Rushing to opportunity: City growth and entrepreneurship
构建了一个模型，解释城市和产业增长中出现的“冲刺”现象，认为早期人口流动取决于新实体提供的机遇，并用城市和产业数据提供了初步证据。
The growth of many cities and industries differs, with some growing slowly and others experiencing rapid change—i.e., rushes. To explain these differences and explore the mechanisms of growth, we develop a model centered on a new trade-off between time-varying fundamentals and time-invariant – but rank-dependent – opportunities. Early population flows depend on the opportunities new entities provide, whether from available land in cities or the accumulation of entrepreneurship human capital in firms. Our model can explain the existence of rushes and their size. We provide suggestive empirical evidence on city- and industry growth consistent with the model’s predictions.