Cost projections go haywire

Outturn costs are significantly higher than the cost projections

Note: Figures for outturn costs in billions, constant 2022 USD. * Tokyo 2020 Olympics happened in 2021 due to COVID-19. **Paris 2024 Olympics' costs are part estimates.
Source: Budzier and Flyvbjerg, The Oxford Olympics Study 2024: Are Cost and Cost Overrun at the Games Coming Down?