The problem of weak instruments is due to a very small concentration parameter. To boost the concentration parameter, we propose to increase the number of instruments to a large number or even up to a continuum. However, in finite samples, the inclusion of an excessive number of moments may be...

The use of many moment conditions improves the asymptotic efficiency of the instrumental variables estimators. However, in finite samples, the inclusion of an excessive number of moments increases the bias. To solve this problem, we propose regularized versions of the limited information maximum...

In this paper, using the framework of a Roy theoretical model, we examine the performance of return migrants in Albania. We ask two main questions: (i) Had they chosen not to migrate, what would be the performance of return migrants compared to the non-migrants? and (ii) What would be the...

Immigration has once again become an important and contentious issue in the European Union. This paper, therefore, contributes to the debate by analysing different dimensions of the problem in the context of EU enlargement, using a consistent model of migration. This recognises that, within...

This paper explores the role of information in the formulation of trade policy for home and foreign country, in a setting in which the home government chooses its subsidy level first after which the foreign firm retaliates by imposing tariffs on its imports. We consider an environment in which...

In this paper, using the framework of a Roy theoretical model, we examine the performance of return migrants in Albania. We ask two questions: (i) Had they chosen not to migrate, what would be the performance of return migrants compared to the non-migrants? and (ii) What would be the performance...

This paper analyses the savings behaviour of natives and immigrants in Germany. It is argued that uncertainty about future income and legal status (in case of immigrants) is a key component in the determination of the level of precautionary savings. Using the German dataset, we exploit a natural...

This paper analyses the impact of remittances on household expenditure behaviour in Senegal. We use propensity score matching and OLS methods to assess the average impact of remittances on several household budget shares. Our results show a productive use of international remittances in Senegal....

Using matched employer-employee data, we analyse the impact of immigrants on natives’ employment in Portugal. Using different model specifications, we show that the natives and immigrants are ‘complements’ at most occupation levels, in the sense that both types are hired when the number of...

Using matched employer-employee data, we analyse the impact of immigrants on natives' employment in Portugal. Using different model specifications, we show that the natives and immigrants are 'complements' at most occupation levels, in the sense that they are jointly hired and fired. Controlling...