2026 General Seminar no. 3 - Ian Crawford (Oxford)

Title: The demand for integers; revealed preference and welfare economics with partially-observed choice sets

by Ian Crawford

Abstract:  ‘Scanner' data are replacing traditional consumption surveys. However, they present a number of challenges which current methods can’t deal with: multivariate integer-valued demands, partially observed choice sets, many corner/edge solutions and high dimensionality. This paper (which is work-in-progress) may have found a way forward using some old ideas from duality theory and some new results from revealed preference theory. It presents an application using US scanner data to measure the welfare cost of price changes at the individual-level.