econ135 fall08 lecture2

econ135 fall08 lecture2 - Urban Economics Lecture 2 Urban...

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1 Urban Economics Lecture 2 Urban Definitions and Trends in Urbanization in the U.S. How to measure cities and urban phenomena? I. Municipality: a local government (established by the state) with fixed boundaries. II. Urbanized area: A municipality of 50,000 or more plus the surrounding area that has 1,000 people per sq. mile or more. There were 396 of them in 1990. This is the urban ideal, but little data is collected by urban areas. III. PMSA (Primary Metropolitan Statistical Area). Consists of the central city/cities plus the rest of the county plus adjacent counties if they are economically integrated with the core. Adjacent counties must meet a threshold level of commuting to the central county and a threshold level of population density.
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2 This means that much of the land in “cities” is rural! Most urban data is collected for metropolitan areas rather than urbanized areas. Note: UA and PMSA definitions change over time as additional area/additional counties are added. IV. CMSA (Consolidated Metropolitan Statistical Area) A CMSA consists of two central cities/metropolitan areas that have a combined metropolitan population of at least one million. (They also change over time.)
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econ135 fall08 lecture2 - Urban Economics Lecture 2 Urban...

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