"Tax expenditures, in the form of tax provisions, are government expenditures. They are conceptually and functionally distinct from those tax provisions whose purpose is to raise revenue. Tax expenditure programs are comparable to entitlement programs. Therefore, tax expenditures must be...

"Using data collected during several missions, Zafar finds that the principal reasons for low revenue mobilization are (1) the adverse fiscal impact of trade liberalization, (2) the defiscalization of agriculture in the 1970s, (3) the collapse of the uranium boom in the 1980s, and (4) the poor...

In this sample of 49 Latin America, OECD, and transition economies, it is the ineffective and discretionary administration of tax and regulatory regimes--not higher tax rates alone--as well as corruption, that increases the size of the unofficial economy. And countries with a large unofficial...