MIMIC models are being used to estimate the size of the underground economy or the tax gap in various countries. In this paper I examine critically both the method in general and three applications of the method by Giles and Tedds (2002), Bajada and Schneider (2005) and Dell’Anno and Schneider...

The method of "excess sensitivity" of Bajada (1999, 2001, 2002) indicates a large underground economy in Australia, with estimates of unrecorded income around 15 per cent of official GDP. These estimates concern policymakers, especially those agencies responsible for national accounts, tax...