MARGINAL COMMODITY TAX REFORMS: A SURVEY

Abstract.  As noted 30 years ago by Martin Feldstein, optimal taxes may be useless for practical purposes and emphasis should instead be placed on the possibility of enhancing welfare by reforming existing tax rates. In this perspective, marginal commodity tax reforms are gaining increasing attention due to political and economic constraints on large reforms of direct (or indirect) taxation. In this paper, we summarize the main features and results of the literature on marginal commodity tax reforms pioneered by Ahmad and Stern, further developed by Yitzhaki and Thirsk and recently reinterpreted by Makdissi and Wodon. We establish new links to other fields of research, namely the literature on the use of equivalence scales and on poverty measurement. We also critically examine some issues associated with the implementation of marginal tax reforms with special reference to the calculation of welfare weights and revenue effects. Finally, we suggest directions for future research on poverty-reducing commodity tax reforms.     

广义Stackelberg市场上企业横向兼并获利性研究

基于广义Stackelberg寡头垄断市场,研究企业横向兼并的获利性和社会福利问题。结果表明,一个领头企业与一个跟随企业之间总是存在兼并动机,而领头企业之间很少存在兼并动机;当边际生产成本的差异程度较大时,两个跟随企业之间总是存在兼并动机;兼并导致的企业利润增加是以社会福利下降为代价的。     

GAME THEORETIC MODELS OF MIXED OLIGOPOLY

Abstract. In this paper we review various models that have been proposed for the study of mixed oligopoly, that is markets in which private and public firm compete on equal basis using only market instruments.     

THE APPLICABILITY OF THE TRADITIONAL THEORY OF ECONOMIC POLICY

Abstract. The traditional theory of economic policy requires targets, instruments, an empirical economic model, and a social welfare or criterion function to be specified in order to derive the optimal economic policy. Empirical studies of reaction functions suggest that economic policy is carried out in some systematic manner, subject to interference from political factors. This survey addresses the problems of specifying, estimating and applying an economic model when economic policy is following a path specified by a reaction function. Attention is paid to rational expectations, the Lucas'critique, and the policy neutrality proposition. Lack of knowledge of the policy maker's objective function poses the most serious difficulty when applying the theory of economic policy. Various methods of determining this function are reviewed, and the possibility that policy makers might be satisficing is discussed. The role played by political factors is considered in the light of the public choice literature.     

A PATCHWORK SAFETY NET: A SURVEY OF CLIOMETRIC STUDIES OF INCOME MAINTENANCE PROGRAMS IN THE UNITED STATES IN THE FIRST HALF OF THE TWENTIETH CENTURY

Abstract Social welfare programs in the USA are designed to serve as safety nets for people in hard times, in contrast with the universal approach found in many other developed western nations. In a survey of cliometric studies of social welfare programs in the USA, we examine the variation in the safety net in the USA across states in the 20th century, the determinants of the variation and its impact on socioeconomic outcomes. The USA has always displayed substantial variation in the extent of the safety net because the features of most public social welfare programs have been and currently are determined by local and state governments, even after the federal government became involved in the 1930s. Differences across states persist strongly for typically a decade, although the persistence weakens with time, and there are some periods when federal intervention led to a re‐ordering. The rankings of state benefits differ from program to program, and economic and political factors have different weights in determining benefit levels in panel data estimation of their effects. Variation in benefits across programs during the early 1900s had significant impact on labour markets, economic activity, family formation, death rates and crime.