Short‐term impact of food safety standards on agri‐product exports: Evidence from Japan's positive list system on Chinese vegetable exports
研究日本2006年实施的肯定列表制度对中国蔬菜出口的短期影响，发现该制度使中国企业出口概率下降3.4%，出口量和出口值分别下降9.7%和8.6%，且主要影响贸易深度而非广度。
Abstract We examine the short‐term impact of the Positive List System (PLS), a strict food safety standard implemented by Japan in 2006, on vegetable exports from China to Japan. By applying a difference‐in‐difference model to unique monthly export data at the firm‐product level, we found that the PLS decreased the probability of Chinese vegetable firms exporting to Japan by 3.4%, and decreased their export quantity and value by 9.7% and 8.6%, respectively. Most of the policy impact is through a decrease in the intensive trade margin (i.e., how much to trade), rather than the extensive trade margin (i.e., whether to trade). We also found that foreign‐invested enterprises and smaller enterprises are less affected than non‐foreign‐invested enterprises and larger enterprises. Our results alleviate the concern that stricter food safety standards may exclude many firms, especially small ones, from the export market.