Discussion

摘要

Fatih Guvenen initiated the discussion by wholeheartedly agreeing with Francesco Caselli that the main mechanism, namely, the rise in unpaid on-the-job training, needs to be empirically documented. He gave the example of a radiologist who entered the U.S. labor market in 1972 and spent all of the 1970s training because of the continuous introduction of new technology during that period. Beyond such anecdotes, and absent stronger empirical evidence, the authors' approach to justifying the mechanism has been to document as many wage implications as possible.