Abstract

This paper proposes a technique for obtaining more precise estimates of demand and supply curves when one is constrained to market-level data. The technique allows one to augment market share data with information relating consumer demographics to the characteristics of the products they purchase. This extra information plays the same role as consumer-level data, allowing estimated substitution patterns and (thus) welfare to directly reflect demographic-driven differences in tastes for observed characteristics. I apply the technique to the automobile market, estimating the economic effects of the introduction of the minivan. I show that models estimated without micro data yield much larger welfare numbers than the model using them, primarily because the micro data appear to free the model from a heavy dependence on the idiosyncratic logit “taste ” error. I complete the welfare picture by measuring the extent of first-mover advantage and profit cannibalization both initially by the innovator and later by the imitators. My results support a story in which large improvements in consumers ’ standard of living arise from competition as firms cannibalize each other’s profits by seeking new goods that give them some temporary market power. I.

Citations

856	Large sample properties of generalized method of moments estimators - Hansen - 1982
183	Econometric Models of Probabilistic Choice’, in C. Manski and - McFadden - 1981
88	Valuation of New Goods Under Perfect and Imperfect Competition - Hausman - 1996
55	Product Differentiation and Oligopoly - Goldberg - 1995
41	Measuring spillovers from 'technical advance - Bresnahan - 1986
38	Market Segmentation and the Sources of Rent from Innovation - Bresnahan, Stern, et al. - 1997
38	The Welfare Analysis of Product Innovations, with an Application to Computed Tomography Scanners - Trajtenberg - 1989
30	The Economics of New Goods - Gordon
14	From Superminis to Supercomputers: Estimating the Surplus in the Computing Market - Greenstein - 1996
7	Combining Micro and - Imbens, Lancaster - 1994
6	Applications and Limitations of Some Recent - Pakes, Berry, et al. - 1993
4	The Generalised Theory of Consumer’s Surplus - Hicks - 1946
3	Gains from Trade in Differentiated Products: Japanese Compact Trucks - Feenstra - 1988
2	Products Demand Systems from a Combination of Micro and Macro Data: The New Vehicle Market - “Differentiated
1	Quality Adjustment in the CPI and Methods to Improve It - Armknecht - 1984
1	The Effect of the Arab Boycott on Israel - Fershtman, Gandal - 1998