Immigration enforcement cooperation between final-destination and transit countries has increased in the last decades. I examine whether the Southern Border Plan, an immigration enforcement program implemented by the Mexican government in 2014, has curbed intentions of unauthorized migrants from El Salvador, Guatemala, and Honduras to migrate to the United States. I use the announcement of the Southern Border Plan to implement a difference-in-differences approach and compare the evolution of short-run intentions to engage in additional unauthorized crossings of Central American (treatment group) relative to Mexican deportees (comparison group). The findings suggest that increased enforcement in Mexico decreases the likelihood of attempting repeated unauthorized crossings.

中文翻译：

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墨西哥南部边境加强执法的影响：来自中美洲被驱逐者的证据。

在过去几十年中，最终目的地国和过境国之间的移民执法合作有所增加。我研究了墨西哥政府于 2014 年实施的移民执法计划“南部边境计划”是否遏制了来自萨尔瓦多、危地马拉和洪都拉斯的未经授权的移民前往美国的意图。我使用南部边境计划的公告来实施差异中的差异方法，并比较了相对于墨西哥被驱逐者（比较组）从事中美洲（治疗组）的其他未经授权越境的短期意图的演变。调查结果表明，墨西哥加强执法减少了尝试多次未经授权越境的可能性。