In this paper, we are going to reconsider the standard Viner Model [Viner, 1950] however under the premise of firm heterogeneity. By means of a graphical analysis we show that a consideration of the degree of firm heterogeneity is important for an evaluation of a preferential trade agreement....

Recently, discussion about the appropriate estimation of gravity trade models has started in agriculture. Here, we are going to review recent developments in the literature. It appears that fixed effects Poisson Pseudo Maximum Likelihood is not only the only consistent estimator [Santos Silva...

In den letzten Jahren entwickelte sich eine lebhafte Debatte, wie NGOs ineffizientes Verhalten sowie Reputationsprobleme besser in den Griff bekommen können. Ein großer Teil dieser Debatte konzentrierte sich auf Accountability-Standards. Allerdings weisen diese Maßnahmen eine ernstzunehmende...

Change management projects typically fail because they meet employee resistance created by emo-tional sensemaking processes. In this article, we present:(a) an in-depth explanation for these failures and,(b) how change managers could avoid them. Our argument is presented in the following three...