Serious research into the causes and implications of an aging population is a relatively recent phenomenon. Though several relevant issues of aging havereceived considerable attention in public and political discussions (especially in European countries and in Japan), the economics profession is somewhat lacking behind. This is particularly true for thetheoretical underpinnings of the economics of population aging. Until now, the aging-debate is primarily led by institutionalists. The present book with its analytical and econometric studies on fiscal implications of population aging is an important step in the process of theoretical analysis of aging. It is of interest both for population economists (and demographers) and for public economists - providing a bridge between these areas of research.

Hans-Werner Sinn, Munich, West Germany This book contains 15 papers presented at a conference in Neresheim, West Ger many, in June 1986. The articles were selected by anonymous referees and most of them have undergone substantial revisions since their presentation. The common topic is measurement of welfare, both from efficiency and from equity perspectives. For many economists, welfare is a diffuse, arbitrary and am biguous concept. The papers collected in this book show that this view is not justified. Though not beyond all doubt, welfare theory today is crisp and clear, offering fairly straightforward measuring concepts. It even comes up with numbers that measure society's advantage or disadvantage from specific policy options in monetary units. Politicians get something they can intuitively understand and argue with, and they do not have to be afraid that all this is metaphysics or the result of the scientist's personal value judgements. Some economists, whom I would classify as belonging to the "everything is optimal" school, would claim that providing politicians with numerical welfare measures is superfluous or even dangerous. The world is as it is, and any attempt to give policy advice can only make things worse. I do not share this view. There are good policies and there are bad ones, but it may not be easy to distinguish between them. There is a role for consulting politicians, Dr."

This volume presents papers which were given at a conference of the Liberty Fund, Washington, co-sponsored by the Carl-Menger Institute, Vienna. The conference took place in Vienna in January 1988. All papers were subject to a refereeing process; some of them had to be revised very extensively. The economics of progressive taxation have been a research topic ever since economists have dealt with the economic role of the state. Old puzzles are the best: the theoretical underpinning of progressivity still is not fully convincing, even after 200 years of economic research. In the present volume we succeeded in publishing some contributions of outstanding economists which present their visions of the topic. Niskanen distinguishes two types of contributions of public choice analysis to understanding and evaluating the tax and transfer system in modern economics: the positive analysis, which examines the issue of how a tax and transfer system would look if it were established by a government subject to majority rule; . and the normative analysis, which tries to discern an optimal system of taxes and transfers. In the normative case the author distinguishes between the "libertarian perspective", in which each person has full rights to any property that he has acquired legally and in which transfers are determined entirely by the preferences of the donors, and the so-called "constitutional perspective" , in which each person elects the rules affecting taxes without knowledge of his position in the post constitutional distribution.

The trend towards privatization has been particularly strong in the 1980s and 1990s. In the UK, some of the most important public utilities such as telecommunications, gas, and electricity have been privatized. Following unification, Germany is having to privatize an entire economy. This book examines the form of privatization, a topic which has not previously been subjected to rigorous economic analysis, and provides a comprehensive and thorough survey of arguments both for and against it. Both positive and welfare-economic approaches to deal with the complex problems of the transition from public to private ownership are discussed. The author also examines the central issues of privatization such as why efficiency increases can be expected as a result of privatization, whether full privatization coupled with subsequent regulation is better than partial privatization with the government regulating from within the firm. He also looks at the role of trade unions in the privatization process.