Recently gravity trade models are applied to disaggregated trade data. Here many zeros are characteristic. In the presence of excess zeros usual Poisson Pseudo Maximum Likelihood (PPML) is still consistent, the variance covariance matrix however is invalid. Correct economic interpretation...

The deepening of the Barcelona Agreement and the discussions of the creation of a Mediterranean Union has awakened the interest of the non-EU Mediterranean countries to expand their exports to the European markets. This study analyses the factors that influence the German imports of olive oil by...

This paper investigates the effect of the customs union between Turkey and the European Union on the balance of trade in Turkey. The framework for analysis is an extended trade gravity model onto which the impact of the customs union is applied. The gravity model of trade is estimated using...

Brain drain as a migration of skilled and educated labor is an important issue from years ago and this is one of the critical matters with which the developing countries like Iran are engaged. So because of the importance of this subject in this study we have concentrated on investigating on...