Among the variables included in my ongoing monthly monitoring of key transportation indexes is revenue passenger miles for domestic flying. That monitoring has shown a huge pandemic-related drop in flying during the spring of 2020 and a gradual rebound later in 2020 and in early 2021. However, the underlying data for that analysis (from the Bureau of Transportation Statistics ) are published with a substantial lag. For example, the latest data, published on June 10, 2021, are for March 2021. However, one related variable is published with only a one-day delay: the number of TSA screenings . Consequently, this brief analysis appends the monthly data for miles flown through March 2021 from my monthly monitoring with the number of TSA screenings through June 12, 2021. There is no on-to-one correspondence between revenue passenger miles for domestic flying and the number of TSA screenings. This is the case because (1) […]