We employ data on gross flows of labour to provide a comparative analy
sis of labour market behaviour in Canada and the US in 1976-94. Althou
gh the relative rise in Canadian unemployment is partly associated wit
h relative changes in the transition probabilities between Unemploymen
t and Employment (in both directions), the rise is more closely associ
ated with movements between the two nonemployment states, Unemployment
and Not-in-the-Labour-Force. A simulation suggests that the relative
increase in Canadian 'labour force attachment' starting in the early 1
980s may have played a sizeable role in the emergence of the unemploym
ent rate gap.