When the Rio Olympics kicks off next month, the Brazilian government will have spent over $4.5 billion on new stadiums, an Olympic village, international broadcast and media centers, transportation, administration, the workforce, and so on. That’s significantly more than it planned when the games were awarded to Rio in 2009. The cost overrun is probably around 50 percent, but nobody can be certain until after the games end. Whatever the final figure, it is set to break the original budget by a substantial margin.