This paper finds an empirical evidence that al Qaeda behaves as a contest organizer rewarding a prize to candidate extremist groups. Would-be terrorists must then compete with each other to prove their commitment and ability. Hence to maximize their own probability of winning the prize, each...

By using official time series of the Italian evaded VAT base (Ministry of Finance) for the period 1980-2004 we investigate empirically the long-run characteristics of tax evasion and the relationship with the tax burden. We focus on three important issues not analyzed so far. First, using...

This paper analyses how tax morale and countries' institutional quality affect the shadow economy, controlling in a multivariate analysis for a variety of potential factors. The literature strongly emphasizes the quantitative importance of these factors to understand the size and development of...

Policymakers often propose strict enforcement strategies to fight the shadow economy and to increase tax morale. However, there is also a bottom-up approach such as, for example, decentralizing the political power to those who are close to the problems. Thus, this paper analyses the relationship...