The liquidity effect and long-run neutrality

The propositions that monetary expansion lowers short-term nominal interest rates (the liquidity effect), and that monetary policy does not have long-run real effects (long-run neutrality), are widely accepted. Yet to date the empirical evidence for both is mixed. We reconsider both propositions simultaneously in a structural VAR context, using a model of the market for bank reserves due to Bernanke and Mihov (1998). We find little basis for rejecting either the liquidity effect or long-run neutrality. Our results are robust over the space of admissible model parameter values, and to the use of long-run rather than short-run identifying restrictions.