New studies estimate making all public transit free nationwide in Brazil would cost around $17 billion per year, sparking debate over who pays the bill.

Ending Brazil's 6x1 work week could push bus fares up as much as 8%, transport operators warn, though regulated fares mean cities may absorb the cost.

New studies estimate making all public transit free nationwide in Brazil would cost around $17 billion per year, sparking debate over who pays the bill.