Brock School of Business
800 Lakeshore Drive
Birmingham, AL 35229
Institutional Affiliation: Samford University
NBER Working Papers and Publications
|June 2018||Do Walmart Supercenters Improve Food Security?|
with Charles J. Courtemanche, Murugi Ndirangu, Xilin Zhou: w24750
This paper examines the effect of Walmart Supercenters, which lower food prices and expand food availability, on household and child food insecurity. Our food insecurity-related outcomes come from the 2001-2012 waves of the December Current Population Study Food Security Supplement. Using narrow geographic identifiers available in the restricted version of these data, we compute the distance between each household’s census tract of residence and the nearest Walmart Supercenter. We estimate instrumental variables models that leverage the predictable geographic expansion patterns of Walmart Supercenters outward from Walmart’s corporate headquarters. Results suggest that closer proximity to a Walmart Supercenter improves the food security of households and children, as measured by number of a...
Published: Charles Courtemanche & Art Carden & Xilin Zhou & Murugi Ndirangu & Craig Gundersen, 2019. "Do Walmart Supercenters Improve Food Security?," Applied Economic Perspectives and Policy, vol 41(2), pages 177-198.
|July 2011||Competing with Costco and Sam's Club: Warehouse Club Entry and Grocery Prices|
with Charles J. Courtemanche: w17220
Prior research shows grocery stores reduce prices to compete with Walmart Supercenters. This study finds evidence that the competitive effects of two other big box retailers - Costco and Walmart-owned Sam's Club - are quite different. Using city-level panel grocery price data matched with a unique data set on Walmart and warehouse club locations, we find that Costco entry is associated with higher grocery prices at incumbent retailers, and that the effect is strongest in cities with small populations and high grocery store densities. This could be explained by a segmented-market model, or by incumbents competing with Costco along non-price dimensions such as product quality or quality of the shopping experience. We find no evidence that Sam's Club entry affects grocery stores' prices, ...
Published: Charles Courtemanche & Art Carden, 2014. "Competing with Costco and Sam's Club: Warehouse Club Entry and Grocery Prices," Southern Economic Journal, Southern Economic Association, vol. 80(3), pages 565-585, January. citation courtesy of