The collapse today in the value of the dollar to a record low in terms of gold prompts us to turn to a just-issued report from Federal Reserve Bank of Philadelphia. It has come out with a study touting gold — the classical measure of monetary value — as a vehicle to achieve stable prices. Incremental though it may be, this news is progress, especially when the Fed is having a hard time, under a fiat money regime, bringing inflation down to its 2 percent target.