Based on a classical financial market model different model variants known from the literature are discussed and analyzed, each focussing on modeling financial markets as a nonlinear dynamic system by introducing the formation of (heterogeneous) beliefs about future asset prices into the model...

We study model selection strategies based on penalized empirical loss minimization. We point out a tight relationship between error estimation and data-based complexity penalization: any good error estimate may be converted into a data-based penalty function and the performance of the estimate...

To overcome the curse of dimensionality, dimension reduction is important andnecessary for understanding the underlying phenomena in a variety of fields.Dimension reduction is the transformation of high-dimensional data into ameaningful representation in the low-dimensional space. It can be...

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...

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...

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...

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...

In this paper we describe our use of the STAMP architecture to analyse the C. difficile infection outbreaks which occurred at the Maidstone and Tunbridge Wells NHS trust. Background data from other outbreaks in the UK (e.g., at Stoke Mandeville NHS trust) were also used to build STAMP models....

University of Minnesota Ph.D. dissertation. July 2009. Major: Business Administration. Advisors: Dr. Karen Donohue and Dr. Rachna Shah. 1 computer file (PDF); xi, 196 pages, appendices 1-4.

This paper explores the interconnections between two of Herbert Simon's key concepts, bounded rationality and decomposability, and show how this unity provides the starting point for merging cognitively focused approaches to behavioral economics with evolutionary/institutional economics into a...