Federal Reserve Independence in the Aftermath of the Financial Crisis: Should We Be Worried?

The extraordinary circumstances of the past few years have led to extraordinary responses by the Federal Reserve and other central banks. These ventures into uncharted waters have heightened political scrutiny to the point of raising concern about future independence. In discussing independence of the Federal Reserve, it is important to separate its regulatory and supervisory functions from its monetary policy function. It is the latter in which the question of independence is most important. History indicates that independent monetary policy has been a powerful deterrent to inflation. This paper outlines the threats to Federal Reserve independence, particularly as it exists from the unconventional policies that it pursued to mitigate the financial crisis. Economists have an important role in making the case that monetary policy remains independent.     

The Radiant World of John Virgo

John Virgo gave generously of himself and expected nothing in return. He inspired the same in others. The world has sadness as well as joy, but while he was here, he made it radiant.     

Modelling dependence using skew t copulas: Bayesian inference and applications

We construct a copula from the skew t distribution of Sahu et al. ( 2003 ). This copula can capture asymmetric and extreme dependence between variables, and is one of the few copulas that can do so and still be used in high dimensions effectively. However, it is difficult to estimate the copula model by maximum likelihood when the multivariate dimension is high, or when some or all of the marginal distributions are discrete‐valued, or when the parameters in the marginal distributions and copula are estimated jointly. We therefore propose a Bayesian approach that overcomes all these problems. The computations are undertaken using a Markov chain Monte Carlo simulation method which exploits the conditionally Gaussian representation of the skew t distribution. We employ the approach in two contemporary econometric studies. The first is the modelling of regional spot prices in the Australian electricity market. Here, we observe complex non‐Gaussian margins and nonlinear inter‐regional dependence. Accurate characterization of this dependence is important for the study of market integration and risk management purposes. The second is the modelling of ordinal exposure measures for 15 major websites. Dependence between websites is important when measuring the impact of multi‐site advertising campaigns. In both cases the skew t copula substantially outperforms symmetric elliptical copula alternatives, demonstrating that the skew t copula is a powerful modelling tool when coupled with Bayesian inference. Copyright © 2010 John Wiley & Sons, Ltd.     

Production theory,uncertain prices and investment portfolios

This paper examines the allocative decisions of a competitive firm where input and output prices are uncertain and where the capital asset pricing model prevails. The firm behaves much as a profit maximizer under certainty, except that certainty equivalent prices formally replace the known prices. These certainty equivalent prices are composed of the expected price, the covariance of the price with the market (a measure of systematic risk) and a measure of risk aversion in the economy. Both static and comparative static propositions emerge in a natural way as extensions of standard, competitive and profit maximizing behavior. In addition, the model contains both the certainty case and the risk-neutral case as limiting examples.     

Demographic transition among the Negev Beduin in Israel and its planning implications

The sedentarization of Beduin in Israel made it necessary for the authorities to channel the process into planned semi-urbanization. A forecast of future Beduin population size, however, did not consider the demographic transition and response theories within the process of change among the nomads. The present study demonstrates that the Beduin underwent a process of fertility increase before fertility decline, both of which were preceded by the process of mortality decline between the mid-1950s and the late-1970s. While mortality decline and fertility increase were the outcomes of economic growth, fertility decline is the outcome of social modernization. Both processes lead to decline in population growth rate. This reinterpretation of demographic processes has important implications for planning towns for the Beduin society in terms of improvement in their social well-being on their path from nomadism to semi-urbanization.     

Optimal use of futures markets when input and output prices are uncertain

The purpose of this paper is to extend the analysis of the use of futures markets by a competitive firm facing an uncertain market price for its output to the case where both input and output prices are uncertain.     

A Theoretical Inefficiency in the International Marketing of Tradable Global Warming Emission Permits

When the disutility of global pollution is measured in units of a numeraire good that is polluting in consumption, the marginal rates of substitution in consumption are generally weighted differently in each countrys calculation of marginal damages. In that case, it is inefficient to control global warming by tradable emission permits, which in theory trade at a unique international equilibrium price. This conclusion is derived from a model of Shibata (1996) in which consumption is pervasively polluting in global warming gases. Shibata dubiously based the inefficiency he discovered on the reciprocal external damages of global warming emissions rather than on the nullibicity he posed for a non-polluting numeraire good.JEL Classification Numbers: F02, Q4, Q25     

Local identification of ARMAX structures subject to nonlinear constraints

Summary We obtain necessary and sufficient conditions for the local identification of a simultaneous ARMAX structure whose parameters are subject to nonlinear constraints. A global identification condition is also obtained. The results generalize theWegge [1965] andRothenberg [1971] identification criteria for a classical simultaneous equations model.This paper is preliminary and confidential. Please do not quote its contents without the written permission of the author.