Bertrand competition under decreasing returns involves a wide interval of pure strategy equilibrium prices. We first present results of experiments in which two, three and four identical firms repeatedly interact in this environment. Less collusion with more firms leads to lower average prices....

We study collusive behaviour in experimental duopolies that compete in prices under dynamic demand conditions. In one treatment the demand grows at a constant rate. In the other treatment the demand declines at another constant rate. The rates are chosen so that the evolution of the demand in...

This paper examines determinants of revolutionary behaviour. We study the role of freedom of communication, repression of opposition and the government’s selfishness. Combining econometric analysis of survey data with a laboratory experiment, we analyse how these factors affect preferences for...

Donors often rely on local intermediaries to deliver benefits to target beneficiaries. Each selected recipient observes if the intermediary under-delivers to them, so they serve as natural monitors. However, they may withhold complaints when feeling unentitled or grateful to the intermediary for...

We study how conflict in contest games is influenced by rival parties being groups and by group members being able to punish each other. Our motivation stems from the analysis of socio-political conflict. The theoretical prediction is that conflict expenditures are independent of group size and...

We introduce two variants of the one-shot joy-of-destruction minigame (mini-JOD). Two players are endowed with the same amount of money. They simultaneously decide whether or not to reduce the payoff of the other player at an own cost. In one treatment there was a probability that Nature would...