Infrastructure costs: A replication analysis of Brooks and Liscow (2023)
Brooks and Liscow (2023) studies the cost of constructing the US interstate highway. They find that the cost per mile tripled from the 1960s to the 1980s, and that this cost increase is not explained by selection of geography or rising input prices. Using restricted data and the original code, I successfully replicate the original results. I perform several robustness checks and find that the original results are robust.