Although Africa has experienced rapid urbanization in recent decades, little is known about the process of urbanization across the continent. This paper exploits a natural experiment, the abolition of South African pass laws, to explore how exogenous population shocks affect the spatial...

History offers many examples of dictators who worsened their behavior significantly over time (like Zimbabwe’s Robert Mugabe), while there are also cases of dictators who have displayed remarkable improvements (like Jerry Rawlings of Ghana). We show that such mutations can result from rational...

History offers many examples of dictators who worsened their behavior significantly over time (like Zimbabwe's Robert Mugabe), while there are also cases of dictators who have displayed remarkable improvements (like Jerry Rawlings of Ghana).  We show that such mutations can result from rational...

Recently, the international community has increased its commitment to prosecute malicious dictators - for example by establishing the International Criminal Court.  This has raised the international community's loss associated with being time-inconsistent (i.e.: granting amnesties ex post), the...

History offers many examples of dictatorswho worsened their behavior significantly over time (like Zimbabwe's Mugabe) as well as dictators who displayed remarkable improvements (like Rawlings of Ghana).We show that such mutations can result from rational behavior when the dictator’s flow use...

We examine the case of payback killings and similar retributive sanctions in the context of a transplant regime such as that existing in Papua New Guinea. This is a post-colonial regime with multiple overlaid legal systems, with significant negative interaction existing between the different...

This discussion paper resulted in a publication in the <A HREF="https://apps.webofknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=5&SID=T2lPmvB33HytcbnHQmV&page=1&doc=4">'Oxford Economic Papers-New Series'</A>, 2013, 65(2), 219-239.<P> This paper first documents the increase in the time lag with which labor input reacts to output fluctuations ("the labor adjustment lag") that is visible in US data since the...</p></a>

Since dollarized countries import US monetary policy, identifying US monetary shocks through sign restrictions on US variables only, does not use all available information. In this paper we therefore include dollarized countries,which enable us to restrict more variables and leave the responses...

As both the natural level of output and the New Keynesian output gap cannot be observed in practice, there is quite some debate on the question how these variables look like in practice. Rather than taking the standard approach of using a time trend or the HP-filter to obtain estimates of these...

Climate skeptics argue that the possibility that global warming is exogenous implies that we should not take additional action towards reducing greenhouse gas emissions until we know more. However this paper shows that even climate skeptics have an incentive to reduce emissions: such a change of...