Flight activity is spread thinly across Canadian airports, and its concentration barely moved from the late nineties to the eve of COVID; the small rise that shows comes mostly from airports dropping out of the table.
What this shows: The chart covers 1997 to 2021. It plots Herfindahl-Hirschman index, reporting airports and Herfindahl-Hirschman index, constant 38 airports on a vertical axis of Herfindahl-Hirschman index (movements-weighted). Latest values: Herfindahl-Hirschman index, reporting airports 0.0358; Herfindahl-Hirschman index, constant 38 airports 0.039. Data run through 2021.
Conditions and method
Status: inconclusive (these series may drift on their own, so the usual test of a trend cannot be trusted here, and the test used in its place does not establish a direction).
The table’s national total row is excluded. 2022 is left out because the table stops part-way through the year.