In this case, the Seoul metropolitan government also collaborated with private partners under a public-private partnership structure to provide public transport (Pucher et al., Revenue is deposited in a trust fund, which in turn proceeds payment for the agents on a weekly basis. This revenue and other charges pursuant to the concession contract contribute to 4% of the system’s budget. The city-owned company that oversees the project, TransMilenio S.A., functioned thanks to city subsidies until 2003.