Dynamical instabilities in density-dependent hadronic relativistic models

Unstable modes in asymmetric nuclear matter (ANM) at subsaturation densities are studied in the framework of relativistic mean-field density-dependent hadron models. The size of the instabilities that drive the system are calculated and a comparison with results obtained within the non-linear Walecka model is presented. The distillation and anti-distillation effects are discussed.Comment: 8 pages, 8 Postscript figures. Submitted for publication in Phys. Rev.

Local Physical Coodinates from Symplectic Projector Method

The basic arguments underlying the symplectic projector method are presented. By this method, local free coordinates on the constrait surface can be obtained for a broader class of constrained systems. Some interesting examples are analyzed.Comment: 8 page

Grain Futures Markets: What Have They Learned?

Taken together, studies that examine how well commodity futures markets perform find that risk premiums are common—and so unbiasedness is not—and markets are not uniformly efficient across commodities or forecast horizons. This large body of research sheds important light on whether and to what extent commodity-futures markets forecast optimally future spot prices and, so, enable commercials to manage price risk by effectively parsing out much of it to speculators, a process that improves the total welfare of an economy with competitive but otherwise-incomplete markets. Nevertheless, that speculators can, in effect, improve welfare in this way has done little to quell popular hostilities toward futures markets. Such hostilities—and, in particular, those directed at speculators—in North America date to the inception of these markets in the nineteenth century, and have contributed to the unflattering depiction of the early futures exchange as an inchoate and poorly managed institution that initially served only the (illegitimate) aspirations of gamblers, an original-sin creation narrative that surely compromises the legitimacy of modern futures markets. Unfortunately, economists’ understanding of early commodity-futures markets is particularly fragmented—the extant literature focuses almost exclusively on the post-World War II era—and, as such, claims regarding the performance of early futures markets remain largely unsubstantiated in any quantitatively measurable sense. In this paper, I test and compare the efficiency properties of wheat, corn, and oats futures prices on the Chicago Board of Trade (CBT) from 1880 to 1890 and from 1997 to 2007. I demonstrate that, on balance, these nascent nineteenth-century grain-futures markets were, like their contemporary counterparts in this case, mostly efficient. As such, these results support the claims of early proponents of futures markets who argued that the development of the futures exchange was shaped primarily by commercial interests who sought to mitigate price risk.commodities futures markets, unbiasedness, efficiency, Chicago Board of Trade, Agribusiness, Agricultural and Food Policy, Agricultural Finance, Demand and Price Analysis, Farm Management, Financial Economics, Marketing, Research Methods/ Statistical Methods, Risk and Uncertainty,

The Third Moment in Law and Development Theory and the Emergence of a New Critical Practice

The study of the relationship between law and economic development goes back at least to the nineteenth century. It is a question that attracted the attention of classical thinkers like Marx and Weber. And there were some early efforts to craft policy in this area; for example, under the Raj, some English Utilitarians tried to put Jeremy Bentham’s ideas about law and economic progress into practice in India. But it was only after World War II that systematic and organized efforts to reform legal systems became part of the practice of international development agencies. Initially, development agencies turned to law as an instrument for state policy aimed at generating economic growth. Starting in the 1980s, interest in the role of law in economic development grew, but it was an interest in law more as a framework for market activity than as an instrument of state power. This book argues that, starting in the mid-1990s, development practitioners approached law in a fundamentally new way – as a correction for market failures and as a constitutive part of “development” itself. As a result, “the rule of law” has become significant not only as a tool of development policy, but as an objective for development policy in its own right. This book charts the history of this growing interest in the legal field, explores the shifting rationales behind development policy initiatives, and explores in detail the newest – and most surprising – of these rationales. To do that, we trace the history of a body of ideas about law and economic development that have been employed not just by academics but also by development practitioners responsible for allocating funds and designing projects. In this introduction, we refer to that body of ideas as law and development doctrine. Although this doctrine has academic roots in economic and legal theory, it is a practical working tool of development agencies