Three topics exemplify how knowledge of employment draws on various disciplines, which are so led to intimate collaboration, mainly on economics, statistics and econometrics. In order to distinguish between "frictional unemployment" and "disequilibrium unemployment", it is convenient to refer to...

Considering the contribution of the Cowles research institute to the development of econometrics, one has little choice in this address and must mainly focus attention on one major achievement, namely, the building of the simultaneous equation methodology. One does not need to demonstrate the...