The St. Louis Fed published a report today titled: The Legacy of the Olympics: Economic Burden or Boon?
Sadly, the paper doesn’t answer its own question and the only insight is to point out a boost temporary employment in the two US-held Games over the past 20 years. Presumably, the data from other countries was too painstaking to find or too obvious to state.
The paper does have this one gem:
Greece, serves as a shocking example of failed legacy planning; the majority of facilities used in the 2004 Games are in a state of ruin.
It also took Montreal 30 years to pay the costs of the 1976 Olympics.
