John Kemp Great Debate— John Kemp is a Reuters columnist. The views expressed are his own —

Comparisons between the current downturn and the Great Contraction of 1929-33 have multiplied as commentators and investors have tried to forecast the recession’s likely depth and duration. But as the U.S. economy shows signs of stabilising and attention switches to future inflation the more useful comparison is actually with the 1940s.