This paper reviews the literature on tax assignment in decentralized countries. Ideally, own-source revenues should be sufficient to enable at least the richest subnational governments to finance from their own resources all locally-provided services that primarily benefit local residents....

This paper proposes a method for evaluating the impact of tax structure changes on tax revenue. The technique consists of decomposing the gap between actual revenue and potential revenue into components attributable to changes in (i) the tax rate structure (ii) deductions and (iii) tax evasion....