HIGHLIGHTS
SUMMARY
Following the convention that the last author is typically the principal investigator and "the head of the lab that hosted most of the research"91, throughout the study, the city in which the last author`s affiliation resides is considered to be the city from which the paper has originated. The second outcome measure is productivity-the number of AI papers that the city has produced each year. In 2019, Beijing produced three times as many papers as the second most productive city (Shanghai) and housed three times as many AI scientists as the . . .
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