<P> In capitalist economies, however, available resources are not fully used . In times of depression, many people want to work but can't find employment . It supposes that the scarce resources are not fully utilized in a capitalistic economy . </P> <P> If productive capacity grows, an economy can produce progressively more goods, which raises the standard of living . The increase in productive capacity of an economy is called economic growth . There are various factors affecting economic growth . The problems of economic growth have been discussed by numerous growth models, including the Harrod - Domar model, the neoclassical growth models of Solow and Swan, and the Cambridge growth models of Kaldor and Joan Robinson . This part of the economic problem is studied in the economies of development . </P>

In what sense is the problem of how to produce a central problem of an economy