In the wake of Donald Trump’s call for lower US interest rates in the midst of solid economic growth and low unemployment, The Economist magazine ran a couple of articles on the threat of populist leaders to central bank independence (CBI) and low inflation.
It is more than 40 years since the publication of the intellectual justification for CBI of Finn Kydland and Edward Prescott, propounding the idea of time inconsistency. Based on the concept of the natural rate of unemployment (NRU), political control of interest rates will give rise to the temptation for politicians to boost aggregate demand and lower unemployment in the short run, below the NRU. This will prove unsustainable over the longer run, merely producing higher inflation, with inevitable costs to economic efficiency and growth.
This was apparently what caused the stagflation of the 1970s, when unemployment and inflation rose together, undermining the putatively Keynesian Phillips curve. The upshot is that politicians and voters are better off with CBI, with the central bank given a fixed mandate of low inflation and autonomy in how it achieves this.
But what is the reality of CBI and monetary policy? Here are some quotes from heterodox economists critiquing the mainstream consensus. Continue reading