BERKELEY – In the mid-2000’s, the United States had a construction boom. From 2003-2006, annual construction spending rose to a level well above its long-run trend. Thus, by the start of 2007, the US was, in essence, overbuilt: about $300 billion in excess of the long-run trend in construction spending.
When these buildings were constructed, they were expected to more than pay for themselves. But their profitability depended on two shaky foundations: a permanent fall in long-term risky real interest rates, and permanent optimism about real estate as an asset class. Both foundations collapsed.