Author Name Variants
Fields of Specialization
Urban economics, Infrastructure economics, Climate change
Externally Hosted Work
Last updated April 12, 2023
Marianne Fay, an economist specializing in sustainable development, is the World Bank director for Bolivia, Chile, Ecuador and Peru. She has 25 years’ experience in different regions of the world, contributing to knowledge on and the search for development solutions in the areas of infrastructure, urbanization, climate change, green growth and poverty reduction. She has published and edited several books and articles, including the “World Development Report 2010: Development and Climate Change,” and the report “Infrastructure in Latin America and the Caribbean: Recent Developments and Key Challenges.” Marianne is a U.S.-French binational.
Publication Search Results
Now showing 1 - 5 of 5
Publication(World Bank, Washington, DC, 2017-02) Fay, Marianne ; Straub, StephaneThis paper documents access to services and ownership of infrastructure-related durables in the water, energy, telecom, and transport areas, based on harmonized household survey data covering 1.6 million households in 14 Latin American countries during 1992 to 2012. The paper provides a systematic disaggregation of access and ownership rates at different levels of income and over time, and econometrically derives the country infrastructure premium, a measure of how much a household benefits from simply being located in a given country. The results show extensive inequality of access, within countries across the income distribution, but also across countries for households at similar levels of income. For water and electricity, for example, up to two-thirds of the variability in individual percentile access to infrastructure services and consumption of related assets can be explained by country residence only. In addition, few country fundamentals appear to be significant in explaining this variability, pointing to policy differences as an important determinant. The paper derives the income elasticity of infrastructure access for the full set of indicators, and uses these to estimate the time that would be needed to close the remaining gap for households at different levels of the income distribution under a "business as usual" hypothesis. Under that scenario, universal access appears to be decades away for many countries in the region. The last part discusses the policy challenges, arguing that in a context in which public budgets face strong constraints and significant increases in private investment are unlikely to be forthcoming, a large part of the solution lies in refocused investment strategies, better demand management, and improved public spending efficiency.
Publication(World Bank, Washington, DC, 2017-04-06) Fay, Marianne ; Andres, Luis Alberto ; Fox, Charles ; Narloch, Ulf ; Staub, Stephane ; Slawson, MichaelLatin America and the Caribbean does not have the infrastructure it needs, or deserves, given its income. Many argue that the solution is to spend more; by contrast, this report has one main message: Latin America can dramatically narrow its infrastructure service gap by spending efficiently on the right things.
Publication(World Bank, Washington, DC, 2018-06) Fay, Marianne ; Martimort, David ; Straub, StephaneThe paper addresses the issue of the feasible level of private finance in a contracting model of infrastructure finding and financing. It characterizes the structure of financial contracts, deriving the conditions under which both public and private finance coexist. A key feature is that access to outside finance and the regulatory decision on pricing and the amount of public subsidy, hence the extent of price recovery, are jointly determined. Mobilizing private finance requires a combination of price for the service and subsidy to the service provider that is large enough, exacerbating the fundamental tensions between financial viability through cost recovery and social inclusion. The paper then shows that the feasibility trade-off responds in non-trivial ways to changes in the economic and institutional environment likely to occur along the development path. While improvements along some of these dimensions, notably in the efficiency of bankruptcy procedures, appear to ease access to private finance, others, such as the cost of public funds, actually makes public finance more efficient. Using project data from the PPI database including information on the financial structure, the authors uncover an inverse U-shaped pattern in the share of private finance, peaking for countries in the upper-middle income range, which echoes their theoretical findings.
Publication(World Bank, Washington, DC, 2019-02) Fay, Marianne ; Lee, Hyoung Il ; Mastruzzi, Massimo ; Han, Sungmin ; Cho, MoonkyoungThe paper provides the first consistently estimated data set on infrastructure investments in low- and middle-income countries. To do so, the authors identify three possible proxies for infrastructure investments: two are variants on gross fixed capital formation from national accounts system data following ADB (2017) and one is based on fiscal data from the World Bank's BOOST database. Two of these proxies rely on the World Bank's Private Participation in Infrastructure database to capture the private share of infrastructure investments. Given the limitations of each of these proxies, the authors employ several transformations to derive a lower-bound estimate for infrastructure investments in low-and middle-income countries of 3.40 percent of their gross domestic product, a central estimate of around 4 percent, and an upper-bound estimate of 5 percent for 2011. Corresponding absolute amounts are US$0.82 trillion, US$1.00 trillion, and US$1.21 trillion, respectively with East Asia and the Pacific accounting for 55 percent of infrastructure investments and Africa 4 percent. The public sector largely dominates infrastructure spending, accounting for 87–91 percent of infrastructure investments, but with wide variation across regions, from a low of 53–64 percent in South Asia to a high of 98 percent in East Asia. Given the absence of fiscal or national accounts data capturing investments in infrastructure, these estimates are likely to be the best available in the near future. Nevertheless, the authors propose some possible avenues for future improvements (including an update when 2017 data are made available by the International Comparison Project), building on the excellent collaboration of multilateral development banks around this issue.
Publication(Washington, DC: World Bank, 2019-02-19) Rozenberg, Julie ; Fay, Marianne ; Rozenberg, Julie ; Fay, Marianne ; Fox, Charles J.E. ; Leifman, Michael M. ; Lopez-Alascio, Blanca ; Nicolas, ClaireBeyond the Gap: How Countries Can Afford the Infrastructure They Need while Protecting the Planet aims to shift the debate regarding investment needs away from a simple focus on spending more and toward a focus on spending better on the right objectives, using relevant metrics. It does so by offering a careful and systematic approach to estimating the funding needs to close the service gaps in water and sanitation, transportation, electricity, irrigation, and flood protection. Exploring thousands of scenarios, this report finds that funding needs depend on the service goals and policy choices of low- and middle-income countries and could range anywhere from 2 percent to 8 percent of GDP per year by 2030. Beyond the Gap also identifies a policy mix that will enable countries to achieve key international goals—universal access to water, sanitation, and electricity; greater mobility; improved food security; better protection from floods; and eventual full decarbonization—while limiting spending on new infrastructure to 4.5 percent of GDP per year. Importantly, the exploration of thousands of scenarios shows that infrastructure investment paths compatible with full decarbonization in the second half of the century need not cost more than more-polluting alternatives. Investment needs remain at 2 percent to 8 percent of GDP even when only the decarbonized scenarios are examined. The actual amount depends on the quality and quantity of services targeted, the timing of investments, construction costs, and complementary policies. Finally, investing in infrastructure is not enough; maintaining it also matters. Improving services requires much more than capital expenditure. Ensuring a steady flow of resources for operations and maintenance is a necessary condition for success. Good maintenance also generates substantial savings by reducing the total life-cycle cost of transport and water and sanitation infrastructure by more than 50 percent.