I’m currently exploring the "Coetzee World Cup Effect," a new economic theory that explains how mega-events like the FIFA World Cup can cause a temporary spike in GDP followed by post-event stagnation due to underutilized infrastructure and unsustainable investments.

Historical examples such as South Africa (2010) and Brazil (2014) illustrate that although these events boost tourism and create jobs, the long-term economic outcomes are often disappointing without a follow-up strategy. In South Africa, R33 billion was invested, but stadiums are now underutilized. In Brazil, nearly 1 million jobs were created, yet GDP gains were offset by infrastructure debt and recession in 2015.

I'm looking to gather insights from economists, urban planners, and policy researchers:

• What proven strategies have host countries used to sustain economic momentum after major international events?
• How can countries better integrate mega-event infrastructure into long-term urban and economic development plans?
• What policy or tourism models exist to maintain international interest after the event concludes?

Any case studies, papers, or economic models that support post-event growth would be highly appreciated.