Are we heading for a 1970s-style inflationary spiral? Not according to Catherine Mann, former chief economist at Citigroup, who argues that we are now less exposed to fluctuations in oil prices than we were then. She also makes the case that businesses are more reluctant to put up prices and that the link between inflation and wages is weaker than it was in the years of high inflation when wages often rose three or four times a year and prices in the shops were jacked up more frequently than now.