Income tax return for taxation also vary, making comparisons all the more difficult. Countries that tax income generally use one of two systems: territorial or residential. In the territorial system, only local income – income from a source inside the country – is taxed. In the residential system, residents of the country are taxed on their worldwide (local and foreign) income, while nonresidents are taxed only on their local income. In addition, a very small number of countries, notably the United States, also tax their nonresident citizens on worldwide income. Countries with a residential system of taxation usually allow deductions or credits
Citizens for Tax Justice CTJ is generally considered a liberal organization, but its research has also been cited by Republican politicians (including President Ronald Reagan) and right-wing tax reform organizations when favorable to their policies. The organization's 2013 Form 990 Tax Return states its purpose is "to promote social welfare." The organization's president, Wayne Cox, is Executive Director of Minnesota Citizens for Tax Justice. CTJ, a 501(c4) organization, is directed by Robert S. McIntyre. Many of the reports written by Citizens for Tax Justice rely on analyses produced by the "ITEP Microsimulation Tax Model", which is housed at its partner organization, the Institute on