September’s housing figures may be a sign of a recovery by Neil Irwin

Here’s the thing, however: The overbuilding of houses during the boom years, while real, was not extraordinary by historical standards. The underbuilding of houses has been far greater than the excess housing construction during the boom relative to demographic trends. 

That means that other factors are probably major culprits in the housing weakness of the past four years: A terrible job market that has made people unwilling or unable to get a mortgage, an overhang of foreclosures that has kept the market for houses from clearing and extreme caution by banks and other lenders that has made it hard to get mortgages. 

Now each of those trends seems to be healing. Few would argue that a return to the housing bubble days of 2005 is attractive, but what if, over the coming year, housing returned to its longer-term trend? 

In the second quarter of 2012, residential investment was 2.39 percent of GDP. As a rough estimate of the longer-term trend for that number, let us use its average level for the entire decade of the 1990s: 4.07 percent. (Using the 1990s is a bit arbitrary; even using various other base lines yields similar numbers.) 

If residential investment converged to that longer-term average, it would add 1.7 percentage points to overall growth in the coming year.

(via Dean Baker)

Baker is right, this good article helped elucidate the subject for me. I was confused by DeLong's graphs which showed now recovery in the housing sector. As Irwin writes, it's because of an overhang of foreclosers and a lack of demand for new housing. So DeLong's graph isn't showing that that there's a lack of demand overall, but that the housing market isn't clearing. That's true but there is also a lack of demand overall. A Fed targeting NGPD would fix this.

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