Monetary Policy and Birth Rates : The Effect of Mortgage Rate Pass-Through on Fertility

This paper examines whether monetary policy pass-through to mortgage rates affects household fertility decisions. Using administrative data on UK mortgages and births, our empirical strategy exploits variation in the timing of when families were eligible for a rate adjustment, coupled with the large reductions in interest rates that occurred during the Great Recession. We estimate that each 1 percentage point drop in the policy rate increased birth rates by 2%. In aggregate, this pass-through of accommodative monetary policy to mortgage rates was sufficiently large to outweigh the headwinds of the Great Recession and prevent a ‘baby bust' in the UK, in contrast to the US. Our results provide new evidence on the nature of monetary policy transmission and suggest a new mechanism via which mortgage contract structures can affect aggregate demand and supply