In this paper, we investigate the extent to which changes in US labour
market policy in the 1980s may have contributed to the emergence of a
n unemployment rate gap between Canada and the United States. In that
decade, unemployment insurance benefits became taxable, income tax fat
es fell substantially, and various administrative changes were made th
at effectively tightened unemployment insurance eligibility requiremen
ts. These policy changes are evaluated in the context of a computable
equilibrium model of the labour market. Our estimates suggest that all
of these reforms together can account for no more than a 0.4 percenta
ge point decline in the US natural rate of unemployment; a combined ef
fect which accounts for 20 per cent of the unemployment rate gap.