The paper summarizes knowledge on tax gaps in Poland with respect to PIT, CIT, VAT, and excise. An introduction to the Polish tax system is given, trends in tax collect ability and estimates of the tax gaps are discussed, and methods of combating tax evasion and avoidance are reviewed. The paper...

This Technical Assistance Report presents the estimates of tax gaps for general sales tax (GST) and corporate income tax in Costa Rica. The estimated GST compliance gap in Costa Rica increased from 29 percent in 2012 to 31 percent in 2016. The compliance gap in 2016 was equivalent to 1.9 percent...

Several recent studies suggest that equalizing transfers in a federal system may distort the tax policy decisions of states. We study this issue for the German federal fiscal system. In a simple theoretical model, we first identify a substitution and an income effect of equalizing transfers. Our...