In what circumstances should foreign aid be given to less developed co
untries with repressive rulers? Repressive rulers are assumed to contr
ol the national income and to trade it against the probability of stay
ing in office which is assumed in turn to depend positively on popular
wealth and repression. A foreign donor aware of this process of optim
ization will pursue his international objectives by attaching conditio
ns to his aid that alter the relative price of repression and popular
wealth in the calculations of the tyrant. The effectiveness of direct
and in-kind aid and the desirability of a ''carrot an stick'' aid poli
cy depend on the direct and the interactive effects that popular wealt
h, repression, and the parameters of economic growth exert on the regi
me's stability and its level of income.