COMPENSATING WAGE DIFFERENTIALS AND SHIFT WORK PREFERENCES. Evidence fromFrance

Abstract

Workers with difficult working conditions can be expected to be com-pensated by higher wages. They may, for example, choose shift work because of compensating wages but it is also possible that they prefer shift work. The previous empirical evidence is mixed. We study if there are compensating wages for shift work by estimating a switching regression model with endogenous switching using French matched employeremployee data for male full time blue collar workers. It is crucial to adjust for selectivity and not to pool data for shift and day workers. A main result is that there is a significant shift premium, the wage rate for shift workers is 16 percent higher than for day workers. A second main result is that the shift premium is significant for shift work choice. This premium compensates workers who do not selfselect into shift work. A 1 percentage point increase in the premium increases the shift work probability by 0.87 percentage points.