Since the economic crisis of the 1980s, developing economies worldwide have experienced rapid expansion in the informal sector in response to a lack of jobs in the formal, wage-paid sector. However, the effects of formal-informal sector dualism on macroeconomic growth have been widely overlooked in mainstream policy debates.This dissertation develops a two-sector, structuralist, macroeconomic model designed to determine the effect of urban informal sector activity on growth policy and income distribution. Cross-sectional informal sector firm data from a Johannesburg survey is used to confirm stylized facts posited in the literature and employed as assumptions in the theoretical model. Other features unique to the model include: class differ...