A HEDONIC ANALYSIS OF PRIVATE HUNTING LAND ATTRIBUTES USING AN ALTERNATIVE FUNCTIONAL FORM

A hedonic framework is used to analyze selected attributes of Louisiana deer hunting leases that are hypothesized to be significant contributors to lease value. The flexible Box-Cox functional form is used in contrast to the often utilized linear regression specification. Additionally, the hypothesis of regional differences in slope coefficients of lease attributes is addressed. Results indicate that hunters in the two analyzed regions value lease attributes and services differently.Land Economics/Use,

QUALITY AS A LATENT VARIABLE IN RECREATION ACCESS ANALYSIS

Recreation trends indicating an increasing demand for quality recreation experiences suggest the need for special consideration of quality in analysis of fee access recreation. By viewing quality as a subjective latent variable, this paper uses a simultaneous equation framework to consider the use of subjective versus objective appraisals of quality in fee-based recreation access analysis.Resource /Energy Economics and Policy,

Whole genome sequencing to investigate the emergence of clonal complex 23 Neisseria meningitidis serogroup Y disease in the United States

In the United States, serogroup Y, ST-23 clonal complex Neisseria meningitidis was responsible for an increase in meningococcal disease incidence during the 1990s. This increase was accompanied by antigenic shift of three outer membrane proteins, with a decrease in the population that predominated in the early 1990s as a different population emerged later in that decade. To understand factors that may have been responsible for the emergence of serogroup Y disease, we used whole genome pyrosequencing to investigate genetic differences between isolates from early and late N. meningitidis populations, obtained from meningococcal disease cases in Maryland in the 1990s. The genomes of isolates from the early and late populations were highly similar, with 1231 of 1776 shared genes exhibiting 100% amino acid identity and an average πN = 0.0033 and average πS = 0.0216. However, differences were found in predicted proteins that affect pilin structure and antigen profile and in predicted proteins involved in iron acquisition and uptake. The observed changes are consistent with acquisition of new alleles through horizontal gene transfer. Changes in antigen profile due to the genetic differences found in this study likely allowed the late population to emerge due to escape from population immunity. These findings may predict which antigenic factors are important in the cyclic epidemiology of meningococcal disease

Le lactate: sa cinétique, son métabolisme, ses relations avec la performance et ses controverses

La somme de travaux dévolus à l’étude du lactate, de sa cinétique pendant l’exercice (et/ou la récupération), de son implication (ou non) dans la fatigue et de son utilité pour le contrôle de l’entraînement est extraordinaire. Pourtant, le lactate reste au centre de nombreuses controverses, étroitement liées aux concepts et aux méthodologies utilisés. Le principal objectif du présent article est de dresser une rapide revue de question (à mille lieues d’être exhaustive) sur le lactate et son métabolisme, et de tenter, non pas d’apporter des réponses, mais de pointer les éventuels discussions/points de désaccord (toujours) en cours. Les controverses dont il est l’origine seront en filigrane tout au long de ce document

A HEDONIC ANALYSIS OF PRIVATE HUNTING LAND ATTRIBUTES USING AN ALTERNATIVE FUNCTIONAL FORM

A hedonic framework is used to analyze selected attributes of Louisiana deer hunting leases that are hypothesized to be significant contributors to lease value. The flexible Box-Cox functional form is used in contrast to the often utilized linear regression specification. Additionally, the hypothesis of regional differences in slope coefficients of lease attributes is addressed. Results indicate that hunters in the two analyzed regions value lease attributes and services differently

Cost-effectiveness analysis and health care resource allocation: decision rules under variable returns to scale

We argue that health programs are administered in settings that often violate the frequently stated assumption of constant returns to scale in the provision of health services. Three types of returns to scale are identified from the general economic literature: returns to scale with respect to population, effectiveness, and quality. We show that decision rules based on incremental cost-effectiveness ratios or cost-benefit tests are not optimal if returns to scale are not constant. We derive the optimal decision rules under variable returns to scale using optimization techniques, and employ several examples to illustrate the concepts and methods. Published in 2003 by John Wiley & Sons, Ltd.