Recent estimates of the marginal cost of public funds differ substantially. Some studies argue that the efficiency cost of taxation counter the welfare gain connected to redistribution of income. Hence, the efficiency cost of taxation should not be included as a cost of public goods provision. Kleven and Kreiner (2006), however, argue that the cost of public goods provision may double in countries with a large welfare state due to exit from the labor market. This study shows that the cost of public goods provision should be increased with less than 15 percent when categorical transfers redistributed income even though taxation may lead to exit from the labor market.

Several studies show cases where the Samuelson rule holds, or where the marginal cost of public funds (MCF) equals one within optimized tax systems. The conditions for the original Samuelson rule to hold in these studies are quite restrictive, and MCF measures employed are not consistent with MCF measures employed within real-world cost-benefit tests. The aim of the present study is to remove such restrictive conditions, and to construct a MCF measure designed for real-world cost-benefit tests. The study shows that such a MCF exceeds one within optimized tax systems. Hence, the optimal supply of public goods is below the supply obtained by the Samuelson rule. The study further shows that income taxation below optimum requires an even higher MCF to prevent that public goods provision crowd out social security transfers with a higher marginal welfare gain.

Chapters include: "Income distribution and welfare programs", "State and local government expenditures" and "Health economics and private health insurance".

It is argued that taxation causes three kinds of deadweight losses and two types of direct costs. The deadweight losses arise from substitution, evasion, and avoidance activities while the direct costs are administrative and compliance costs. Some of these social costs tend to be discontinuous and/or nonconvex. Because most models of taxation ignore some components of the social costs of taxation, their conclusions cannot be of a general nature. An alternative approach to policy evaluation is to rely on a marginal efficiency cost of funds rule which can indicate appropriate directions of reforms. The paper discusses its merits, applicability, and limitations, as well as its relationship to other concepts.

This publication considers the range of financing options available for the design of cost-effective and equitable social welfare systems, giving a thorough analysis of their advantages and disadvantages and their financial and economic implications. Written by practitioners for practitioners, the book discusses the design and maintenance of national social protection systems that seek to ensure effective and efficient use of available resources at the community, national and international levels while supporting long-term economic development. The book explores theoretical and practical policy questions, as well as looking at the policy process that determines the affordable levels of and scope of social protection in a given country.

A unified treatment of the marginal cost of public funds, covering both its theoretical foundations and how the MCF concept can be used to analyze tax policy issues. The marginal cost of public funds (MCF) measures the loss incurred by society in raising additional revenues to finance government spending. The MCF has emerged as one of the most important concepts in public economics; it is a key component in evaluations of tax reforms, public expenditure programs, and other public policies. The Marginal Cost of Public Funds provides a unified treatment of the MCF, carefully developing its theoretical foundations in a variety of contexts and describing its application to a wide range of policies—from excise taxes in Thailand to public sector borrowing in Canada and the United States. The Marginal Cost of Public Funds develops the basic theory of the MCF within the framework of public economics and shows how it is related to the traditional measures of the efficiency loss from distortionary taxation. The MCF concept is then applied to the major sources of revenues for governments—sales and excise taxes, taxes on labor income, taxes on the return to capital, public sector borrowing, and intergovernmental grants. This book will be an essential reference for economists and public policy analysts both in and out of government. Exercises and recommendations for further reading at the end of each main chapter highlight its usefulness as a supplementary text in advanced undergraduate or graduate courses in public economics.