Internet experiments are a new and convenient way for reaching a large subject pool. Yet, providing incentives to subjects can be a tricky design issue. One cost effective and simple method is the publication of a high score (as in computer games). We test whether a high score provides adequate...

In this paper we focus on the compliance effects of tax regime changes. According to the economic model of tax evasion, a tax reform should affect compliance through its impact on tax rates and incentives. Our findings demonstrate the importance of at least two further effects not covered by the...

This paper presents the results of experiments carried out in two countries, Germany and Bulgaria, and for different allocation rules (first vs. second price auction vs. fair division game). The data analysis of the sealed-bid, private value-contests compares the bid function in both countries,...