Recently, various studies have used the Poisson Pseudo-Maximal Likehood (PML) to estimate gravity specifications of trade flows and non-count data models more generally. Some papers also report results based on the Negative Binomial Quasi-Generalised Pseudo-Maximum Likelihood (NB QGPML)...

Between 1950 and 1973, a process of absolute convergence was at work between the technological leader, the USA, West European countries and Japan. The catching up process between developed countries gradually vanished between 1973 and 1995. On the one hand, we had a revival of US labour...

[fre] Entre 1950 et 1973, un processus de convergence des niveaux de productivité du travail était observable entre les États-Unis, considérés comme le leader technologique du monde, et les pays d’Europe de l’Ouest et le Japon. Mais ce processus s’est progressivement atténué pour...

Following Santos Silva and Tenreyro (2006), various studies have used the Poisson Pseudo-Maximum Likelihood to estimate gravity specifications of trade flows and non-count data models more generally. Some papers also report results based on the Negative Binomial estimator, which is more general...

This paper studies the change in the distance elasticity of trade between 1948 and 2006. The elasticity sharply increased, when gravity equations are estimated by ordinary least squares in log form (log-OLS), while it was broadly stable or slightly increasing, depending on the specification,...

This paper provides a detailed descriptive analysis of patterns of urbanization across Sub-Saharan Africa for the year circa 2015. Despite the rapidity and importance of Sub-Saharan Africa's urbanization, little is known about the anatomy of patterns of urbanization across the region due to a...