“One of the most influential strands of thought contends that the crisis can be attenuated by changing the terms of ‘unaffordable’ mortgages,” the economists said in the paper posted on the Boston Fed’s Web site today. Yet policies aimed at reducing a borrower’s debt-to-income ratio “face important hurdles in addressing the housing crisis,” the authors said.

Instead, the government should consider alternatives such as loans to homeowners to bridge the loss of income for one or two years caused by unemployment, or helping borrowers become renters, the economists said.