groups. We exploit quasi-random variation in vessels in port from weather events far out in the ocean to estimate how port … traffic influences air pollution and human health. We find that one additional vessel in a port over a year leads to 3 ….0 hospital visits per thousand Black residents within 25 miles of the port and only 1.0 per thousand for whites. We assess a port …

rates also affect competition among mobile operators. We show that the waterbed effect is diluted, but not eliminated, for …