Search Frictions and Evolving Labour Market Dynamics

This paper puts search frictions models under novel empirical scrutiny and tests their ability to match empirical observations. To capture changing dynamics we fit an extended Bayesian time-varying parameter VAR to US labour market data from 1962–2016. We find strong evidence against key predictions of the search frictions model, namely a large surge in vacancy creation in response to productivity shocks and a negative relationship between the volatilities of unemployment and wages. Our results question the amplification mechanism embedded in search frictions models and cast doubt on wage rigidity as a source of unemployment volatility.