The labour market is a social institution with features that significantly vary across countries. Econometric investigations of the past decades lead to interesting knowledge about the effect on employment of various labour-market structural reforms. This knowledge is, however, imprecise. Hence,...

The productive capacity that a firm would choose must mainly depend on its expectations concerning future demand and the profitability of production. The desired capital intensity must mainly depend on the relative cost of capital with respect to labor. In order to study conditions under which...

Answers to various questions of applied macroeconomics depend on the values given to elasticities of substitution between the demands for factors, these demands being aggregated across productive sectors. Such elasticities reflect not only substitutabilities within productive sectors, but also...

It is often argued that present practices in evaluating employment effects of decreases in the cost of unskilled labor lead to under-estimations: an aggregation bias is ignored when microeconometric estimations are transposed. A model in which appear two elasticites of substitution, one in...

Coming after recent contributions on the history of econometric ideas, my testimony as an old econometrician first touches on the early relations between quantitative economics and economic theory, both in France during the thirties and around the Cowles Commission in Chicago during the late...