... output. The new structuralist argument rests, therefore, on the contentions that the intermediation of the formal sector is not full and that informal sector resources, and not the other components ... exported abroad in the form of capital flight, or claimed by informal markets such as the informal credit market, the underground economy and the black market for foreign exchange. The fact that ... (R); the portion which is claimed by the informal financial sector (N), the proportion which is claimed by the underground economy including the black market for foreign exchange (U), the portion...