We use data from the Canadian 2-year longitudinal Labour Market Activi
ty Survey of 1986-87 to estimate the effect of the Unemployment Insura
nce (UI) system on job duration. Particular attention is focused on th
e ''entrance requirements'' of the UI system, which relate eligibility
for UI benefits to an individual's recent employment history. The art
icle makes operational the UI entrance requirement provisions which ta
ke into account variations in the regional unemployment rate. Controll
ing for many personal and job characteristics, we find evidence that a
significant number of jobs terminate when they have reached the durat
ion that would permit a UI claim.