It is argued that the propensity to cooperate may be negatively affected by competition. Experimental evidence support this hypothesis. In a set of three experiments in which different degrees of competition characterize the markets, participants reduce their contributions to a public project as...

This paper illustrates ALEX4.1, the 2007 version of the program of simulation of electoral systems developed at ALEX, the Laboratory for Experimental and Simulative Economics of the Università del Piemonte Orientale at Alessandria, Italy. The main features of the program have been...

he paper describes a program for comparing electoral systems based on the simulation of the preferences of the voters. The parameters requested (distribution of first preferences, district magnitude, etc) are set up by the user. The program produces the resulting Parliament under a number of...

The paper describes a simulation program for comparing electoral systems. The user fixes some basic features, like the distribution of first preferences, their peakedness, the dimension of the districts, and so on. The program produces the resulting Parliament under a number of electoral system,...

This paper describes a study of the robustness of cooperative conventions. We observe the effect of the invasion of non-cooperating subjects into a community adopting a cooperative convention. The convention is described by an indefinitely repeated prisoner-dilemma game. We check the effects on...

The paper presents the results of some simulations of the effect of the invasion of non-cooperating subjects into a community adopting a cooperative convention. The convention is described by an indefinitely repeated prisoner-dilemma game. We check the effects on the robustness of the...

The paper presents the results of some simulations of the effect of the invasion of non-cooperating subjects into a community adopting a cooperative convention. The convention is described by an indefinitely repeated prisoner-dilemma game. We check the effects on the robustness of the...