The second Erice course in the school of Particle-Astrophysics was held in May, 1988. The topic choosen was Dark Matter. This is one of the most exciting top- ics at the interface of particle physics and astrophysics. It is developing rapidly now due to a coming together not only of the theoretical concepts from the early universe with the theoretical concepts of galaxy formation, but also the coming to- gether of the theorists, experimentalists and observers. It is with Dark Matter, the combined interrelated topics of galaxy formation and the generation of large scale structure that we see a...

G. Galeotti* and M. Marrelli** *Universita di Perugia **Universita di Napoli 1. The economic analysis of optimal taxation has permitted considerable steps to be taken towards the understanding of a number of problems: the appropriate degree of progression, the balance between different taxes, the equity-efficiency trade-off etc .. Though at times considered as abstract and of little use in policy design, the issues it addresses are real ones and very much on the agenda of many countries. As usual in scientific debate, criticisms have contributed to the correct understanding of the theoretical...

I. Until about a dozen years ago, the economic analysis of the relationship between political preferences and political demands was a rather straightforward, if dull, subject. The most common assumption was that the only political instrument available to citizens was the vote. Given this assumption, the analyst could express the outcome of the voting process in one of two ways. One possibility was to make the heroic assumptions necessary to obtain the median voter theorem, in which case, the political demands of the citizenry are simply the preferences of the median voter. The alternative was...

This volume deals with the problems associated with the design and reform of the tax system. The traditional theory of optimal taxation and reform ignores some important, real-world constraints, such as transaction and administration costs, demographic changes and, in general, dynamic features and political or institutional constraints. Design and Reform of Taxation Policy focuses attention on some of these critical issues. The book is divided into two sections: the first deals mainly with theoretical issues, while the second tackles the problem of implementation of tax reforms with the main...

I. Until about a dozen years ago, the economic analysis of the relationship between political preferences and political demands was a rather straightforward, if dull, subject. The most common assumption was that the only political instrument available to citizens was the vote. Given this assumption, the analyst could express the outcome of the voting process in one of two ways. One possibility was to make the heroic assumptions necessary to obtain the median voter theorem, in which case, the political demands of the citizenry are simply the preferences of the median voter. The alternative was...

I. The concept of competition played a central role in the very first attempts to apply the tools of economics to the analysis of politics. Adopting Hotelling's (1929) industrial organization model of imperfect competition in markets in which space has a predominant role, Downs (1957), following on some perceptive insights of Schumpeter (1942), was able to formulate a model of electoral competition in which political parties, seeking the support of citizens, compete against each other in offering policies designed to elicit their vote. Downs' model and the numerous variants to which it gave...

P. de Bernardis, S. Masi , G. Moreno Dipartimento di Fisica, Universita' "La Sapienza" 00184 Roma Italy ABSTRACT. Anisotropy measurement techniques and results are reviewed, with special attention given to experimental problems. The cosmological relevance of the dipole anisotropy, the only anisotropy truly detected in the Cosmic Background Radiation, is discussed. 1. INTRODUCTION Anisotropy of the Cosmic Background Radiation at 2.7 K (CBR hereafter) is a cosmological topic with a wide range of applications. In order to define anisotropy let us consider fig. 1 a, where the celestial sphere is...

The second Erice course in the school of Particle-Astrophysics was held in May, 1988. The topic choosen was Dark Matter. This is one of the most exciting top ics at the interface of particle physics and astrophysics. It is developing rapidly now due to a coming together not only of the theoretical concepts from the early universe with the theoretical concepts of galaxy formation, but also the coming to gether of the theorists, experimentalists and observers. It is with Dark Matter, the combined interrelated topics of galaxy formation and the generation of large scale structure that we see a...