We normally end up thinking that this frictional unemployment is going to be 3 perhaps 4% of the labour force at any one time.

FORBES: The Problem With US Unemployment Is That It Is Now Like European Unemployment

There will probably always be some frictional unemployment even in good times, but individual incentives on the supply side will keep pressing for employment individually and toward full employment collectively.

FORBES: Supply Side Employment Growth

We have frictional unemployment.

FORBES: The Problem With US Unemployment Is That It Is Now Like European Unemployment