全文大意：
与那些不更换国籍的学者相比，那些更换国籍的学者的科研成果更具有影响力（被引用次数更多）。因此政治家可以考虑通过开放国际人才引进来增加本国科研成果的质量。
Whatever their country of origin, mobile researchers produced more highly cited works than did their non-mobile peers.
The places with large numbers of scientists coming and going did indeed produce papers that were more highly cited, while no such relationship between a country's R&D spending and its scientific impact.
