
31
legislation, housing rulings in court, and regulatory systems), primacy, informality, affordability
(rent as a percent of income, construction cost as a percent of income, land prices as a function of
density), quality, safety, permanence, homelessness, home ownership, and systemic volatility of
the housing finance system.
According to the Housing Indicators Program, a World Bank
program that sought to characterize important housing indicators in the early 1990s, an
exhaustive list of useful indicators includes: GNP per capita, national level of urbanization,
inflation over the previous decade, country financial depth, capital population, house price to
income ratio, rent to income ratio, house price appreciate as a percent, down-market penetration,
housing credit portfolio, credit to value ratio, mortgage rate to prime rate difference in basis
points, mortgage to deposit difference in basis points, mortgage arrears rate, owner occupancy,
public housing stock, unauthorized housing, squatter housing, homelessness, floor space per
person, persons per room, households per dwelling unit, permanent structures, water connection,
journey to work in minutes, annual new household formation, residential mobility, vacancy rate,
housing starts, housing investment as a percent, industrial concentration, import share of
construction, construction cost, construction skill ratio, average construction time in months,
land development multiplier, land conversion multiplier, infrastructure expenditures per capita,
urban density, minimum city lot size, salable land ratio, extent of rent control, permits delay, and
foreclosure delay. Ideally, all of this information would be listed in our case studies, which
would allow for a powerful comparative perspective on different city case studies. However, due
to a lack of data, this outcome is difficult to achieve. Instead, this paper attempts to comment at a
high level on ten different categories of important values: socioeconomic context, housing
prices, housing finance, housing tenure, housing quality, housing market dynamics, housing
Susan Wachter. “International Housing Comparisons: Introduction and Indicators” (presentation, International
Housing Comparisons course, Philadelphia, PA, January 9, 2013).