ERM effects are rather fragmented and no consensus among researchers exists. The aim of our systematic literature review is to illustrate a concept-centric (Fisch and Block 2018), comprehensive overview of the current knowledge in a structured manner. Figure 3 illustrates the framework we used to summarize the existing research on role models in entrepreneurship.
Research in the first research stream focuses on ERMs' existence in different contexts (26 papers, 30.2%). Papers in this group investigate three main areas: environment and culture, entrepreneurship programs and social context and stereotyping. The second research stream focuses on the types of role models (53 papers, 61.7%). In this category, articles investigate the effects of five different types of role models:  The impact of role models on entrepreneurial intentions and…

Fig. 3
Framework of the review family, similar models and peers, educators and mentors, successful versus unsuccessful models and unrelated models. The third category belongs to the stage of life where the exposure to role models occurred (when). In this research stream, articles focus on early role models in childhood and adolescence or they compare life cycle stages (7 papers, 8.1%). 2 The detailed distribution of articles classified by this framework is shown in Table 2.

Literature with a focus on the context (26 papers)
The entrepreneurial behavior of individuals is influenced not only by personal characteristics but also by the environment (Shane et al. 2003). Mitchell and Krumboltz (1984) propose that role models are an important contextual factor in building career intentions and making career choices. Role model literature focusing on contextual factors such as sociocultural aspects is concerned with the fact that the presence of entrepreneurs is one of the main factors promoting the creation of new ventures (Gnyawali and Fogel 1994;Bergmann and Sternberg 2007;Fornahl 2003;Sternberg 2009). A larger number of ERMs in a certain area can (unintentionally) inspire people to become entrepreneurs (Minniti 2005). More specifically, Dohse and Walter (2012) highlight that role models promote the transfer of explicit knowledge and provide 'know-how' and 'know-who' that influences entrepreneurial intentions. This influence can cultivate entrepreneurial intentions and encourage entrepreneurial actions because it provides access to information and resources and legitimizes entrepreneurial behavior (Davidsson and Wiklund 1997;Mueller 2006).
The majority of papers in this group focus solely on entrepreneurial intentions or their determinants (e.g., Toledano and Urbano 2008;Liñán and Chen 2009;Schmutzler et al. 2018;Dohse and Walter 2012). However, a few papers focus on such entrepreneurial behavior as entrepreneurial activities or venture creation (e.g., Noguera et al. 2013;Driga et al. 2009;Contín-Pilart and Larraza-Kintana 2015). The impact of role models on entrepreneurial intentions and… This research stream can be divided into three categories: 'environment and culture' 'entrepreneurship programs' and 'social context and stereotyping'.

Environment and culture (15 papers)
Entrepreneurial behavior is influenced at the microlevel by people's access to individual resources and personal characteristics (e.g., Bhagavatula et al. 2010;Davidsson and Honig 2003;Shane et al. 2003) but also at the macrolevel by the environmental factors and institutions that encompass it (e.g., Autio and Acs 2010;Terjesen and Hessels 2009;Vaillant and Lafuente 2007;Shane et al. 2003). Papers in this category focus on the environment and culture that influence and support individuals in their entrepreneurial aspirations. More specifically, these papers are concerned with the influence of ERMs on entrepreneurial activities at the country and regional levels .
De Clercq et al. (2013) examine the connection between people's access to resources and their probability of being self-employed. They highlight that the context of a country influences both human capital (i.e., knowledge, skills and experience) and social capital, such as exposure to entrepreneurial role models (Arenius and Minnit 2005), and their effect on entrepreneurial intentions. Individuals receive situational and individual cues from their environment and translate perceived opportunities into venture creation.
Prior research found that sociocultural factors have an important impact on entrepreneurial intentions (Cullen et al. 2014;Autio et al. 2013) and that they are one of the most consequential causes of entrepreneurial behavior (Arenius and Minniti 2005;Koellinger et al. 2007). Living close to successful entrepreneurs not only has a positive effect on the likelihood that people start their own business, but also creates an entrepreneurial culture that generates knowledge and local acknowledgment for the community (Andersson and Larsson 2014;Dohse and Walter 2012).
To summarize, if entrepreneurs and observers live within the same geographical area, this effect has been found to be more pronounced (Wyrwich et al. 2018). The literature has shown that the existence of entrepreneurs in a region accelerates the development of the area's venture creation (Andersson and Larsson 2014;Mueller 2006). It seems that the example of others 'who have made it' and their story has an inspiring effect and encourages others to create their own ventures. In addition, a high regional start-up enthusiasm appears to signal that a region is a suitable breeding ground for young ventures, which encourages potential entrepreneurs (Dohse and Walter 2012). This local atmosphere could facilitate entrepreneurial intentions, promote new entrepreneurial activities and help create an entrepreneurial network (Davidsson and Wiklund 1997;Mueller 2006).
The findings of the papers in this category explain some of the differences in entrepreneurial activity in different environments (e.g., Andersson and Larsson 2014;De Clercq et al. 2013;Dohse and Walter 2012;Schmutzler et al. 2018). Recommendations for public policy interventions are suggested by emphasizing the necessity to approve entrepreneurial surroundings to augment entrepreneurial behavior (Liñán et al. 2011). However, most of these studies depend on cross-sectional data that do not allow causality to be deduced or the common method bias to be eliminated (e.g., Lafuente et al. 2007;Driga et al. 2009;Contín-Pilart and Larraza-Kintana 2015). Table 3 summarizes the papers in this group.

3
The impact of role models on entrepreneurial intentions and… a A large number of papers used more than one dependent variable. We included only those variables that are within our research focus 1 3

Entrepreneurship programs (5 papers)
Papers in this group analyze the presence of role models in different entrepreneurial education programs and their influence on entrepreneurial attitudes and intentions. The existence of role models at universities has been shown to increase students' tendency to pursue entrepreneurial attitudes (Fellnhofer and Puumalainen 2017;Mueller 2011) or to choose entrepreneurship as a career (Du Toit and Muofhe 2011; Rahman and Day 2014). Research in this group not only emphasizes the positive effect of ERMs on the entrepreneurial attitudes and intentions of students but also on increasing the awareness of entrepreneurship. Toledano and Urbano (2008) show that the evolution of an entrepreneurial aptitude among students is profoundly dependent on the existence of ERMs. Thus, they demand that ERMs be included in educational programs and that the advantages of self-employment be emphasized. This demand is also highlighted by Scott and Twomey (1988), who show that by providing students with contacts to ERMs, they can be stimulated to pursue business opportunities. In line with this idea, Block et al. (2017) argue that new types of entrepreneurial education initiatives are necessary to boost entrepreneurial intentions. Hence, bringing successful entrepreneurs (role models) to university courses or stimulating communication with local entrepreneurs could have a significant influence on entrepreneurial behavior (Toledano and Urbano 2008;Mueller 2011). The results of ERM research in entrepreneurship programs are summarized in Table 4. (Forsman and Barth 2017;Cundiff et al. 2013); therefore, individuals tend to involve themselves in 'gender appropriate' careers (BarNir et al. 2011). In these contexts, not surprisingly, women have less interest in 'male-oriented' careers (Johnson et al. 2008;Forsman and Barth 2017). Entrepreneurship has been argued to be a male-dominated area, which offers more chances for men (Ahl and Marlow 2012;Marlow 2002), and women experience more barriers, such as receiving financial support, to starting their own business (Akehurst et al. 2012). Although research shows these barriers to be different across countries (Engle et al. 2011), overall it has been found that women seem to have lower entrepreneurial intentions (Santos et al. 2016;Shinnar et al. 2012;Hundt and Sternberg 2016;Joensuu-Salo et al. 2015). Consequently, several scholars have argued that women have fewer entrepreneurial role models and less social support to become entrepreneurs than their male counterparts (Noguera et al. 2013;Dyer and Handler 1994). These studies suggest that providing women with early-age entrepreneurship education is the key to increasing their entrepreneurial intentions and to reducing the negative effects of stereotyping (Entrialgo and Iglesias 2018). To stimulate the entrepreneurial intentions and behavior of young women, Kickul et al. (2008) propose including female role models in women's educational environment (e.g., as guest speakers). In line with this idea, more female role models for women are needed to promote women's self-employment (Karimi et al. 2014;Noguera et al. 2013;Karimi et al. 2013). Prior research on social context and stereotyping is summarized in Table 5. The impact of role models on entrepreneurial intentions and…

Literature with a focus on the types of role models (by whom) (53 papers)
Previous research has identified different types of role models (e.g., Chlosta et al. 2012;Chen et al. 2016;Austin and Nauta 2016;Falck et al. 2012) and shown that exposure to them reduces the ambiguity and concerns associated with entrepreneurship (Minniti 2005). Consequently, it is argued that not only the existence of role models is consequential but also the achievements of an entrepreneurial career conveyed by those role models (Davidsson 1995;Scherer et al. 1989a). For example, several findings emphasize that exposure to a successful ERM has a favorable impact on entrepreneurial behavior (e.g., Boissin et al. 2011;Boyd and Vozikis 1994;Brunel et al. 2017). This exposure has been argued to increase entrepreneurial intentions to start new businesses by facilitating information concerning attainable opportunities, by providing particular guidance and help, or by creating encouraging surroundings that foster entrepreneurial outcomes (BarNir et al. 2011). Prior literature has identified different types of role models and exposure to them, arguing that this exposure is positively related to entrepreneurial behavior. Most of the research in this group focuses on entrepreneurial intentions (e.g., Bosma et al. 2012;Geldhof et al. 2014;Laspita et al. 2012) and its antecedent entrepreneurial attitude (Fellnhofer 2017a(Fellnhofer , 2018 and related constructs, such as entrepreneurial interest (Matthews and Moser 1996;Wang and Wong 2004) and entrepreneurial career preference (Scherer et al. 1989a(Scherer et al. , 1991a. Only a small number of papers analyzed the impact on behavioral outcomes such as self-employment (Chlosta et al. 2012;Hoffmann et al. 2015) or venture creation activities (Hickie 2011). We identified 53 papers in total with a focus on the type of role model. Papers in this research stream can be divided into five subcategories: 'Family', 'similar models and peers', 'educators and mentors', 'successful versus unsuccessful models' and 'unrelated models'.

Family (30 papers)
Parents are early role models for children in acquiring social values, habits and attitudes (Scherer et al. 1991b) and can act as negative or positive models for entrepreneurship (Morales-Alonso et al. 2016;Pablo-Lerchundi et al. 2015). Prior research suggests that having entrepreneurial parents affects the likelihood of entrepreneurial intentions (e.g., Geldhof et al. 2014;Chlosta et al. 2012;Wang and Wong 2004;Laspita et al. 2012;Saeed et al. 2014;Criaco et al. 2017;Andersson and Hammarstedt 2011;Niittykangas and Tervo 2005;Zapkau et al. 2015). Hickie (2011) finds that entrepreneurial parents can constitute an advantage in developing relevant human capital but can also provide access to the values, knowledge and support of someone with experience. In addition, the presence of a parental entrepreneurial role model has been found to be associated with higher education and training ambitions, task self-efficacy, and an inclination toward entrepreneurial careers (Scherer et al. 1989b). This impact is independent of the parents' existing social and economic conditions (Wyrwich 2015). Moreover, Mungai and Velamuri (2011) emphasize that parental impact is more prominent when the child is a young adult (18-21 years) compared to adolescence (12-17 years) or childhood (8-11 years). Furthermore, it has been revealed that individuals who take over businesses from their parents typically do engage in this transition at the beginning of their career (Blumberg and Pfann 2016).
In sum, researchers agree that self-employed parents strongly influence their children as ERMs, but it is not yet clear which factors moderate the link between parental entrepreneurship and their offspring's entrepreneurial intentions (e.g., Geldhof et al. 2014;Schröder et al. 2011). Table 6 summarizes the research in this subcategory.

Similar models and peers (9 papers)
It has been found that opportunity recognition is enhanced by the perceived similarity between the individual and the ERM in terms of personal characteristics, skills, age, gender, and field of expertise (Wheeler et al. 2005;Wohlford et al. 2004), as well as values and ambitions (Filstad 2004). The observer is more likely to show imitative behavior when the perceived similarity is considerably high (Wilson et al. 2009;Scott 2009). According to Bosma et al. (2012), entrepreneurs and their role models have a propensity to imitate each other in relation to characteristics and attributes that simplify role identification, i.e., gender, sector and nationality. Following this line of reasoning, Bandura and Walters (1977), Bandura (1986) suggests that learning experiences are probably associated with escalating factors that affect the decision to start a business because of similarities between a role model and an observer in terms of specific characteristics such as gender. In line with this idea, Heckert et al. (2002) demonstrate that individuals are more likely to predicate their career prospects on information supplied from people with the same gender or the same ethnicity . Consequently, previous studies showed the father as being the most influential role model for male offspring and the mother as being the most important role model for female offspring (Hoffmann et al. 2015;Lindquist et al. 2015). However, some researchers found that having a same-sex entrepreneurial role model is not inevitably associated with having stronger entrepreneurial intentions (Austin and Nauta 2016) and that sometimes women are even more likely to choose male role models (Wohlford et al. 2004). Considering the different research designs, methodologies and the contexts in which those studies have been conducted can provide some explanations for these mixed results.
On the other hand, since entrepreneurial behavior results from an individual's socialization process, peers can have a strong influence on the entrepreneurial intentions of an individual (Falck et al. 2012;Kacperczyk 2013). Our review of the literature showed that researchers discuss two different kinds of peers in particular: school peers and coworkers. It has been found that employees are more likely to become self-employed if a colleague had previous self-employment experiences (Nanda and Sørensen 2010). Individuals learn from 'established colleagues' as 'multiple contingent role models' in organizational socialization processes (Filstad 2004). Furthermore, it has been shown that self-employment is an approved career possibility. Therefore, an individual's fear of entrepreneurial failure diminishes when observing the role model . Based on these findings, it has been argued that innovative behavior among employees can be transferred by training that motivates innovative behavior among their colleagues by performing as ERMs (Miao et al. 2018) and by creating an entrepreneurial culture (Huyghe and Knockaert 2015). The second identified peer group in this setting is school peers (Falck et al.

3
The impact of role models on entrepreneurial intentions and… Table 6 Family  The impact of role models on entrepreneurial intentions and… . Although prior research stresses the importance of early childhood experiences on cognitive and noncognitive capabilities (Heckman 2006;Cunha and Heckman 2007), only one paper investigates this relationship and discovers that having an entrepreneurial peer group at an early age (15 years old) can have a positive influence on an individual's entrepreneurial intention (Falck et al. 2012). Table 7 summarizes the research in this subcategory.

Educators and mentors (2 papers)
The two papers in this group investigate the effect and role of educators and mentors in entrepreneurship education programs (Diegoli and Gutierrez 2018;Eesley and Wang 2017). Diegoli and Gutierrez (2018) examined the effect of an educator with previous entrepreneurial involvement. The authors find that when the educator has entrepreneurial experience, he has a greater impact on a specific group of students' entrepreneurial intentions (i.e., students with converging learning styles). However, they conclude that it is impossible to determine if an educator's specific characteristic or experience affects students' entrepreneurial intentions; hence, students' individual needs should be considered. The second paper in this group (Eesley and Wang 2017) is a recent randomized field experiment that investigates the impact of mentors (entrepreneurs and nonentrepreneurs) on entrepreneurial behavior. Their results show that although entrepreneurial mentors had greater social influence compared to nonentrepreneurs, these mentors had an even greater impact on students with no family-related entrepreneurial history. They argue that having an entrepreneurial parent or peers with entrepreneurial experience is not possible for everyone, but that educational programs can foster entrepreneurial development by creating connections between individuals and entrepreneurial mentors. Table 8 summarizes the research in this subcategory.

Successful versus unsuccessful models (7 papers)
The literature has identified that successful and failed entrepreneurs are related to entrepreneurial intentions and emphasizes that individuals' impression of their role model's entrepreneurial outcomes should be observed (Boissin et al. 2011). It has been demonstrated that although successful role models create a higher perceived entrepreneurial feasibility (Krueger and Brazeal 1994) and that observing failed models can increase fear of failure (Boissin et al. 2011), exposure to unsuccessful entrepreneurs nevertheless increases entrepreneurial intentions (Chen et al. 2016). However, Scherer et al. (1989a) argue that people with 'low-performing' role models show entrepreneurial interest, but argue that their self-efficacy is lower than that of individuals exposed to 'high-performing' role models. In other words, individuals with successful role models enjoy a greater amount of self-efficacy (Boyd and Vozikis 1994) and have lower fear of failure (Wyrwich et al. 2018) due to their role models. Gibson (2004) and Buunk and Gibson (2007) found that making 'upward or downward comparisons' with different types of role models has positive effects on entrepreneurial intentions (Brunel et al. 2017). In line with social comparison theory, they find that individuals usually make an 'upward comparison' with the model and believe they will be at least as successful as the model they observed. They find that exposure to either failed or successful entrepreneurs has a positive The impact of role models on entrepreneurial intentions and… impact on individuals' entrepreneurial intention (Brunel et al. 2017). Additionally, it is assumed that exposure to negative or 'low-performing' models creates a practical and rational view for observers and helps them to learn from the mistakes of others (Scherer et al. 1989a). Consequently, it is suggested that despite the usefulness of both successful and failed models in entrepreneurship education (Schwarz et al. 2009;Brunel et al. 2017), arranging exposure to successful entrepreneurs at early ages (elementary or secondary schools) is likely to increase entrepreneurial intentions, particularly in those groups of children without entrepreneurial parents (Scherer et al. 1989b). Table 9 summarizes the research in this subcategory.

Unrelated models (5 papers)
Few papers thus far have examined the effect of unrelated role models on entrepreneurial intentions and behavior. One type of 'unrelated role model' can be found through narratives and storytelling about entrepreneurship. Fellnhofer (2017a) argues that although there has been a discussion among researchers about entrepreneurship education and its effects, the nondeniable effect of the opportunities provided by multimedia storytelling and narratives has been completely ignored. In this regard, the author conducted a quasi-experiment to compare the effects of real company cases with videos (Fellnhofer 2018). Results highlight that entrepreneurial feasibility is higher for groups who watched videos. In addition, Laviolette et al. (2012) show that observing a fictional role model-'entrepreneurs' testimonials and narratives'-positively influences entrepreneurial self-efficacy and intentions. They find that as long as role models provide the possibility for an individual to identify with them, they can stimulate a positive attitude toward entrepreneurship and increase entrepreneurial activities. They demonstrate that narratives positively affect attitudes toward entrepreneurship and individuals' entrepreneurial self-efficacy and intentions. Moreover, the authors find that stories about successful fictional role models had greater effects compared to stories of unsuccessful 'real-life' role models. Therefore, it has been suggested that telling stories about entrepreneurs be used in entrepreneurship education programs to influence entrepreneurial intentions (Fellnhofer 2017b;Laviolette et al. 2012). In this respect, Radu and Loué (2008) suggest that using social media could create a greater impact if it exposes young generations to more similar idealistic (and realistic) role models instead of heroic role models that could fulfill social and/or family requirements. They find that if the narrative entrepreneur is more realistic, the observer will be more involved and consequently the effects are greater. Table 10 summarizes research in this subcategory.

Literature with a focus on the stage of life of the exposure (when) (7 papers)
Although there has been significant research on ERMs and their positive impact on entrepreneurial intentions and behavior, previous studies have largely ignored the evaluation of role models' impacts on different stages of an individual's life to determine whether these effects are stronger at certain ages (Mungai and Velamuri 2011).
A large number of studies conclude that having entrepreneurial parents creates a greater chance of choosing an entrepreneurial career (e.g., Criaco et al. 2017;Kennedy et al. 2003;Scherer et al. 1991a, b;Scott and Twomey 1988). However, most of these studies examine the effects of parental role models in adulthood while at  The impact of role models on entrepreneurial intentions and… university (e.g., Díaz-García and Jiménez-Moreno 2010; Pruett et al. 2009;Pablo-Lerchundi et al. 2015;Dohse and Walter 2012). This research approach does not allow differentiating at which life stages the effects of the role models were particularly formative. Only a few papers investigate role models' effects in early ages during adolescence (e.g., Obschonka et al. 2011;Rosique-Blasco et al. 2016) or differentiate between stages of life (Lafuente and Vaillant 2013). Considering the differences among role model influences over different age ranges (Lafuente and Vaillant 2013), we categorized papers in this group into childhood and adolescence and comparison of life cycle stages.

Childhood and adolescence (5 papers)
Only a small number of papers identified the impact of ERMs at early ages (e.g., Obschonka et al. 2011;Rosique-Blasco et al. 2016). Two of these papers evaluate role model effects on adolescents from 14 to 15 years old (Obschonka et al. 2011;Rosique-Blasco et al. 2016) and one examines the impact of entrepreneurial parents on late adolescents averaging 18 years of age (Schröder et al. 2011). All three studies find a significant influence of role models on career choice intentions or entrepreneurial success. The other two studies in this subcategory use longitudinal data and investigate ERMs' effects on entrepreneurial behavior (Sørensen 2007;Schoon and Duckworth 2012). Schoon and Duckworth (2012) show that having an entrepreneurial father had the greatest effect on male offspring, but for females, parents' socioeconomic status had the greatest impact. In line with this finding, Sørensen (2007) shows that although ERMs had a significant influence on both male and female offspring, the effect was greater for males. Moreover, they conclude that having entrepreneurial parents during adolescence can positively shape an offspring's inclination toward entrepreneurship. Considering the importance of having an entrepreneurial role model in general (Bosma et al. 2012) and during early ages in particular (Rosique-Blasco et al. 2016), it is suggested that entrepreneurial career intentions can be promoted by observing entrepreneurs during childhood and adolescence. In this regard, early entrepreneurship education programs could be a potential 'seedbed' for using ERMs to develop early entrepreneurial career intentions. Table 11 summarizes the research in this subcategory.

Comparison of life cycle stages (2 papers)
Most of the research on ERMs focuses on either their impact in various contexts or on the different types of role models but does not differentiate among the effects of role models across different life stages (Mungai and Velamuri 2011). Only two papers investigate this research question. Lafuente and Vaillant (2013) examine role models' effects on entrepreneurial behavior at different stages of an individuals' life (18-45 years old) and find that entrepreneurial role models had greater effects on younger adults and the smallest effect on older individuals (Lafuente and Vaillant 2013). The second paper, by Mungai and Velamuri (2011), examines role models' impact during three different stages of life (late childhood, adolescence and young adulthood). Young adulthood in this research was defined as being between 18 and 21 years. The authors find that the effect of ERMs is greater when the observer is a young adult. Since there are only The impact of role models on entrepreneurial intentions and…

Summary, open research questions and limitations
In this study, we conducted a systematic review of the current literature on role model effects in an entrepreneurship context. We developed a framework for categorizing the various research topics of the 86 papers on ERMs investigated in our study. We differentiate among three main research streams: in which context/where, by whom and when the exposure to ERMs occurs. The first category, in which context/where, can be subdivided into research on environment and culture, entrepreneurship programs, and social context and stereotyping. Prior research investigating different types of ERMs (by whom) and their different impact on entrepreneurial intentions and behavior can be divided into research about family, similar role models and peers, educators and mentors, successful versus unsuccessful role models and unrelated models. The third research stream is focused on the stage of life at which exposure to ERMs occurs (when) and can be categorized in two groups: childhood and adolescence and comparison of life cycle stages. Our review highlights that ERMs' emergence and their effects vary among different environments. Regions with a high degree of entrepreneurial activities create more ERMs and consequently further increase entrepreneurial activity. Observing others increases the feasibility of starting a business and motivates more people to do so. In addition, prior research suggests that entrepreneurship programs are important for entrepreneurial intentions and behavior. Furthermore, it has been shown that social context and stereotyping have a significant effect on entrepreneurial activity.
Furthermore, we shed light on the different types of ERMs and their role as an important influencing factor in starting a business. Prior research suggests that the type of role model (by whom) has various effects on observers' entrepreneurial intentions and behavior. In addition, the relationship between the ERM and the individual affects the attitude toward entrepreneurship. In particular, the type of role model (i.e., similar models and peers, as well as their success) can have a significant influence on an individual's entrepreneurial intention and behavior.
Altogether, the results of our literature review reveal that it matters in which context, by whom, how and when the exposure to role models occurs. Based on these findings, we identify different research gaps and propose ideas for future research.

Research questions focusing on the context/where
• Does exposure to ERMs have different effects in various cultural contexts?
How does this affect entrepreneurial intentions and behavior?
1 3 The impact of role models on entrepreneurial intentions and… Research on the effects of ERMs on individuals in different cultural environments remains scarce. This is, however, an important research area Engle et al. 2011;Reavley and Lituchy 2008) because culture comprises mutual values, beliefs, and anticipated behaviors (Hofstede 1980). It also includes comparable patterns of thoughts, feelings and activities (Hofstede et al. 2005). Consequently, the behavior of individuals is affected by their cultural values and social norms. This effect is also true in terms of entrepreneurial behavior (Krueger et al. 2013). For example, research examining women entrepreneurs in different cultures highlights that women's social status varies significantly among cultures (Reavley and Lituchy 2008;Ramadani et al. 2013;Lee 1996), which directly affects their intention to start a business (Schoon and Duckworth 2012).
We propose to intensify future research in two ways. First, we suggest investigating the effect of ERMs in different countries with different sociocultural systems and, second, investigating the effect of ERMs on entrepreneurial intentions and behaviors in these different environments. Answering these research questions can help better understand how ERMs work in different countries with different sociocultural systems. Furthermore, knowledge about this relationship can also provide a better understanding of how ERMs affect individuals with different cultural backgrounds.

• Does exposure to ERMs have different effects in various social contexts with different stereotypes? How do stereotypes affect entrepreneurial intentions and behavior?
Gender stereotypes are individuals' common knowledge and perceptions, which are identified as being aspects and characteristics of each gender (Powell and Graves 2003). Previous studies reveal that social context and stereotypes affect individuals' occupational choice (Johnson et al. 2008). Moreover, stereotypes have greater effects on female entrepreneurial career intentions (Engle et al. 2011). BarNir et al. (2011) found that role models affect female entrepreneurial self-efficacy more than they affect male entrepreneurial self-efficacy.
Individuals socialize and are affected by stereotypes in their culture (Gupta et al. 2009). Entrepreneurship is known as a male-dominated area and critical challenges have been identified for women (Hamilton 2013;Ogbor 2000). Women's behavior is closely linked to their surrounding institutions and to women's position in society (e.g., BarNir et al. 2011;Díaz-García and Jiménez-Moreno 2010;Koellinger et al. 2013;Minniti and Nardone 2007). Thus, the presence of role models can possibly abate gender stereotypes (Fagenson and Marcus 1991;Rivera et al. 2007). Hence, future research could investigate which social stereotypes affect entrepreneurial intentions and behavior, and how they do so. Moreover, one could examine how these stereotypes affect the relationship between ERMs and entrepreneurial intentions and behavior in different contexts.
The impact of role models on entrepreneurial intentions and…

Research questions focusing on types of role models (by whom) • How does the entrepreneurial orientation of ERMs affect individuals' entrepreneurial intentions and behavior?
From the literature, we know that there are various types of ERMs (e.g., Bosma et al. 2012;Laviolette et al. 2012;Boissin et al. 2011) and that these different types of role models affect entrepreneurial intentions and behavior differently (e.g., Schoon and Duckworth 2012;Eesley and Wang 2017;Nanda and Sørensen 2010).
However, prior studies do not allow us to draw clear conclusions regarding the question of which types of ERMs have the strongest effect on entrepreneurial intentions and behavior (Davidsson 1995;Scherer et al. 1989a). In particular, they do not take the entrepreneurial orientation of the ERMs into account. Hence, it would be very revealing to investigate whether ERMs with different entrepreneurial orientations have different effects on entrepreneurial intentions and behavior. For example, it would be interesting to investigate whether individuals react differently to social or profit-oriented ERMs.

between individuals and their role models affect entrepreneurial intentions and behavior? Do children and adolescents react differently than do adults to similar role models?
Previous studies show that role models are more effective when individuals and role models share the same gender or racial group (e.g., Marx et al. 2009;Lockwood 2006;Marx and Goff 2005). This finding is explained by the fact that similar role models inspire the belief that individuals can overcome uncertainties and risks associated with a specific task Lockwood and Kunda 1997). For example, prior research suggests that direct exposure to female ERMs can strengthen the entrepreneurial self-efficacy of women (Dempsey and Jennings 2014). Hence, a deeper knowledge of the similarity effect of ERMs can help identify fitting role models and integrate this knowledge into entrepreneurship programs, such as mentoring and coaching, to facilitate entrepreneurial intentions and behavior. Furthermore, it would be interesting to see if this effect depends on the individual's age.
• What are ERMs' effects on the individuals' actual entrepreneurial behavior?
Our literature review reveals that past studies mainly used cross-sectional research designs (e.g., Lafuente et al. 2007; Díaz-García and Jiménez-Moreno 2010; Karimi et al. 2014;Lafuente and Vaillant 2013;Criaco et al. 2017;Laspita et al. 2012). Although this design fits the datasets and surveys used, it does not allow to assess longer-term effects and actual entrepreneurial behavior (e.g., Fellnhofer 2018; Huyghe and Knockaert 2015;Laviolette et al. 2012;Du Toit and Muofhe 2011). Longitudinal data could help close this gap and not only measure entrepreneurial intentions but also investigate actual behavior (Davidsson and Honig 2003;Karimi et al. 2014).

Research questions focusing on when the exposure occurs
• How can exposure to ERMs in entrepreneurship programs for children and adolescents affect their entrepreneurial attitude?
Prior research has found that the integration of role models into educational programs has a positive effect on entrepreneurial career intentions (Scott and Twomey 1988) and that this effect is even stronger in unfavorable environments (Walter and Block 2016) such as those with a bureaucratic legal system (Lim et al. 2010) or low property rights (McMullen et al. 2008). However, our literature review reveals that there is, to the best of our knowledge, no research on ERMs' effects on entrepreneurial attitudes and intentions in early entrepreneurship education (primary and secondary schools). Most studies tend to focus on adults (Fellnhofer and Puumalainen 2017) in higher education, such as university students (e.g., Du Toit and Muofhe 2011;Mueller 2011;Toledano and Urbano 2008;Rahman and Day 2014). None of the studies investigate younger ages, even though the importance of early childhood programs to adult behavior has been acknowledged in many disciplines, such as research on labor markets (e.g., Heckman et al. 2013), cognitive and social development (Camilli et al. 2010) and career choice intentions (Schröder et al. 2011). However, Obschonka et al. (2011) provide the first insights into this relationship in the entrepreneurship context and argue that childhood and adolescent experiences are important for later venture creation. Hence, future research focusing on early entrepreneurship education could improve our understanding of these interdependencies.

Limitations
The results from our review must be considered in light of some limitations. Despite our extensive efforts, the literature search may not have captured all research related to role models and entrepreneurship. First, our in-depth content analysis was based on a keyword search and is therefore limited by the search keywords we selected. To decrease this risk, we expanded our search to keywords used in the articles that we identified and conducted a backward search. Second, we only focused on peerreviewed articles and ignored, for example, book chapters. Third, our review is limited to articles published in English. Although this procedure is accepted practice, it should be noted that non-English articles were excluded from our literature search.

Conclusion
We conducted a systematic review of the literature investigating the effects of ERMs on entrepreneurial intentions and behavior. Our research was motivated by the fact that although numerous studies have investigated the efficacy of ERMs, their findings are ambiguous and the literature is rather fragmented. Our aim was to structure the existing research, identify research gaps and identify areas for future research. Altogether, our study contributes to the entrepreneurship and ERM literature in various ways. First, we provide a framework and categorize the 86 publications focusing on ERMs and their effect on entrepreneurial intentions and behavior that were identified since the first publications appeared in 1988 until the end of March 2019. We identify three main research streams, differentiating among in which context, by whom and at which stage of life the exposure to role models occurs. The context (where) can be divided into 3 subcategories: 'environment and culture ', 'entrepreneurship programs' and 'social context and stereotyping'. The research on different types of role models (by whom) comprises papers focusing on family, similar models and peers, educators and mentors, successful versus unsuccessful models and unrelated models. The third research stream focuses on the stage of life at which the exposure to the ERM occurs. In this group, papers are categorized in two groups: childhood and adolescence and comparison of life cycle stages.
Our approach enabled us to identify research gaps in current ERM research. Based on these gaps, we provide future research questions that can help increase our understanding of the effects of ERMs on entrepreneurial intentions and behavior.
Second, our findings contribute to the entrepreneurship literature by demonstrating that entrepreneurial intentions and behavior are affected by exposure to role models. In particular, we find that this effect depends on by whom, when and in which context the exposure to role models occurs.
Third, by highlighting that the integration of role models in entrepreneurial education programs, particularly at early ages, could increase entrepreneurial intentions and behavior, we also contribute to the discussion of entrepreneurial education. We provide evidence from prior research showing that implementing suitable role models in entrepreneurship programs can help foster entrepreneurial activities. This knowledge is particularly relevant for policy makers and educators fostering entrepreneurial education programs, as it provides ideas about how to structure these programs and how to include ERMs effectively. In particular, policy makers and educators should consider aspects such as the stage of life, gender, peer groups, and prior experience or individual contexts while structuring and implementing entrepreneurship programs and initiatives.