手法を比較

	Gentrification Analysis	Bid-Rent Analysis
分野	Urban Studies	Human Geography
系統	Process / pipeline	Regression model
提唱年	1979	1964
提唱者	Ruth Glass (term, 1964); Neil Smith (rent-gap theory)	William Alonso
種類	Pipeline for detecting and measuring neighbourhood socioeconomic upgrading and displacement	Theory of urban land rent and land-use allocation by distance to the centre
原典	Smith, N. (1979). Toward a theory of gentrification: A back to the city movement by capital, not people. Journal of the American Planning Association, 45(4), 538–548.	Alonso, W. (1964). Location and Land Use: Toward a General Theory of Land Rent. Harvard University Press, Cambridge, MA. ISBN: 9780674537019
別名	Gentrification Measurement, Neighbourhood Upgrading Analysis, Rent Gap Analysis, Displacement Risk Analysis	Bid-Rent Theory, Alonso Bid-Rent Model, Urban Land-Rent Model, Bid-Rent Curve Analysis
関連	4	4
概要	Gentrification analysis is the set of methods used to detect, measure, and map the process by which a previously disinvested, lower-income neighbourhood is upgraded through an influx of capital and higher-status residents, often displacing the existing population. It typically combines repeated small-area census data on income, education, tenure, and rents with housing-market indicators to compute change indices that flag where socioeconomic status is rising fastest. Grounded in Neil Smith's 1979 rent-gap theory, the analysis frames gentrification as the reinvestment of capital in places where the gap between actual and potential land rent has grown large enough to be profitable.	Bid-rent analysis is the urban-economics theory that explains how land rent and land use are organized by distance to the city centre. Developed by William Alonso in 1964, it represents each land use — commerce, industry, housing — by a bid-rent curve giving the maximum rent that use is willing to pay at each distance from the central business district. Because uses with steeper curves outbid others for central land, the observed rent is the upper envelope of all the curves, and the city sorts into concentric zones with the highest bidder winning each ring.