We investigate the impact of innovative work practices on workingconditions. We use a unique French dataset providing information onindividual workers for year 1998. New work practices which play a key rolein the success of the new economy, include job rotation and the use ofquality norms. Working conditions are captured by occupational injuries aswell as indicators of mental strain. Using Rubin’s causal model, we showthat, even after controlling for employee and job characteristics andcorrecting for sample selection bias, workers involved in the new workpractices still face working conditions that are significantly worse thanthose of non innovative workers.