This paper is the first to estimate the effect of two international agreements (Rotterdam Convention, RC, and the Stockholm Convention, SC) in reducing trade in hazardous substances. We estimate the effects of ratification of these agreements on imports of the affected products putting emphasis...

In this paper, the effect of technological innovation on sectoral exports is analysed using a gravity model of trade. The technological achievement index (TAI) and its four components, creation of technology, diffusion of old innovations, diffusion of recent innovations and human skills, are...

This paper focuses on the relationship between technological innovation and international trade. In particular, the effect of technological achievement on exports is studied. In order to measure technological innovation, the technological achievement index (TAI) is used, thus providing a summary...

This paper evaluates the performance of alternative estimation methods for multiplicative and log models with heteroskedasticity. Contrary to Santos Silva and Tenreyro (2006), the results of a simulation study indicate that the Pseudo Poisson Maximum Likelihood estimator (PPML) is not always the...

This paper presents a theoretical gravity model of trade in which foreign aid is considered as a transfer instead of being part of the trade cost, as it has been previously done in the related literature. We argue that the usual specification leads to invalid out-of-sample predictions, biased...

This paper presents a theoretical gravity model of trade in which foreign aid is considered as a transfer instead of being part of the trade cost, as it has been previously done in the related literature. We argue that the usual specification leads to invalid out-of-sample predictions, biased...