Cities emerge from the spatial concentration of people and economic activities. But spatial concentration is not enough; the economic viability of cities depends on people, ideas, and goods to move rapidly across the urban area. This constant movement within dense cities creates wealth but also...

"The Home Owners' Loan Corporation purchased more than a million delinquent mortgages from private lenders between 1933 and 1936 and refinanced the loans for the borrowers. Its primary goal was to break the cycle of foreclosure, forced property sales and decreases in home values that was...