“Estimating the Overcharge of the Liquefied Petroleum Gas Cartel in Brazil’s Federal District:: Evidence from Before-and-After and Difference-in-Differences Approaches”. Revista De Defesa Da Concorrência, vol. 13, nº 2, dezembro de 2025, p. 140-59, https://doi.org/10.52896/rdc.v13i2.1955.