This paper provides new evidence of the macroeconomic effects of public investment in advanced economies. Using public investment forecast errors to identify the causal effect of government investment in a sample of 17 OECD economies since 1985 and model simulations, the paper finds that increased public investment raises output, both in the short term and in the long term, crowds in private investment, and reduces unemployment. Several factors shape the macroeconomic effects of public investment. When there is economic slack and monetary accommodation, demand effects are stronger, and the public-debt-to-GDP ratio may actually decline. Public investment is also more effective in boosting output in countries with higher public investment efficiency and when it is financed by issuing debt.

This paper introduces a new index that captures the institutional environment underpinning public investment management across four different stages: project appraisal, selection, implementation, and evaluation. Covering 71 countries, including 40 low-income countries, the index allows for benchmarking across regions and country groups and for nuanced policy-relevant analysis and identification of specific areas where reform efforts could be prioritized. Potential research venues are outlined.

Public investment, and particularly infrastructure investment, is important for sustainable economic growth and development as well as public service provision. However, it is also vulnerable to capture and corruption.

Why should people - and economies - save? This book on the savings problem in Latin America and the Caribbean suggests that, while saving to survive the bad times is important, saving to thrive in the good times is what really counts. People must save to invest in health and education, live productive and fulfilling lives, and make the most of their retirement years. Firms must save to grow their enterprises, employ more workers in better jobs, and produce quality goods. Governments must save to build the infrastructure required by a productive economy, provide quality services to their citizens, and assure their senior citizens a dignified, worry-free retirement. In short, countries must save not for the proverbial rainy day, but for a sunny day - a time when everyone can bask in the benefits of growth, prosperity, and well-being. This book is open access under a CC BY-NC-ND 3.0 IGO license.

Public investment is likely to be an important component of any postcrisis recovery program. As countries work to ensure a smart, green, fair recovery, investing in modern, resilient, and efficient infrastructure assets will be key. This How to Note discusses how countries should manage public investments to recover from the COVID-19 pandemic and similar crises. It provides countries with guidance on making efficient use of public investment to support economic recovery on three different capacity levels: basic, medium, and advanced.

Investment in infrastructure can be a driving force of the economic recovery in the aftermath of the COVID-19 pandemic in the context of shrinking fiscal space. Public-private partnerships (PPP) bring a promise of efficiency when carefully designed and managed, to avoid creating unnecessary fiscal risks. But fiscal illusions prevent an understanding the sources of fiscal risks, which arise in all infrastructure projects, and that in PPPs present specific characteristics that need to be addressed. PPP contracts are also affected by implicit fiscal risks when they are poorly designed, particularly when a government signs a PPP contract for a project with no financial sustainability. This paper reviews the advantages and inconveniences of PPPs, discusses the fiscal illusions affecting them, identifies a diversity of fiscal risks, and presents the essentials of PPP fiscal risk management.

International cooperation has never been more needed, but the current system of "aid" is outdated and ineffective. The Future of Aid calls for a wholesale restructuring of the aid project, a totally new approach fit for the challenges of the 21st century: Global Public Investment. Across the world, billions of people are struggling to get by in unequal and unsustainable societies, and international public finance, which should be part of the answer, is woefully deficient. Engagingly written by a well-known expert in the field, The Future of Aid calls for a series of paradigm shifts. From a narrow focus on poverty to a broader attack on inequality and sustainability. From seeing international public money as a temporary last resort, to valuing it as a permanent force for good. From North-South transfers to a collective effort, with all paying in and all benefitting. From outdated post-colonial institutions to representative decision-making. From the othering and patronising language of "foreign aid", to the empowering concept of Global Public Investment. Ten years ago, in The Trouble with Aid, Jonathan Glennie highlighted the dangers of aid dependency and the importance of looking beyond aid. Now he calls for a revolution in the way that we think about the role of public money to back up our ambitious global objectives. In the wake of the COVID-19 crisis, it is time for a new era of internationalism.