The National Trust for Historic Preservation's website has posted a map and report that examines three "hot market cities," one which is ours (the other two are San Francisco and DC) to see if there is a relationship between old buildings and the local economy. And there does appear to be a correlation: areas with older and smaller buildings tend to have more economic activity. The great thing about the report—compiled by Preservation Green Lab, which is based on Capitol Hill—is the amount of useful information it contains, particularly about the Pike/Pine corridor and Chinatown. True, my urban vision is a socialist version of Vancouverism (building up but keeping the streets at a human scale), but a report of this kind is still meaningful because my feeling is that building booms have less to do with improving a city's efficiency and livability and almost all about finding investments for cheap credit (not savings) that would otherwise be nothing. And banks do make money from nothing.