Abstract The Norwegian salmon farming sector has experienced an increase in industry concentration for the last 20 years attributed to agglomeration externalities and scale economies; big firms increase their size and market share while small firms remain operating at the minimum level. However, small firms have higher profitability ratios than their bigger counterparts, a fact that contradicts economic theory as less efficient firms (and less profitable) will not grow and eventually will disappear. This paper quantifies the role of idiosyncratic demand and distortions on observed productivity differences across Norwegian salmon producers from 2001 to 2016. By using a data set that measures directly firm-level quantities, prices and sales, it is possible to break down the sources of total factor productivity dispersion on technical inefficiency and firm fundamentals. The understanding of total factor productivity (TFP) dispersion is useful as micro-productivity changes can point out aggregate productivity movements that matter on industrial and macroeconomic policies.

中文翻译：

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公司分散和全要素生产率：随着时间的推移，挪威三文鱼生产者的效率是否会降低？

摘要 由于集聚外部性和规模经济，挪威鲑鱼养殖业在过去 20 年中经历了行业集中度的提高。大公司扩大规模和市场份额，而小公司则保持在最低水平。然而，小公司的盈利率比大公司高，这一事实与经济理论相矛盾，因为效率较低的公司（和利润较低的公司）不会成长，最终会消失。本文量化了 2001 年至 2016 年间挪威三文鱼生产者观察到的生产力差异的特殊需求和扭曲的作用。 通过使用直接衡量公司层面数量、价格和销售的数据集，可以根据技术效率低下和公司基本面来分解全要素生产率分散的来源。理解全要素生产率 (TFP) 离散度是有用的，因为微观生产率的变化可以指出对工业和宏观经济政策很重要的总体生产率变动。