In our forthcoming Brookings book, Sports, Jobs, and Taxes, we and 15 collaborators examine the local economic development argument from all angles: case studies of the effect of specific facilities, as well as comparisons among cities and even neighborhoods that have and have not sunk hundreds of millions of dollars into sports development. In every case, the conclusions are the same. A new sports facility has an extremely small (perhaps even negative) effect on overall economic activity and employment. No recent facility appears to have earned anything approaching a reasonable return on investment. No recent facility has been self-financing in terms of its impact on net tax revenues. Regardless of whether the unit of analysis is a local neighborhood, a city, or an entire metropolitan area, the economic benefits of sports facilities are de minimus.
As noted, a stadium can spur economic growth if sports is a significant export industry—that is, if it attracts outsiders to buy the local product and if it results in the sale of certain rights (broadcasting, product licensing) to national firms. But, in reality, sports has little effect on regional net exports.
Sports facilities attract neither tourists nor new industry. Probably the most successful export facility is Oriole Park, where about a third of the crowd at every game comes from outside the Baltimore area. (Baltimore’s baseball exports are enhanced because it is 40 miles from the nation’s capital, which has no major league baseball team.) Even so, the net gain to Baltimore’s economy in terms of new jobs and incremental tax revenues is only about $3 million a year—not much of a return on a $200 million investment.
This was from a Brookings Institute study from the late 90’s…after the first wave of new stadiums around the country.
https://www.brookings.edu/articles/sports-jobs-taxes-are-new-stadiums-worth-the-cost/#:~:text=In every case%2C the conclusions,a reasonable return on investment.