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http://ssrn.com/abstract=1946447
 
 

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Competing Retailers and Inventory: An Empirical Investigation of General Motors' Dealerships in Isolated U.S. Markets


Marcelo Olivares


Columbia University - Columbia Business School - Decision Risk and Operations; University of Chile - Departamento de Ingenieria Industrial

Gerard Cachon


University of Pennsylvania - Operations & Information Management Department

September 10, 2009

Management Science, Vol. 55, No. 9, pp. 1586-1604, 2009
Columbia Business School Research Paper

Abstract:     
We study the following question: How does competition influence the inventory holdings of General Motors' dealerships operating in isolated U.S. markets? We wish to disentangle two mechanisms by which local competition influences a dealer's inventory: (1) the entry or exit of a competitor can change a retailer's demand (a sales effect); and (2) the entry or exit of a competitor can change the amount of buffer stock a retailer holds, which influences the probability that a consumer finds a desired product in stock (a service-level effect). Theory is clear on the sales effect—an increase in sales leads to an increase in inventory (albeit a less than proportional increase). However, theoretical models of inventory competition are ambiguous on the expected sign of the service-level effect. Via a Web crawler, we obtained data on inventory and sales for more than 200 dealerships over a six-month period. Using cross-sectional variation, we estimated the effect of the number and type of local competitors on inventory holdings. We used several instrumental variables to control for the endogeneity of market entry decisions. Our results suggest that the service-level effect is strong, nonlinear, and positive. Hence, we observe that dealers carry more inventory (controlling for sales) when they face additional competition.

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Date posted: October 20, 2011  

Suggested Citation

Olivares, Marcelo and Cachon, Gerard, Competing Retailers and Inventory: An Empirical Investigation of General Motors' Dealerships in Isolated U.S. Markets (September 10, 2009). Management Science, Vol. 55, No. 9, pp. 1586-1604, 2009 ; Columbia Business School Research Paper . Available at SSRN: http://ssrn.com/abstract=1946447

Contact Information

Marcelo Olivares (Contact Author)
Columbia University - Columbia Business School - Decision Risk and Operations ( email )
3022 Broadway
Uris Hall, #417
New York, NY 10027
United States
HOME PAGE: http://www.columbia.edu/~mo2338/index.htm

University of Chile - Departamento de Ingenieria Industrial ( email )
Republica 701 Santiago
Chile
Gerard Cachon
University of Pennsylvania - Operations & Information Management Department ( email )
Philadelphia, PA 19104
United States
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