.

We investigate the causes of increasing concentration in the Canadian air carriers industry over the last four decades, and assess possible links with deregulation and investment decisions. We measure the technology of firms in a dynamic framework that includes regulation. The model is tested...

In the standard framework of data envelopment analysis (DEA) models, the returns to scale are fully characterized using the multiplier on the convexity constraint of inefficient decision making units (DMU) using the projection of the input–output vector on the frontier. In this note, we...

Allocation of resources to schools in a centrally managed state system, as the Tunisian one, should depend on the performance of the individual institutions. The optimal size is of crucial importance in this context and we need accurate measurement for sound policies. This article discusses and...