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The Price Shock Transmission during the 2007-2008 Commodity Bull Cycle: A Structural Vector Auto-Regression Approach to the "Chicken-or-Egg" Problem

Power, Gabriel J.; Vedenov, Dmitry V. - 2009

Commodity and energy prices have exhibited an unprecedented increase between October 2006 and July 2008, only to fall sharply during the last months of 2008. Many explanations have been offered to this phenomenon, including steadily increasing demand from China and India, large mandated...

Persistent link: https://www.econbiz.de/10009444738

Robust Statistical Tests for Detecting the Effects of Interspecific Competition on Ecological Communities

Ladau, Joshua - 2005

For seventy years ecologists have debated to what extent competition affects the composition of ecological communities. At one extreme, species have been proposed to assemble independently of each other, while at the other extreme, competition and other interspecific interactions have been...

Persistent link: https://www.econbiz.de/10009466183

A new hybrid method for bayesian network learning with dependency constraints

Schulte, Oliver; Frigo, Gustavo; Greiner, Russell; Luo, Wei - 2009

A Bayes net has qualitative and quantitative aspects: The qualitative aspect is its graphical structure that corresponds to correlations among the variables in the Bayes net. The quantitative aspects are the net parameters. This paper develops a hybrid criterion for learning Bayes net structures...

Persistent link: https://www.econbiz.de/10009448619

Modeling the spread of disease through a population

Lauren A. Meyers (contributor) - 2009

As disease spreads through a population, scientists want to know who gets sick, how bestto prevent a large outbreak, and if an epidemic may occur. For many years, mathematicians usedmodels to approximate answers to these questions; however, these older models used simplifyingassumptions about...

Persistent link: https://www.econbiz.de/10009429368

The two-dimensional Kolmogorov-Smirnov test

Lopes, R H C; Reid, I; Hobson, P R - 2007

computes inO(n2); Cooke’s test that computes in O(n2).We prove that Cooke’s algorithm runs in O(n2), contrary to his claims …

Persistent link: https://www.econbiz.de/10009465493

Bandwidth Selection for Local Linear Quantile Regression with Applications to Financial Market Data

Attar, Hoda E. El- - 2008

distribution. We generalize the iterative Plug-in algorithm for local linear quantile regression with double kernel smoothing in … section (4.5). In section (4.6), we present an iterative-Plug-in algorithm for the local linear quantile regression. In … section (4.7), we discuss the consistency and the asymptotic normality of the plug-in algorithm. In chapter 5, we apply the …

Persistent link: https://www.econbiz.de/10009471892

System-dynamics-based modeling of business simulation algorithms

Gold, Steven - 2005

Research on the internal algorithms used to model business simulations have focused on individual components of the business system. Yet the business environment is complex in nature, characterized by interdependencies and nonlinear relationships that require a systems approach if effective game...

Persistent link: https://www.econbiz.de/10009459196