Inclusive Costs (NBER Working Paper No. 22137; March 2016): This study included former Treasury Secretary Lawrence H. Summers and found that a large pandemic imposed the same inclusive economic costs as global warming - $570 billion/year. Collective Action (NBER Working Paper No. 17195; July 2011): Influenza is predominantly spread globally via international airlines and locally via ground transportation. Reducing the costs requires rich countries to collectively focus resources immediately into the originating source of the virus. Vitamin D (NBER Working Paper No. 24340; January 2019): Influenza spreads in winter when everyone is indoors but the virus is also present in the peripheral months of September and October when sunlight remains...