Individual Heterogeneity and Average Welfare

Jerry Hausman () and Whitney Newey
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Jerry Hausman: Institute for Fiscal Studies and MIT

No CWP42/14, CeMMAP working papers from Centre for Microdata Methods and Practice, Institute for Fiscal Studies

Abstract: Individual heterogeneity is an important source of variation in demand. Allowing for general heterogeneity is needed for correct welfare comparisons. We consider general heterogenous demand where preferences and linear budget sets are statistically independent. Only the marginal distribution of demand for each price and income is identified from cross-section data where only one price and income is observed for each individual. Thus, objects that depend on varying price and/or income for an indiviual are not generally identified, including average exact consumer surplus. We use bounds on income effects to derive relatively simple bounds on the average surplus, including for discrete/continous choice. We also sketch an approach to bounding surplus that does not use income effect bounds. We apply the results to gasoline demand. We find tight bounds for average surplus in thisapplication but wider bounds for average deadweight loss.

Date: 2014-10-06
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Related works:
Journal Article: Individual Heterogeneity and Average Welfare (2016)
Working Paper: Individual heterogeneity and average welfare (2013)
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