Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We develop a tractable quantitative framework to study the productivity effects of financial crises. The model features endogenous productivity, heterogeneous firm dynamics, and aggregate risk. Selection of the most promising ideas gives rise to a trade-off between mass (quantity) and composition (quality) in the entrant cohort. Chilean plant-level data from the sudden stop triggered by the Russian sovereign default in 1998 confirm the model's main mechanism, as firms born during the credit shortage are fewer but better in terms of idiosyncratic productivity. The quantitative analysis shows that at the end of the crisis, total output is permanently 0.9 percent lower.