Publications
Wan, X., Harris-Lagoudakis, K. and Crespi, J. (2026). Shrinkflation, Unit Price Disclosure and Consumer Welfare: Evidence from Canned Tuna. Food Policy, Forthcoming. [pdf]
Wich, H. and Harris-Lagoudakis, K. (2025). Does SNAP Participation Increase Bulk Purchases? Journal of Public Economics, 249, 105442. [Published Article]
Harris-Lagoudakis, K. and Wich, H. (2024). Purchases Over the SNAP Benefit Cycle: Evidence from Supermarket Panel Data. Economic Inquiry, 62(4), 1426-1448. [Published Article]
Conlin, M., Dickert-Conlin, S., and Harris-Lagoudakis, K. (2024). Establishment Level Information as Proxies for Demand, Congestion and Social Interaction. Economics Letters, 111833. [Published Article]
Conlin, M., K. Harris-Lagoudakis, C. Haughey, S. Jung, and H. Wich. (2024). The New Normal: Grocery Shopping Behavior Changes before and after the COVID-19 Vaccine. Applied Economic Perspectives and Policy, 1–24. [Published Article]
Harris‐Lagoudakis, K. (2023). The Effect of Online Shopping Channels on Brand Choice, Product Exploration and Price Elasticities. International Journal of Industrial Organization, 102918. [Published Article]
Harris‐Lagoudakis, K. (2022). Online Shopping and the Healthfulness of Grocery Purchases. American Journal of Agricultural Economics, 104(3), 1050-1076. [Published Article]
FSN Best Paper Award, AAEA
Top Downloaded AJAE Article 2021
Media Coverage: The Wall Street Journal
Working Papers
Joint with Christian Cox
This paper evaluates demand when making unhealthy products, like soda, in-eligible for purchase with in-kind benefits. We utilize policy variation to identify how product specific in-kind eligibility affects the marginal propensity to consume. Difference-in-Difference estimates suggest a 6 to 14 percent decline in soda purchases if soda was made ineligible for purchase with Supplemental Nutrition Assistance Program (SNAP) benefits. We then estimate a model with mental accounting to rationalize observed patterns. We find that soda purchases would decline by up to 22 percent if soda were made ineligible. In addition, juice purchases would increase by 7 percent, decreasing sugars purchased from beverages by 7 percent.
JEL: D12, I12, I18, I38, L66
Keywords: mental accounting, retail scanner data, SNAP
Select Work in Progress
WIC Online Grocery Orders and Redemption Rates
Joint with Michael Conlin and Stacy Dickert-Conlin
Liquidity and Bulk Purchasing Among SNAP Recipients
Joint with Hannah Wich
The Effect of Childhood Environmental Exposure on Behavior in Adulthood
Joint with Angelos Lagoudakis, Sujin Oh and Rebecca L.C. Taylor
The Effects of Restricting the Use of SNAP Benefits on Shopping Patterns and Nutrition
Joint with Hannah Bae, Michael Conlin, Stacy Dickert-Conlin
Choice Set–Dependent Preferences in Grocery Purchases
Joint with Michael Conlin and Andrew Zeyveld