The present study aims to investigate the dynamics of primary commodity prices and the role of speculation over time. In particular the relationship between speculation and price volatility on the one side, and the linkage between excessive speculation and price volatility on the other side, is...

In this work we update the reviews on endogenous growth theories, after two decades of theoretical and empirical contributions in order to explore whether recent empirical studies have become more supportive of their main predictions. Among the core topics studied in the growth econometric...