From the Introduction: "Many economists believe that under the right economic conditions, public investment in infrastructure will contribute to long-term growth. However, if the investment is financed through government debt or made during an economic expansion, this could dampen or even negate the impact. This report discusses the potential benefits and drawbacks of public infrastructure investment, the state of public infrastructure investment in the economy, and potential future plans for additional public infrastructure investment. While the report focuses on public infrastructure investment, we note there is a significant amount of private infrastructure investment in this country as well."
CRS Report for Congress, R46826
Congressional Research Service: https://crsreports.congress.gov/