ABN AMRO bank have done some popular financial analysis to propose the impact a nation receives if they win or lose the World Cup.
Although the direct economic impact (higher sales in bars and cafes) is marginal, good performances on the pitch can certainly stimulate an economy. In the past, countries winning the World Cup added around 0.7% to their economic growth. And at the last three tournaments the winning country's stock market considerably outperformed the losing finalist's market. On average there was 10% positive effect in the winner and a 25% negative effect in the loser.