Environmental economics addresses the issues that arise on the boundaries between economic systems and natural systems, such as pollution and natural resource de pletion and degradation. Like any other branch of applied economics, it has drawn its tools and techniques from the wide range already available in economics gener ally, selecting, adapting and extending these to meet its own particular requirements in its own particular context. Here, as elsewhere in economics, public policy analy sis requires quantitative assessments of the economic impact of different policy choices. Perhaps the most distinctive contribution of environmental economics has been the development of techniques for the economic valuation of environmental goods and services in the absence of markets for such goods and services, or in the presence of markets that are at best imperfect or incomplete. Nevertheless policy analysis still relies on one or another of three broad groups of methods used in eco nomics generally. One is project appraisal, which at the micro level provides an evaluation ofthe costs and benefits ofinvestment options to inform the choice among them, while at the macro level policy analysis rests either on computable general equilibrium (CGE) models or on economy-wide macroeconometric models. All models are simplifications, designed to focus attention on the important fea tures ofthe problem at hand, and neglecting other features that might for a different problem assume greater importance.

A country's economic policies significantly affect the performance of investment projects in the social sectors, especially education.

This supplement presents the analytical frameworks underlying the IMF’s staff’s enhanced policy analysis and advice to resource-rich developing countries (RRDCs). The proposed macro-fiscal models, which are applied to selected country or regional cases, are aimed at addressing questions regarding how to deal with resource revenue uncertainty and how to scale up spending within relevant frameworks that ensure fiscal and external sustainability while addressing absorptive capacity constraints. The country applications confirm the importance attached by both IMF staff and country authorities of using the appropriate macro-fiscal frameworks to address the specific challenges faced by RRDCs.

Some recent trends in macroeconomic theory and practice; A critique of Keynesian macroeconomics; The basic neoclassical model; Extension of the neoclassical model; Long term policy analysis; The rational expectations hypothesis; Macroeconomic policy and rational expectations; Theory and practice.

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 books presents general principles and methodologies of quantitative risk analysis; provides theory and practice of how to evaluate health, transport and education projects and describes how to assess the environmental impact of projects. It looks at how the tools of cost benefit analysis can be applied from the point of view of the private sector, public sector, bankers, and the country as a whole. It encourages analysts to answer a number of key questions that are likely to increase success rather than simply describing techniques. This book as aimed at all concerned with resource allocation and is presented in an accessible fashion. It is required reading at World bank Institute courses.