This article explores the impact of language proficiency on international trade by using panel data analysis. To do so, we construct a time-variant test-score-based measure of common language. Controlling for the standard gravity model variables, we find strong empirical evidence that English...

This paper first of all discusses some substantive and methodological issues concerned with disentangling the nature of effects in educational progress. We deal with criterion outcomes which are a limited set of ordered category grades for which multilevel generalised linear models are proposed.

The efficiency with which the numerical solution of ordinary differential equations can be generated depends to a large extent on the effectiveness of the stepsize adjustment strategy that is used. A new strategy for carrying out this critical task is proposed in this paper. A distinctive...

It is argued that size distortions and power properties of likelihood based tests for cointegration are so poor in many small sample situstions that alternative are necessary for analysing typical macroeconomic relationships.