Disclosure of lobbying activity has become much more timely and stringent in the US, and many demand similar regulation also for lobbying in the European Union. Disclosure informs voters about a lobbyist’s activity, but it also informs rival lobbying groups, with strategic consequences. Under...

Increasingly, lobbying groups are subject to transparency requirements, obliging them to provide detailed information about their business. We study the effect this transparency policy has on the nature of lobbying competition. Under mild conditions, mandated transparency leads to an increase in...

I develop a formal model of political campaigns in which candidates choose how to distribute their resources over two different policy issues. I assume that campaigning on an issue has two simultaneous effects, both rooted in social and cognitive psychology: It increases the perceived quality of...

My dissertation consists of three chapters, all three devoted to incentives in contests and the role of heterogeneity. Chapter 1 characterizes conditions under which introducing multiple prizes in a contest can be used to guarantee efficient incentives for the production of a public good when...

Multiple-prize contests are important in various fields of economics ranging from rent seeking over labour economics, patent and R&D races to tendering for (governmental) projects. Hence it is crucial to understand the incentive effects of multiple prizes on effort investment. This survey...