Job creation and the intra-distribution dynamics of the firm size distribution

Based on a three-equation model for initial firm size, survival, and firm growth we estimate firm-specific transition probabilities between size classes of the firm size distribution. This allows to analyze counterfactual scenarios that assess the impact of changes in exogenous variables on the intra-distribution dynamics of the firm size distribution. We find that a counterfactual decrease in average firm age increases the exit hazard of young firms, and at the same time reduces the probability of observing high-growth firms. An increase in the industry-wide entry rate and an increase in market growth, by contrast, have virtually no impact on the intra-distribution dynamics of the firm size distribution. Finally, a larger birth size increases the probability for the youngest and smallest firms to become high-growth firms.