from the Congressional Budget Office
The effect of federal infrastructure spending on private-sector productivity depends in part on the response of state and local governments and in part on how long the investment takes to become productive. Greater emphasis on particular contributions of infrastructure to productivity or different ways of allocating funds could make federal infrastructure spending more productive.
Presentation by Chad Shirley, Deputy Assistant Director for Microeconomic Studies, at the National Association for Business Economics Annual Meeting panel discussion on prioritizing infrastructure investment.
Approaches for Increasing the Productivity of Federal Infrastructure Spending from Congressional Budget Office
Source
https://www.cbo.gov/publication/53129