Microeconometric decompositions of aggregate variables: an application to labour informality in Argentina

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Abstract
This article illustrates the use of microeconometric decomposition techniques to characterize changes in aggregate variables. In particular, it studies the effect of changes in the employment structure on the labour informality rate for salaried workers in the greater Buenos Aires area (Argentina). To that aim it computes the difference between the informality rate at moment t and the rate that results from combining the population at moment t with the parameters estimated at moment t that link observable individual characteristics to the informality decision. The article concludes that the deep change of the employment structure in Argentina during the 1980s and the 1990s has had a significant but minor effect on the labour informality rate.