We introduce a method of accurately and efficiently modeling a large population of participants in a financial market. Each participant is modeled as having an internal preference state affected by the continual arrival of exogenous information and by the behavior of others. In order to describe a community of traders, we introduce a population equation that is derived rigorously from the under...

Population dynamics that evolve in a radial symmetric geometry are investigated. The nonlinear reaction-diffusion model, which depends on population density, is employed as the governing equation for this system. The approximate analytical solution to this equation is found. It shows that the population density evolves from the initial state and propagates in a traveling-wave-like manner for a ...

This paper deals with an endogenous growth model with vintage capital and, more precisely, with the AK model proposed in [R. Boucekkine, O. Licandro, L.A. Puch, F. del Rio, Vintage capital and the dynamics of the AK model, J. Econ. Theory 120 (1) (2005) 39–72]. In endogenous growth models the introduction of vintage capital allows to explain some growth facts but strongly increases the mathemat...

We present deep narrow-band ( = 5390 A, = 77 A) and multi-color observations of the Hubble Deep Field and the Hawaii Deep Field SSA22 obtained with the LRIS instrument at the Keck II 10-m telescope. It is shown that there is a substantial population of galaxies at z 3:4 which can be selected by Ly emission. Comparison with color-selected samples shows that the samples selected with these di ere...

PARTICULARITIES OF THE ETIOLOGICAL STRUCTURE OF NOSOCOMIAL INFECTIONS IN HOSPITALS OF ORTHOPEDICS AND TRAUMATOLOGY PROFILE (Abstract): Determination of etiological structure of septic-purulent nosocomial infections (SPNI) in hospitals of orthopedics and traumatology profile. Materials and methods: there were analyzed 2013 strains of microorganisms isolated from the patients with SPNI. Results: ...

Evaluating an agent’s performance in a stochastic setting is necessary for agent development, scientific evaluation, and competitions. Traditionally, evaluation is done using Monte Carlo estimation; the magnitude of the stochasticity in the domain or the high cost of sampling, however, can often prevent the approach from resulting in statistically significant conclusions. Recently, an advantage...

In this study, the authors scrutinize the intergenerational transmission of book reading and television viewing behaviors. They examine long-term effects of parents’ social status, parental media example, and media guidance activities during one’s childhood on adult media tastes. Data are employed from the Family Survey of the Dutch Population. By estimating structural equation models, the auth...

We present deep narrow-band (λ = 5390 Å, ∆λ = 77 Å) and multi-color observations of the Hubble Deep Field and the Hawaii Deep Field SSA22 obtained with the LRIS instrument at the Keck II 10-m telescope. It is shown that there is a substantial population of galaxies at z ∼ 3.4 which can be selected by Lyα emission. Comparison with color-selected samples shows that the samples selected with these...

To collect qualitative data on the investigation practices of environmental health specialists with respect to foodborne illness outbreaks, the authors convened six focus groups of randomly selected specialists working in public health agencies in eight states. Participants discussed their investigation activities, methods used to identify contributing factors, success in identifying contributi...

It is well known that measurement error in observable variables induces bias in estimates in standard regression analysis and that structural equation models (SEM) are a typical solution to this problem. Often, multiple indicator equations are subsumed as part of the SEM model – allowing for consistent estimation of the relevant regression parameters. In many instances, however, embedding the m...