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    Determining how many people live in Seattle, perhaps of a certain age, perhaps from a specific country, is the sort of question that finds its answer in the census, a massive data dump for places across the country. But just how fresh is that data? After all, the census is updated once a decade, and the U.S. Census Bureau’s smaller but more detailed American Community Survey, annually. There鈥檚 also a delay between when data are collected and when…

The U.S. economy has long been powered in part by the nation鈥檚 ability to attract the world鈥檚 most educated and skilled people to its shores. But a new study of the worldwide migration of professionals to the U.S. shows a sharp drop-off in its proportional share of those workers 鈥� raising the question of whether the nation will remain competitive in attracting top talent in an increasingly globalized economy. The study, which used a novel method of tracking people through…