Measuring the dispersion of productivity or efficiency across firms in a market or industry is rife with methodological …

productivity growth at the aggregate and firm level during the post-war period. Growth is driven by the development of both (i … variance of aggregate productivity growth is determined mainly by the arrival rate of general innovations. Ceteris paribus, the … increase in firm-level volatility, and a decline in aggregate volatility. The effect on productivity growth is ambiguous. On …