Cambios en la calidad de los bienes

Abstract

Combining the estimates of price and income elasticities of demand functions for goods that could be get from cross section and time series data, it is possible to estimate the average changes of the goods quality. In order to do this we analyze the bias that are present in the estimates of price indexes unadjusted by quality changes for the particular good and in general for all the goods included in the income concept; and adding some hypothesis about the relationship between quality adjusted and unadjusted price indexes it is possible to get an estimate of this quality changes. We also study the possible discrepancy between elasticity estimates coming from cross-section and time series data, and we give an explanation for this under our model.