Abstract
The assumption of stable non-cognitive skills is important in the economic literature. This paper proposes to test this assumption by investigating whether a specific non-cognitive skill, locus of control, is stable after the occurrence of a health-related event, namely a hospital stay. To do so, we use a representative and longitudinal dataset of individuals living in Germany (SOEP). Our results show that mean-level changes in locus of control are, on average, small. In addition, we report evidence that length and frequency of hospital stays have only little influence on locus of control. Young adult women (i.e., aged 18–35 years old) and old men (i.e., aged 66 years and more) experience, however, larger locus of control change. Empirical studies analyzing the impact of locus of control for these subgroups might, therefore, rely on a locus of control measurement prior to the desired outcome to limit reverse causality or simultaneity bias.
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Notes
Non-cognitive skills describe the personal attributes not thought to be measured by IQ or achievement tests. These attributes go by many names in the economic literature including soft-skills, personality, character skills or socio-emotional skills. We follow Cobb-Clark and Schurer (2013) and Kautz et al. (2014) by considering, throughout the paper, locus of control as a non-cognitive skill.
LoC captures beliefs that are distinct, but complementary to risk, time and social preferences (Becker et al. (2011)).
In addition, hospital stays affect a sizeable part (around 20%) of the German population every year (Schmidt et al. 2004).
We investigate whether LoC is related to sample attrition. To do so, we regress the individuals’ LoC on the number of waves he or she is observed in the dataset. We find a positive relationship between individuals with an internal LoC and the number of waves, indicating that these individuals are less likely to leave the sample. Note that this procedure is similar as the one investigating by Cobb-Clark et al. (2014). We find similar a result using a Probit modeling the probability of being out of the estimation sample.
We also run a Cronbach’s alpha test to provide additional reliability of the LoC questions. We find a Cronbach’s alpha of 0.60 for the whole set of questions and 0.65 when question 4 is dropped. The other studies relying on the LoC in the SOEP data find the exact same value (Preuss and Hennecke 2018) or a very similar one (0.62 in Heineck and Anger 2010).
We also conduct a similar factor analysis for the whole sample of SOEP respondents. We find that the 10 questions load onto the two same factors. This indicates that our distinction between internal and external control tendency is not specific to the estimation sample, but rather seems to be representative of the German population. These results are available on request.
The average hourly wage is obtained by dividing individual labor earnings from main job by the number of annual hours worked (Steiner 2017). It equals 15,18 euros for the whole estimation sample and 13,28 euros for the women estimation sample (these findings are consistent with the average hourly wage provided by the German bureau of statistics).
We do not report results on LoC change for men, as there are only significant for those aged 66 years and more. In such an age category, men are more likely to be retired than earning wage on the labor market.
We are not able to control for other events that might impact both the perception of control and hospital stays.
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I give special thanks to Yves Arrighi, Andrew Clark, Brigitte Dormont, Matteo Galizzi, Daniel Herrera, Hélène Huber, Andrew Jones, Fabrice Le Lec, Nicolas Sirven, Lea Toulemon, Setti Rais, Lise Rochaix, Xavier Rousset, Brendan Vannier, and Marjon Van der Pol. I also thank all participants of the \(2{nd}\) LIRAES’s doctoral day, of the \(12{\text{th}}\) doctorissime day, of the Work in Progress Seminar of Paris School of Economics, and of the \(40{\text{th}}\) Days of French Health Economists. I would like to thank the two anonymous reviewers for their many insightful comments and suggestions.
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Marsaudon, A. Do Hospital Stays Modify Locus of Control?. De Economist 170, 257–277 (2022). https://doi.org/10.1007/s10645-022-09404-w
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DOI: https://doi.org/10.1007/s10645-022-09404-w