Empirical data suggest that new fi rms tend to grow faster than incumbent firms in terms of their productivity. A sticky-price model with learning-by-doing in new firms fi ts this data and predicts that for plausible calibrations, the optimal long-run inflation rate is positive and between 0.5%...

Does immigration accelerate sectoral change towards high-productivity sectors? This paper uses the mass displacement of ethnic Germans from Eastern Europe to West Germany after World War II as a natural experiment to study this question. A simple two-sector specific factors model, in which...