How Federal Spending For Infrastructure And Other Public Investments Affects The Economy

Written in response to a request from the Senate Committee on the Budget, this paper reviews the available data on the economic value of federal investments in infrastructure, education and training, and R&D. It focuses on the empirical evidence produced since July 1991, when CBO last analyzed the issue in the study "How federal spending for infrastructure and other public investments affects the economy."

Drawing on the Fund’s analytical and capacity development work, including Public Investment Management Assessments (PIMAs) carried out in more than 60 countries, the new book Well Spent: How Strong Infrastructure Governance Can End Waste in Public Investment will address how countries can attain quality infrastructure outcomes through better infrastructure governance—an issue becoming increasingly important in the context of the Great Lockdown and its economic consequences. It covers critical issues such as infrastructure investment and Sustainable Development Goals, controlling corruption, managing fiscal risks, integrating planning and budgeting, and identifying best practices in project appraisal and selection. It also covers emerging areas in infrastructure governance, such as maintaining and managing public infrastructure assets and building resilience against climate change.

"Policy-makers often call for expanding public spending on infrastructure, which includes a broad range of investments from roads and bridges to digital networks that will expand access to high-speed broadband. Some point to near-term macro-economic benefits and job creation, others focus on long-term effects on productivity and economic growth. This volume explores the links between infrastructure spending and economic outcomes, as well as key economic issues in the funding and management of infrastructure projects. It draws together research studies that describe the short-run stimulus effects of infrastructure spending, develop new estimates of the stock of U.S. infrastructure capital, and explore the incentive aspects of public-private partnerships (PPPs). A salient issue is the treatment of risk in evaluating publicly-funded infrastructure projects and in connection with PPPs. The goal of the volume is to provide a reference for researchers seeking to expand research on infrastructure issues, and for policy-makers tasked with determining the appropriate level of infrastructure spending"--

To inform debate on a new transportation bill being considered, the authors review the literature on the economic outcomes of highway infrastructure spending, which constitutes the largest share of federal spending on transportation infrastructure. They highlight the connections between highway spending and the economy and then analyze the literature to trace the effects of highway infrastructure on productivity, output, and employment.

We analyze the welfare multipliers of public spending (the consumption equivalent change in welfare for one dollar change in public spending) in a DSGE model. The welfare multipliers of public infrastructure investment are positive if infrastructure is sufficiently effective. When the medium-term output multipliers are consistent with the empirical estimates (1-1.4), the welfare multiplier is 0.8. That is, a dollar spent by the government for investment raises domestic welfare by equivalent of 0.8 dollars of private consumption. This suggests that the welfare gains of public infrastructure investment, if chosen wisely, may be substantial.

Abstract: This paper provides an overview of the various channels through which public infrastructure may affect growth. In addition to the conventional productivity, complementarity, and crowding-out effects typically emphasized in the literature, the impact of infrastructure on investment adjustment costs, the durability of private capital, and the production of health and education services are also highlighted. Effects on health and education are well documented in a number of microeconomic studies, but macroeconomists have only recently begun to study their implications for growth. Links between health, infrastructure, and growth are illustrated in an endogenous growth model with transitional dynamics, and the optimal allocation of public expenditure is discussed. The concluding section draws implications of the analysis for the design of strategies aimed at promoting growth and reducing poverty.