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“Of course, variation in theorists’ labor supply may be driven in part by factors correlated with outcomes of interest. We therefore instrument using lagged average visa processing time interacted with the number of days before October 1 that each program’s ‘math camp’ started…” @tropicsentence/1162113910696292352
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And for all you haters who think I tweet too many of these IV jokes… @lukestein/1125424795649110016