Z. Emel Öztürk

Bio: Z. Emel Öztürk is an academic researcher from Tilburg University. The author has contributed to research in topics: Redistribution (cultural anthropology) & Consistency (statistics). The author has an hindex of 3, co-authored 6 publications receiving 16 citations. Previous affiliations of Z. Emel Öztürk include University of Glasgow.

Measurement of inequality of opportunity: A normative approach

Abstract: We develop a normative approach to the measurement of inequality of opportunity. That is, we measure inequality of opportunity by the welfare gain obtained in moving from the actual income distribution to the optimal income distribution of the total available income. Our study brings together the main approaches in the literature: we axiomatically characterize social welfare functions, we obtain prominent allocation rules as their optima, and we derive familiar classes of inequality of opportunity measures. Our analysis captures moreover the key philosophical distinctions in the literature: ex post versus ex ante compensation, and liberal versus utilitarian reward.

An axiomatic approach to the measurement of envy

Abstract: We characterize a class of envy-as-inequity measures. There are three key axioms. Decomposability requires that overall envy is the sum of the envy within and between subgroups. The other two axioms deal with the two-individual setting and specify how the envy measure should react to simple changes in the individuals’ commodity bundles. The characterized class measures how much one individual envies another individual by the relative utility difference (using the envious’ utility function) between the bundle of the envied and the bundle of the envious, where the utility function that must be used to represent the ordinal preferences is the ‘ray’ utility function. The class measures overall envy by the sum of these (transformed) relative utility differences. We discuss our results in the light of previous contributions to envy measurement and multidimensional inequality measurement.

Consistency of scoring rules: a reinvestigation of composition-consistency

Abstract: We consider a collective choice problem in which the number of alternatives and the number of voters vary. Two fundamental axioms of consistency in such a setting, reinforcement and composition-consistency, are incompatible. We first observe that the latter implies four conditions each of which can be formulated as a consistency axiom on its own right. We find that two of these conditions are compatible with reinforcement. In fact, one of these, called composition-consistency with respect to non-clone winners, turns out to characterize a class of scoring rules which contains the Plurality rule. When combined with a requirement of monotonicity, composition-consistency with respect to non-clone winners uniquely characterizes the Plurality rule. A second implication of composition-consistency leads to a class of scoring rules that always select a Plurality winner when combined with monotonicity.

Equality and responsibility: Ex ante and ex post redistribution mechanisms

Abstract: We study redistribution in a setting where individual responsibility and circumstance characteristics determine pre-tax income. We distinguish between ex ante and ex post versions of the key principles of compensation and reward. Furthermore, we distinguish between absolute and relative versions of reward. On the basis of these axioms, we provide characterizations of five familiar and two new redistribution mechanisms.

Measurement of inequality

Abstract: The analysis of inequality is placed in the context of recent developments in economics and statistics.

Enabling assessment of distributive justice through models for climate change planning: A review of recent advances and a research agenda

Abstract: Models for supporting climate adaptation and mitigation planning, mostly in the form of Integrated Assessment Models, are poorly equipped for aiding questions related to fairness of adaptation and mitigation strategies, because they often disregard distributional outcomes. When evaluating policies using such models, the costs and benefits are typically aggregated across all actors in the system, and over the entire planning horizon. While a policy may be beneficial when considering the aggregate outcome, it can be harmful to some people, somewhere, at some point in time. The practice of aggregating over all actors and over time thus gives rise to problems of justice; it could also exacerbate existing injustices. While the literature discusses some of these injustices in ad-hoc and case specific manner, a systematic approach for considering distributive justice in model-based climate change planning is lacking. This study aims to fill this gap by proposing 11 requirements that an Integrated Assessment Model should meet in order to enable the assessment of distributive justice in climate mitigation and adaptation policies. We derive the requirements from various ethical imperatives stemming from the theory of distributive justice. More specifically, we consider both intra-generational (among people within one generation) and intergenerational (between generations) distributive justice. We investigate to what extent the 11 requirements are being met in recent model-based climate planning studies, and highlight several directions for future research to advance the accounting for distributive justice in model-based support for climate change planning. This article is categorized under: Climate, Nature, and Ethics g Climate Change and Global Justice.

How Does Inequality Affect the Residents’ Subjective Well-Being: Inequality of Opportunity and Inequality of Effort

Abstract: Based on the Chinese General Social Survey database (2010–2015), this article explores the relationship between income inequality and residents’ subjective well-being from the perspective of inequality of opportunity and inequality of effort. We find that inequality of opportunity has a negative impact on subjective well-being in China, where inequality of effort has a positive impact. Our empirical results are robust for changing the inequality indicators. In the sub-sample studies, consistent conclusions are obtained in rural areas, whereas in urban areas only inequality of effort has a significant impact. The results of mechanism study show that inequality of opportunity decreases residents’ sense of fairness, and inequality of effort increases residents’ sense of fairness, thus affecting their subjective well-being. The results of this study provide a good response to the inconclusive research findings on the impact of income inequality on subjective well-being.

Measurement of inequality of opportunity: A normative approach

Abstract: We develop a normative approach to the measurement of inequality of opportunity. That is, we measure inequality of opportunity by the welfare gain obtained in moving from the actual income distribution to the optimal income distribution of the total available income. Our study brings together the main approaches in the literature: we axiomatically characterize social welfare functions, we obtain prominent allocation rules as their optima, and we derive familiar classes of inequality of opportunity measures. Our analysis captures moreover the key philosophical distinctions in the literature: ex post versus ex ante compensation, and liberal versus utilitarian reward.

The Law of International Watercourses

Abstract: This book is an authoritative guide to the rules of international law governing the navigational and non-navigational uses of international rivers, lakes, and groundwater. The continued growth of the world’s population places increasing demands on Earth’s finite supplies of fresh water. Because two or more States share many of the world’s most important drainage basins, competition for increasingly scarce fresh water resources will only increase. Agreements between the States sharing international watercourses are negotiated, and disputes over shared water are resolved, against the backdrop of the rules of international law governing the use of this precious resource. The basic legal rules governing the use of shared freshwater for purposes other than navigation are reflected in the 1997 UN Convention on the Law of the Non-Navigational Uses of International Watercourses. This book devotes a chapter to the 1997 Convention but also examines the factual and legal context in which the Convention should be understood, considers the more important rules of the Convention in some depth, and discusses specific issues that could not be addressed in a framework instrument of that kind. It reviews the major cases and controversies concerning international watercourses as a background against which to consider the basic substantive and procedural rights and obligations of States in the field. This new edition covers the implications of the 1997 Convention coming into force in August 2014, and the compatibility of the 1997 and 1992 Conventions.