Il processo di rinnovamento urbano negli Stati Uniti - Il caso di New York City-

The author emphasizes the central role carried out by the speculation in determining the urban and suburban territory of New York City,as well as most part of the american cities. It has been analyzed how the process of urban revitalization (gentrification) is used as means of intervention by the speculator,who can create and/or accelerate the decline of a neighborhood to gentrify the same one and causing the forced shifting of residents with lower income.Fiscal and housing policies are analyzed from the 1960's,because ,on the contrary,it would have been impossible to understand the actual problems of the city : the case of the homeless and of the skid-rows,the polarization of the income,the increase in the number of the mobile homes,the poverty,the overcrowding,the crisis in the construction of hosing,the abandonment of buildings,the unemployment. With the new globalization and new financial capitalism,from the 1980's the cuts in social expenditures and the deregulation have implied the abandonment of the federal state role about subsidized housing and an unrestrained competition that generates risky,high-yield bank investment strategies.The author suggests an urban planning that has to protect,through a correct legislation,the weak,according to an oblique structure of the power that determines urban land use and developing,at the same time,the mechanisms useful to create a democratic control on the decisions in the matter of land use.