Abstract
In recent decades, the competitive landscape in many markets (e.g., retailing) and the methods that researchers use to analyze these markets have changed heavily. This has resulted in updates of empirical generalizations in many areas. For cross-price elasticities, however, this update is pending. Hence, it is unclear how these changes have affected cross-price elasticities, a key measure of competitive interaction. To address this void, we conduct a meta-analysis of prior econometric estimates and consider a broad set of determinants that have not been analyzed before in the context of cross-price elasticities. Using 7,264 estimates from 115 studies, we identify six new main empirical generalizations. (1) The mean cross-price elasticity is .26 (median =.10), which is half the magnitude of the previous meta-analytic mean. (2) Cross-price elasticities have decreased over time, and (3) they decrease over the product life cycle. (4) High-stockpiling groceries have the highest cross-price elasticities. (5) Long-term cross-price elasticities are larger than short-term cross-price elasticities. (6) The asymmetric share effect only holds in high-share tiers. We derive implications based on these empirical generalizations.
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Notes
We use the term price changing brand to refer to the brand that changes its price (Horváth and Fok 2013 use the term “attacker brand”), and we refer to the brand that is affected by the rival’s price change as the demand changing brand (Horváth and Fok 2013 use the term “victim brand”). We opted for this more generic terminology because it encompasses both price increases as well as decreases of the price-changing brand, whereas attacker/victim tend to imply a competitive attack through a price reduction.
We use the abbreviation CPE to refer to cross-price elasticities, and ACPE to refer to the absolute cross-price effect, which we will formally define below.
We used the following keywords: cross price elasticity, cross price elasticities, cross price effect, cross price effects, cross-price.
The majority of papers that we obtained from SSRN are working papers that are later published in a journal that we cover. We were able to identify 1 otherwise unpublished working paper.
We analyze both cross-price elasticities between different brands and elasticities between SKUs of the same brand. As the majority of our elasticities is derived from competition between brands, we subsequently use the term brand elasticity.
In addition, we collected information on distribution, data source, and estimation method. These variables, however, caused collinearity problems in the estimation (high correlations and high variance inflation factors in auxiliary OLS regressions; Köhler et al. 2017). We therefore omitted these variables from further consideration.
We cannot exactly replicate their results because their analysis does not only rely on published studies but also includes additional, non-public data.
Constrained elasticities derived from, e.g., multinomial logit models are by construction not independent from each other. Therefore, we assessed the effect of the category mean own price elasticity and not the effect of the focal brand’s own price elasticity.
A 1% price change of a brand in a high price tier is larger in terms of dollars compared to a 1% change in a low price tier. This difference in dollars itself can lead to higher cross-price effects (Sethuraman et al. 1999).
We analyzed the variable Relative Price only as a moderating and not as a direct effect to make the results comparable to the findings by Sethuraman et al. (1999).
The “direct effect” in rows 1 and 2 of Table 5 is—because of the presence of the interaction—the effect of the base level of the market share tier, which is the low market share tier.
If we change the base of the interaction, the “direct effect” of Asymmetric Share (in high market share tier) is significant.
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Acknowledgements
The authors thank Harald van Heerde and participants at the 2016 ISMS Marketing Science Conference in Shanghai, and participants at the 2017 Annual Conference of the European Marketing Academy in Groningen for valuable comments. The authors gratefully acknowledge the helpful and constructive input by the editors, the AE and two anonymous reviewers.
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Auer, J., Papies, D. Cross-price elasticities and their determinants: a meta-analysis and new empirical generalizations. J. of the Acad. Mark. Sci. 48, 584–605 (2020). https://doi.org/10.1007/s11747-019-00642-0
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DOI: https://doi.org/10.1007/s11747-019-00642-0