The Lock-in Effects of Part-time Unemployment Benefits

We ran a large randomized controlled experiment among about 150,000 recipients of un- employment benefits insurance in France in order to evaluate the impact of part-time unem- ployment benefits. We took advantage of the lack of knowledge of job seekers regarding this program and sent emails presenting the program. The information provision had a significant positive impact on the propensity to work while on claim, but reduced the unemployment exit rate, showing important lock-in effects into unemployment associated with part-time unemploy- ment benefits. The extension of the duration of compensated unemployment counterbalanced the increase in the number of days worked while on claim so that the net expenditure of unemployment insurance remained unchanged. Key words: Unemployment insurance; Part-time unemployment benefits; Lock-in effects; Unemployment duration.