A typical problem of research in the area of Service-Oriented Systems is the composition of a set of services for executing a complex task. In this paper we face an instance of this problem in which a set of parties (be they peers, agents or systems) have to interact according to a given choreography. In particular, we mean to exploit the role definitions contained in the choreography for reali...

Health is increasingly seen as relevant to foreign policy; nevertheless, it remains subordinate to other interests. In particular, the interests of security and economics are often presented as more critical than health. This is due to a failure to sufficiently recognize the legal obligations that states have undertaken to ensure the human right to health. This article argues that health should...

III

in the 21st century, distinctions and boundaries between global health, international politics, and the broader interests of the global community are harder to define and enforce than ever before. as a result, global health workers, leaders, and institutions face pressing questions around the nature and extent of their involvement with non-health endeavors, including international conflict reso...

No public policy issue is more important than the structure and level of taxes. Governments have fallen because of tax reform. Proposals to extend the value-added tax (VAT) or increase its rates have caused po liti cal agitation in many countries, including Ec ua dor and Mexico. In many less-developed countries, a shortage of funds impedes development eff orts, yet attempts to increase tax reve...