This paper characterizes the optimal information structure in competitive insurance markets with adverse selection. A regulator assigns ratings to individuals according to their risk characteristics, insurers offer fixed insurance contracts to each rating group, and the market clears as in...

In credence goods markets, experts have better information about the appropriate quality of treatment than their customers. Experts may exploit their informational advantage by defrauding customers. Market institutions have been shown theoretically to be effective in mitigating fraudulent expert...

Riordan and Sappington (JET, 1988) show that in an agency relationship in which the agent's type is correlated with a public ex post signal, the principal may attain first best (full surplus extraction and efficient output levels) if the agent is faced with a lottery such that each type is...

It is tricky to design local regulations on global externalities, especially so if firms are mobile. We show that when costs and outside options are firms' private information, the threat of firm relocation leads to local regulations that are stricter, not looser. This result is general and...

The paper studies the role of international implications after EU enlargement. Based on a formal model with migration costs for both capital and labor, it predicts a two-sided migration from the new to the old EU countries which is later reversed. As the migration pattern chosen by market forces...

We review the literature on the political economy of international organizations (IOs). Considering IOs as products of the preferences of various actors rather than monolithic entities we focus on national politicians, international bureaucrats, interest groups, and voters. By looking into the...

We study how policies limiting the spending capacity of local governments may reduce corruption. We exploit the extension of one such policy, the Domestic Stability Pact (DSP), to small Italian municipalities. The DSP led to a decrease in both recorded corruption rates and corruption charges per...

We evaluate the impact of a major European state aid programme for broadband deployment applied to rural areas in the German state of Bavaria in the years 2010 and 2011. Using matched difference-in-differences estimation strategies, we find that aided municipalities have - depending on broadband...

The formation and expansion of the European Union (EU) have attracted much attention. However, the impact on the level of corruption in a nation after joining the Union has not been formally studied. Any nation that joins the European Union potentially faces two different and opposite effects on...