So here we are, three years later. How’s it going? Inflation has fluctuated, but, at the end of the day, consumer prices have risen just 4.5 percent, meaning an average annual inflation rate of only 1.5 percent. Who could have predicted that printing so much money would cause so little inflation? Well, I could. And did. And so did others who understood the Keynesian economics Mr. Paul reviles. But Mr. Paul’s supporters continue to claim, somehow, that he has been right about everything.

Still, while the original proponents of the doctrine won’t ever admit that they were wrong — my experience is that nobody in the political world ever admits to having been wrong about anything — you might think that having been so completely off-base about something so central to their belief system would have caused the Austrians to lose popularity, even within the G.O.P. After all, as recently as the Bush years, many Republicans were all for printing money when the economy slumps. “Aggressive monetary policy can reduce the depth of a recession,” declared the 2004 Economic Report of the President.

What has happened instead, however, is that hard-money doctrine and paranoia about inflation have taken over the party, even as the predicted inflation keeps failing to materialize. For example, in February, Representative Paul Ryan, who is somewhat inexplicably regarded as the party’s deep thinker on matters economic, harangued Mr. Bernanke on how terrible it is to “debase” a currency and pointed to a rise in commodity prices in late 2010 and early 2011 as evidence that inflation was finally coming. Commodity prices have plunged since then, but there is no sign that Mr. Ryan or anyone else is having second thoughts.

Now, it’s still very unlikely that Ron Paul will become president. But, as I said, his economic doctrine has, in effect, become the official G.O.P. line, despite having been proved utterly wrong by events. And what will happen if that doctrine actually ends up being put into action? Great Depression, here we come.