Causal estimation of the short‐term effects of tariff‐rate quotas (TRQs) on vegetable producer prices is hampered by the large variety and different growing seasons of vegetables and is therefore rarely performed. We quantify the effects of Swiss seasonal TRQs on domestic producer prices of a variety of vegetables based on a difference‐in‐differences estimation using a novel dataset of weekly producer prices for Switzerland and neighbouring countries. We find that TRQs increase prices of most vegetables by more than 20% above the prices in neighbouring countries during the main harvest time for most vegetables and even more than 50% for some vegetables. The effects are stronger for more perishable vegetables and for conventionally produced ones compared with organic vegetables. However, we do not find clear‐cut effects of TRQs on the week‐to‐week price volatility of vegetables although the overall lower price volatility in Switzerland compared with neighbouring countries might be a result of the TRQ system in place.

中文翻译：

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评估季节性关税配额对瑞士蔬菜价格的影响

关税配额（TRQs）对蔬菜生产者价格的短期影响的因果估计因蔬菜种类繁多和生长期不同而受阻，因此很少进行。我们使用瑞士和邻国每周生产者价格的新数据集，通过差异估计来量化瑞士季节性关税配额对各种蔬菜的国内生产者价格的影响。我们发现，在大多数蔬菜的主要收获时间，关税配额使大多数蔬菜的价格比邻国的价格高出20％以上，对某些蔬菜甚至超过50％。与有机蔬菜相比，更易腐烂的蔬菜和常规生产的蔬菜的效果更强。然而，