migration policy

Officials at Ellis Island used to keep visitors out because they had tuberculosis, says Muzaffar Chishti of the US-based Migration Policy Institute.

美国移民政策研究所（Migration Policy Institute）的穆扎法尔•齐矢堤（Muzaffar Chishti）说，埃利斯岛（Ellis Island，原美国移民局所在地）的官员曾拒绝有结核病的游客进入。

European citizenship takes many challenges to traditional nationality law , social and migration policy of nation state.

欧洲公民身份的建立超越了由民族国家定义的传统的政治概念框架.

Ms Newland of the Migration Policy Institute in Washington, DC, says the flows between poor and mid-income countries are huge but "desperately understudied".

华盛顿移民政策研究所的Newland女士表示，贫穷和中等收入国家的移民浪潮规模庞大，但又“绝对可以理解”。

The US has about equal infrastructure, more investment in human capital, better economic institutions and a more active skilled migration policy.

与欧盟相比，美国基础设施水平不相上下，但人力资本投资更多，经济体制更完善，技术移民政策更积极。