1. COVID Bailout Tracker
https://covidbailouttracker.com/program/airline-industry-bailouts
2. Labor Market Impacts of COVID-19 on Hourly Workers in Small- and Medium-Sized Businesses: Four Facts from Homebase Data
https://irle.berkeley.edu/labor-market-impacts-of-covid-19-on-hourly-workers-in-small-and-medium-sized-businesses-four-facts-from-homebase-data-2/
3. The economics of being an airport hub city
4. Fear, Lockdown, and Diversion: Comparing Drivers of Pandemic Economic Decline 2020;Goolsbee,2020
5. Effects of Novel Coronavirus (COVID_19) on Civil Aviation: Economic Impact Analysis
https://www.icao.int/sustainability/Documents/COVID-19/ICAO_Coronavirus_Econ_Impact.pdf