What is the economic contribution of a cohort of new entrants? Previous research has investigated this topic but only in passing, and found conflicting results. We analyze a cohort of 6578 firms that entered in 2004, and track them for 10 years with an emphasis on size, which is measured using (deflated) sales data from the entrepreneurs’ bank account records. The overall economic contribution of the cohort decreases in the years after entry. Post-entry growth is not sufficient to offset the economic loss from high exit rates. Broadly similar results are found when disaggregating by firm size and industry.

中文翻译：

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随着时间的推移，一批新公司的经济贡献

一批新进入者的经济贡献是什么？先前的研究对此主题进行了调查，但仅是通过，发现了矛盾的结果。我们分析了一组在2004年进入的6578家公司，并跟踪了他们10年，重点是规模，该规模是使用企业家银行帐户记录中的（固定）销售数据来衡量的。入职后的几年中，该队列的总体经济贡献下降。进入后的增长不足以抵消高退出率带来的经济损失。按公司规模和行业进行分类时，发现的结果大致相似。