The paper studies the short run and long run effects of the introduction of a Pay-for-Performance, P4P, payment scheme. Providers of a public service are assumed to employ more than one agent. If agents have different attitude to the job (for example only a portion of the agents has some form of...

The paper studies tax evasion in an evolutionary setting. In addition to standard variables such as the fine they may have to pay if found guilty or the probability of being audited, individuals' inclination to engage in tax evasion may also be affected by social interactions. Individuals...