We analyse optimal environmental policies in a market that is vertically differentiated in terms of the energy efficiency of products. Considering energy taxes, subsidies to firms for investment in more eco-friendly products, and product standards, we are particularly interested in how...

At borders where rich and poor countries meet, services prices differ hugely. In principle, price differentials could be exploited to mutual benefit, offering improved job opportunities to the poor as well as better shopping opportunities to the rich. However, cross-border shopping is often...

Aging changes the political power in a democracy in favor of the elder generations. Consequently, the retirees can extend the pay-as-you-go financed pensions. Under free labor mobility like within the EU, the success of gerontocracy, nevertheless, is restricted by migration of the young...

Purpose: Scheduling a fleet of product tankers in a cost effective and robust way to satisfy orders is a complex task. A variety of constraints and preferences complicate this attempt. Manual solutions as common in tramp shipping are not sufficient to deliver optimal and robust schedules....

In this note, we present a novel channel for a brain gain. Students from a developing country study in a developed host country. A higher permanent migration probability of these students appears to be a brain drain for the developing country in the first place. However, it induces the host...

In this paper, we analyse the role of mobility in tax and subsidy competition. Our primary result is that increasing ‘relocation’ mobility of firms leads to increasing ‘net’ tax revenues under fairly weak conditions. While enhanced relocation mobility intensifies tax competition, it...

In this paper, we analyse how increasing student migration from a less developed to a developed country alters education policy in the developed country, and how it affects human capital and welfare in the two countries. We argue that a higher permanent migration probability, i.e., a higher...

In this paper, we analyse the implications of labour market integration in a two-region model with local human capital externalities and congestion eects. We show that integration can be a double-edged sword. Integration and the ensuing agglomeration of skilled labour can reduce 'real' income in...