The U.S. economy finally seems to be recovering in earnest, with housing on the rebound and job creation outpacing growth in the working-age population. But the news is good, not great — it will still take years to restore full employment — and it has been a very long time coming. Why has the slump been so protracted?

The answer — backed by overwhelming evidence — is that this is what normally happens after a severe financial crisis. But Mitt Romney’s economic team rejects that evidence. And this denialism bodes ill for policy if Mr. Romney wins next month.

About the evidence: The most famous study is by Harvard’s Carmen Reinhart and Kenneth Rogoff, who looked at past financial crises and found that such crises are typically followed by years of high unemployment and weak growth. Later work by economists at the International Monetary Fund and elsewhere confirmed this analysis: crises that followed a sharp run-up in private-sector debt, from the U.S. Panic of 1893 to the Swedish banking crisis of the early 1990s, cast long shadows over the economy’s future. There was no reason to believe that this time would be different.

This isn’t an after-the-fact rationalization. The Reinhart-Rogoff “aftermath” paper was released almost four years ago. And a number of other economists, including, well, me, issued similar warnings. In early 2008 I was already pointing out the distinction between recessions like 1973-5 or 1981-2, brought on by high interest rates, and “postmodern” recessions brought on by private-sector overreach. And I suggested that the recession we were then entering would be followed by a prolonged “jobless recovery” that would feel like a continuing recession.