This paper investigates the substitution possibilities in the production function between capital and two labour inputs, skilled and unskilled workers. We estimate a very general system of factor demand at the firm level, using original panel data obtained by merging three different sources. We...

We estimate a conditional convergence equation derived from an augmented Solow model where human capital is defined as skilled labour. We implement Generalized Method of Moments (GMM) estimators on a panel of countries. Estimation is carried out on the model in levels instrumented by the lagged...

We estimate the technology of air pollution abatement, defined as a relation between conventional production, emissions and the inputs specifically allocated to the environmental protection. We use original firm-level data on both air emissions and investments in abatement equipment. We deal...