The 7th ANNUAL DEMOGRAPHIA INTERNATIONAL HOUSING AFFORDABILITY SURVEY (data 3rd Qtr 2010) has just been published and is downloadable from this link
http://www.demographia.com/dhi.pdf
I reproduce below Demographia’s press release, which lays the blame for housing unaffordability on land use regulations. As regular readers of this site know, I see finance as the core problem in house price bubbles rather than land use regulations, but every Ponzi Scheme needs a plausible story, and land use regulations provides one (which has been used to great effect in Australia) while the absence of regulations takes the wind out of a Ponzi yarn.