Pré-publication, Document de travail: In this paper, we provide empirical evidence on the impact of IT diffusion on the stability of employment relationships. We document the evolution of the different components of job instability over a panel of 350 local labor markets in France, from the mid 1970s to the early 2000s. Although workers in more educated local labor markets adopt IT faster, they do not experience any increase in job instability. More specifically, we find no evidence that the faster diffusion of IT is associated with any change in job-to-job transitions, and we find that it is associated with relatively less frequent transitions through unemployment. Overall, the evidence goes against the view that the diffusion of IT has spurred job instability. Combining the local labor market variations with firm data, we argue that these findings can be explained by French firms' strong reliance on training and internal promotion strategies in order to meet the new skills requirement associated with IT diffusion.