Within a laboratory experiment we investigate a principal-agent game in which agents may,first, self-select into a group task (GT) or an individual task (IT) and, second, choose workeffort. In their choices of task and effort the agents have to consider pay contracts for bothtasks as offered by...

In auctions an outside seIler offers a commodity for sale and collects the revenue w hich is achieved. In fair division games the object is owned by the group of bidders. Consequently the auction's revenue is equally distributed among all bidders. In our experiment participants face four auction...

Modern 'principal-agent theory' has made a lot of progress in proposing theoretical Solutions to agency problems. This paper contributes to a better understanding of behavior in agency situations. In particular, we provide experimental evidence on offered contracts and effort choices in a simple...