Identification in Differentiated Products Markets Using Market Level Data
---- Acknowledgements -----
Earlier drafts were circulated under the title .Identi.cation of Discrete Choice Demand From Market Level Data. We had helpful early conversations on this topic with Rosa Matzkin and Yuichi Kitamura. We also had valuable feedback from Liran Einav, Jon Levin, Tim Bresnahan, and participants in the 2008 Game Theory World Congress, the 2008 LAMES, the 2009 FESAMES, 2009 SETA Conference, the Brown Conference on the Econometrics of Demand, and seminars at Boston College, CREST, Penn, Stanford, USC, UCSD, Virginia, and Wisconsin. Financial support from the NSF is gratefully acknowledged. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.