This paper sets out to explain the Canadian-US unemployment rate gap t
hat has persisted since 1982. The gap, which appeared in two stages, h
as lasted through peaks and troughs in economic activity. We use a pan
el of five Canadian and nine US regions to search for the causes. The
1971 liberalization of the Canadian unemployment insurance system can
explain the first occurrence of the gap, which was veiled by preferabl
e raw material price movements during the 1970s. The further widening
of the gap in the '90s is the result of the tougher post 1987 Bank of
Canada stance in fighting inflation.