Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper examines how central supervision influences border pollution, using China's National Specially Monitored Firms (NSMF) program as a quasi-experiment. We show that the program significantly reduces SO2 emission intensity among polluting firms near provincial borders relative to those farther away. The effect is concentrated in firms located downwind of urban areas. The mechanism operates through strengthened local enforcement, as the NSMF program compels stricter monitoring of border-proximate firms. In response, these firms adopt greater end-of-pipe abatement measures to comply with heightened regulatory pressure.