Firm-level innovation is investigated using three probit panel estimators, which control for unobserved heterogeneity, and a standard probit estimator. Results indicate the standard probit model is misspecified and that inter-firm networks are important for innovation.

Wansbeek and Bekker considered a new estimator for simple dynamic panel data models (where there are no exogenous variables) which involved a complex weighting matrix. An operational variant of this estimator is proposed which is applicable to the more realistic case where there are exogenous...

The implications of assuming a coincidence of actual and desired work hours for labour supply estimates are investigated. Results suggest significant differences in the wage elasticities of British male employees reporting that their work hours have been constrained vis-a-vis those reporting...