For a decade after the revolution, the land question, especially in cities, was among the most contested issues in the Islamic Republic. The collapse of state authority, coupled with the populist convictions of the new regime and spontaneous popular land occupations labeled as “revolutionary housing,” led to the dramatic expansion of cities. Tehran doubled in size within two years, and Ahvaz tripled in area from . But only a small fraction of this geographic expansion was confiscated private land. The rest, more than 90 percent of the total distributed, had been public land. From 1979 to 1993 nearly half a million hectares of predominantly public unoccupied land was converted into private and cooperative residential property. New state institutions like the "Urban Land Organization and the Housing Foundation" played the key role in this massive transfer of property. By the mid-1980s more than 60 percent of all urban residential land transactions were being allocated by the state.