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α: calibrated so average coauthorship-adjusted count equals average raw count
We examine the immediate and bounce-back effects from six modern health crises that preceded Covid-19. Time-series models for a large cross-section of economies indicate that real GDP growth falls by around 2 percentage points in affected economies relative to unaffected economies in the year of the outbreak. Bounce-back in GDP growth is rapid and strong, especially when compared to non-health crises. Unemployment for less educated workers is higher and exhibits more persistence, and there is significantly greater persistence in female unemployment than male. Moreover, the negative initial effects of pandemics and bounce-back are economically contagious through international trade. The negative effects on GDP and unemployment are felt less in economies with larger first-year responses in government spending, especially on health care. Our estimates imply that the impact effect of the Covid-19 shock on world GDP growth is approximately four standard deviations worse than the average past pandemic.