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100			_aZivin, Joshua Graff et al _941726
245			_aWhen externalities collide: Influenza and pollution
260			_aAmerican Economic Journal: Applied Economics
300			_a15(2), Apr, 2023: p.320-351
520			_aInfluenza and air pollution each pose significant health risks with global economic consequences. Their shared etiological pathways present a case of compounding health risk via interacting externalities. Using instrumental variables based on changing wind direction, we show that increased levels of contemporaneous pollution increase influenza hospitalizations. We exploit random variation in effectiveness of the influenza vaccine as an additional instrument to show that vaccine protection neutralizes this relationship. Thus, pollution control and vaccination campaigns jointly provide greater returns than those implied by addressing either in isolation. We show the importance of this consideration in addressing observed gaps in influenza incidence by race.- Reproduced
650			_aInfluenza, Pollution _941727
773			_aAmerican Economic Journal: Applied Economics
906			_aPOLLUTION
942			_cAR