Morris A. Davis, François Ortalo-Magné, and Peter Rupert:
Recent trends in house prices have induced a certain amount of hand-wringing among leading economists, policymakers, and bloggers of some repute. In the eight-year boom ending sometime last summer, they warned that house prices were rising much faster than ever before, and that such appreciation was unwarranted. As a consequence, these commentators are predicting that prices will fall, perhaps disastrously so.
According to the most widely cited historical data on house prices (compiled by Robert J. Shiller for the 2005 edition of his book, Irrational Exuberance), house prices were roughly flat from 1890 to 1997 (after adjusting for inflation), but since 1998, they have climbed 6 percent per year in the aggregate. Adding to analysts’ sense of trouble is that the rate of house-price appreciation over the boom has varied widely across the United States. The more populated coastal states, such as California and Florida, have experienced nominal gains on the order of 10 percent per year, whereas prices in Midwestern and interior states, like Michigan and Nebraska, appreciated approximately 4 percent per year. The acceleration of prices in the aggregate reflects the fast growth of house prices in the coastal states, so the argument goes, but because growth in house prices has outpaced the growth of residents’ income in these states, analysts argue that the rise in house prices is not supported by economic “fundamentals.” Their observations imply that house prices on the coasts, and therefore in the aggregate, should fall to be more in line with income and fundamentals.
But there is a problem with the data on which these projections rest. They are inaccurate in a particularly important period—the 1970s, a decade which, as it turns out, does offer a precedent for the current situation. A different source of data on housing prices suggests that a housing boom similar to the 1998-2006 boom occurred sometime between 1970 and 1980.