Amartya Sen

Bio: Amartya Sen is an academic researcher from Harvard University. The author has contributed to research in topics: Poverty & Human rights. The author has an hindex of 149, co-authored 689 publications receiving 141907 citations. Previous affiliations of Amartya Sen include Trinity College, Dublin & University of Chicago.

Well-Being, Agency and Freedom the Dewey Lectures 1984 *

Abstract: The main aim of Dewey lectures is to explore a moral approach that sees persons from two different perspectives: well-being and agency. Both the "well-being aspect" and the "agency aspect" of persons have their own relevance in the assessment of states and actions. A second objective is to examine a set of metaethical issues, making use of an "informational" approach to moral analysis which focuses on the admissibility and use of different types of information in moral valuation. Informational analysis can be used to bring out the content, scope, and limitations of different moral principles. A few examples may help to illustrate the diversity of ways in which informational constraints may be used through the specification of invariance requirements. Authorship invariance does have some claims to being a reasonable requirement of moral evaluation. The possibility of combining position relativity with authorship invariance is also the reason why positionality of moral valuation is perfectly consistent with objectivity of moral values.

Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification

Abstract: We consider the scenario emerging from the dynamics of a generalized Born-Infeld theory. The equation of state describing this system is given in terms of the energy density $\ensuremath{\rho}$ and pressure p by the relationship $p=\ensuremath{-}A/{\ensuremath{\rho}}^{\ensuremath{\alpha}},$ where A is a positive constant and $0l\ensuremath{\alpha}l~1.$ We discuss the conditions under which homogeneity arises and show that this equation of state describes the evolution of a universe evolving from a phase dominated by nonrelativistic matter to a phase dominated by a cosmological constant via an intermediate period where the effective equation of state is given by $p=\ensuremath{\alpha}\ensuremath{\rho}.$

Hunger and Public Action

Abstract: Part 1 Hunger in the modern world: entitlement and deprivation nutrition and capability society, class and gender. Part 2 Famines: famines and social response markets, famines and intervention strategies of entitlement protection experiences and lessons. Part 3 Undernutrition and deprivation: production entitlements and nutrition economic growth and public support China and India experiences of direct support. Part 4 Hunger and public action: economy and society the State and the public.

On Economic Inequality

Abstract: First published in 1973, this book presents a systematic treatment of the conceptual framework as well as the practical problems of measurement of inequality. Alternative approaches are evaluated in terms of their philosophical assumptions, economic content, and statistical requirements. In a new introduction, Amartya Sen, jointly with James Foster, critically surveys the literature that followed the publication of this book, and also evaluates the main analytical issues in the appraisal of economic inequality and poverty.

On Happiness and Human Potentials: A Review of Research on Hedonic and Eudaimonic Well-Being

Abstract: ▪ Abstract Well-being is a complex construct that concerns optimal experience and functioning. Current research on well-being has been derived from two general perspectives: the hedonic approach, which focuses on happiness and defines well-being in terms of pleasure attainment and pain avoidance; and the eudaimonic approach, which focuses on meaning and self-realization and defines well-being in terms of the degree to which a person is fully functioning. These two views have given rise to different research foci and a body of knowledge that is in some areas divergent and in others complementary. New methodological developments concerning multilevel modeling and construct comparisons are also allowing researchers to formulate new questions for the field. This review considers research from both perspectives concerning the nature of well-being, its antecedents, and its stability across time and culture.

Agricultural sustainability and intensive production practices

Abstract: A doubling in global food demand projected for the next 50 years poses huge challenges for the sustainability both of food production and of terrestrial and aquatic ecosystems and the services they provide to society. Agriculturalists are the principal managers of global useable lands and will shape, perhaps irreversibly, the surface of the Earth in the coming decades. New incentives and policies for ensuring the sustainability of agriculture and ecosystem services will be crucial if we are to meet the demands of improving yields without compromising environmental integrity or public health.

Dynamics of dark energy

Abstract: We review in detail a number of approaches that have been adopted to try and explain the remarkable observation of our accelerating universe. In particular we discuss the arguments for and recent progress made towards understanding the nature of dark energy. We review the observational evidence for the current accelerated expansion of the universe and present a number of dark energy models in addition to the conventional cosmological constant, paying particular attention to scalar field models such as quintessence, K-essence, tachyon, phantom and dilatonic models. The importance of cosmological scaling solutions is emphasized when studying the dynamical system of scalar fields including coupled dark energy. We study the evolution of cosmological perturbations allowing us to confront them with the observation of the Cosmic Microwave Background and Large Scale Structure and demonstrate how it is possible in principle to reconstruct the equation of state of dark energy by also using Supernovae Ia observational data. We also discuss in detail the nature of tracking solutions in cosmology, particle physics and braneworld models of dark energy, the nature of possible future singularities, the effect of higher order curvature terms to avoid a Big Rip singularity, and approaches to modifying gravity which leads to a late-time accelerated expansion without recourse to a new form of dark energy.