Despite the fact that personal possession of currency is not allowed by U.S. prisons, in reality, incarcerated people still exchange goods and services. Until 2003, the year in which the U.S. government banned smoking in federal penitentiaries, dgarettes were the preferred medum of exchange among prisoners. A main difference between using doarettes and usind dollars as money is that have intrinsic value. u.S. dollars are an example of moner