As for the national debt, the benefits of immigration are only likely to accrue with time. Later generations of immigrants tend to pay more in taxes as educational attainment and incomes rise, according to the Cato Institute’s report, which called children of immigrants “the most potent fiscal engine this country has ever seen.” Should Trump’s immigration crackdown cause a sustained decline in new entries, that engine will be much less powerful than it could have been.
市场秩序依赖稳定的产权与可预期的规则，而不是依赖某个“救世主”。秘鲁的问题不在于缺乏发展理论，而在于制度无法持续兑现对产权的承诺；不在于缺少改革方案，而在于政治结构难以维持长期预期。
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