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美国政府进一步限制移民，还不断收紧签证政策，并声称此举将为美国人腾出数十万个工作岗位。然而恐怕要事与愿违了。新研究发现，收紧签证只会迫使企业在海外招工和设立办事处。 Employers are relocating jobs to Canada. REUTERS/CARLOS OSORIO President Donald Trump has been trying to encourage firms to hire more American workers by increasing restrictions on visas for skilled foreign workers, including by suspending the H-1B visa program in June. 为了鼓励企业雇佣更多美国劳动者，特朗普总统一直在不断收紧外籍技术劳工签证，包括在六月暂停临时工作签证。 But a new study found that blocking out skilled labor actually encourages companies to move jobs abroad, where they can hire locally or more easily obtain a visa. That means more new jobs in countries like Canada, India, and China, not in the US, as president Donald Trump has claimed. 但是一项新研究发现，把技术劳工挡在国门外事实上会鼓励公司把职位迁至海外，在那里他们可以在当地招工或者更容易获得签证。这意味着在加拿大、印度、中国等国家会产生更多新职位，而不像特朗普总统声称的那样会给美国增加就业机会。 “It’s not that a company really only has two options, which is either hire an immigrant in the US or hire an American in the US,” said Britta Glennon, the National Bureau of Economic Research economist who wrote the study. “They actually have more options than that.” | 
