This paper examines the aggregate implications of size-dependent distortions. These regulations misallocate labor across firms and hence reduce aggregate productivity. It then considers a case-study of labor laws in France where firms that have 50 employees or more face substantially more...

We develop and characterize analytically an investment model in discrete time with a fixed adjustment cost not proportional to existing capital and complete irreversibility that reproduces the lumpiness of investment at the micro-level. In agreement with the empirical evidence, as a firm size...

The paper studies human capital accumulation over workers' careers in an on the job search setting with heterogenous firms. In renegotiation proof employment con- tracts, more productive firms provide more training. Both general and specific training induce higher wages within jobs, and with...

This paper studies whether the Rietz-Barro "disaster" model, extended for a time-varying probability of disaster, can match the empirical evidence on predictability of stock returns. It is shown that when utility is CRRA, the model cannot replicate this evidence, regardless of parameter values....