论文标题
评估季节性关税率配额对瑞士蔬菜价格的影响
Assessing the effects of seasonal tariff-rate quotas on vegetable prices in Switzerland
论文作者
论文摘要
因果估计蔬菜的种类繁多和不同生长季节的因果估计，关税率配额（TRQ）对蔬菜生产商价格的短期影响受到阻碍，因此很少进行。我们使用新颖的瑞士和邻国每周生产商价格的新数据集量化了瑞士季节性TRQ对各种蔬菜的国内生产商价格的影响。我们发现，在大多数蔬菜的主要收获时间，TRQ将大多数蔬菜的价格提高了邻国的价格超过20％，而某些蔬菜的价格甚至超过50％。与有机蔬菜相比，对于更易腐烂的蔬菜和传统生产的蔬菜，这种作用更强。但是，我们没有发现TRQ对蔬菜每周价格波动的明显切割影响，尽管与邻国相比，瑞士的总较低价格波动可能是TRQ系统的结果。
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.
