There is a widely held perception that fundamental tax reform would reduce the level of criminal and other “underground” economic activity. The popular argument relies on the idea that replacing the income tax with a sales tax would implicitly tax the return to criminal activity, whereas the return to crime is effectively untaxed by an income tax. This paper finds instead that the impact of tax...

Fake antivirus (AV) programs have been utilized to defraud millions of computer users into paying as much as one hundred dollars for a phony software license. As a result, fake AV software has evolved into one of the most lucrative criminal operations on the Internet. In this paper, we examine the operations of three large-scale fake AV businesses, lasting from three months to more than two yea...

The problem of tax evasion arises in an economy in which every taxpayer regards the output of the public sector as independent of her actions and the taxpayer can be audited by the public authority and fined, if found guilty. Earlier contributions to the study of tax evasion in a game-theoretical framework include Sandmo (1981), Reinganum and Wilde (1985, 1986), Graetz et al. (1986), Greenberg ...

This paper develops a simple framework to analyze the links between corruption and the unofficial economy and their implications for the official economy. In a model of self-selection with heterogeneous entrepreneurs, we show that the entrepreneurs’ option to flee to the underground economy constrains a corrupt official’s ability to introduce distortions to the economy for private gains. The un...

We developed a simple monetary model to study the effects of tax evasion on the optimal inflation tax. The model is constructed so that inflation might be an indirect way of taxing the underground sector of the economy. We show that while there are theoretical reasons for positive optimal inflation rates, the effects are quantitatively small, even in countries with large underground sectors. We...

Cybercrime activities are supported by infrastructures and services originating from an underground economy. The current understanding of this phenomenon is that the cybercrime economy ought to be fraught with information asymmetry and adverse selection problems. They should make the effects that we observe every day impossible to sustain. In this paper we show that the market structure and des...