Hypothesis testing in hedonic price estimation - On the selection of independent variables
Problème des critères de choix des variables à tester dans les hypothèses des modèles hédonistes d'estimation des prix. Analyse du marché des logements en condominium à Singapour.
Evaluating soil erosion models using measured plot data : accounting for variability in the data
The objective of this study was to construct a method for incorporating erosional variability into a system of model evaluation whereby model predictions are compared to measured erosion plot data. The result is a quantitative, statistically based
Discharge ; Ethiopia ; Hydrology ; Interannual variability ; Monsoon ; Mountain ; Precipitation ; Seasonal variability ; Stream flow ; Time series ; Twentieth Century ; Water resources ; Watershed
This paper provides a review of the nature and variability of the climate and hydrology in the source region of the Blue Nile, the central Ethiopian Highlands. Annual rainfall over the basin decreases from the south-west to the north-east
Bayesian estimation of limited dependent variable spatial autoregressive models
Présentation d'une méthode d'échantillonnage pour estimer une modélisation de variables dont la dépendance spatiale est limitée par des processus autorégressifs. La méthode peut s'appliquer à des données qui impliquent des chevauchements dans
Atmospheric circulation ; Climate ; Climatic variability ; Exceptional event ; Poland ; Precipitation ; Time series ; Twentieth Century ; Wind
This article presents the variability to selected extreme climatic phenomena in Poland in the second half of the 20th century. The main attention is paid to the search for exceptional values for indicators or trends that might be regarded as effects
of global warming. Among the circulation indicators considered are the variability to the influx of Arctic and tropical air masses in the period 1951-1999, as well as the numbers of days with fronts.
Variability and change in terrestrial snow cover : data acquisition and links to the atmosphere
Cette synthèse concerne deux défis par rapport au manteau nival : comment suivre cette variable de façon adéquate dans le temps, et comment coupler les tendances et la variabilité du manteau nival à la circulation atmosphérique. Les développements
In this paper principal component analysis (PCA) and singular value decomposition (SVD) are used to define the importance of the variables contributing to the relationship between the transient latent and sensible heat fluxes and to show
their temporal and spatial variation. Both methods of analysis produced 2 very important uncorrelated modes of variability in January and July, indicating that the transient heat fluxes are influenced by few controlling factors. The AA. suggest that these modes
of variability represent the influences of the meridional temperature gradient, atmospheric moisture, and activity within the source and sink regions of the transient heat fluxes.
Variability to the frequency of occurrence of masses of maritime air over northern and central Poland in the 18th to 20th centuries
Air temperature ; Atmospheric circulation ; Climatic variability ; Climatic variation ; Eighteenth Century ; Nineteenth Century ; Oceanicity ; Poland ; Twentieth Century
(1702-1778) and Warsaw (1779-1998). Changes in the frequency of occurrence of these air masses in the course of the year have been treated as a rough measure of variability to the atmospheric circulation over the area in question (advections from
Climate variability in East-Central California during the past 1000 years reflected by high-resolution geochemical and isotopic records from Owens Lake sediments
The AA. present a 1000-yr record of climatic variability and lake-level fluctuation for Owens Lake on interannual to decadal time scales, using variations in acid-leachable concentrations of Mg and Li and δO 18 values to reflect the lake-level
An empirical estimation of the effect of some variables on land sub-division in Madras
Analyse empirique des déterminants de la mise en valeur foncière à Madras, à l'aide d'un modèle de régression. Des variables telles que l'accessibilité, les valeurs foncières moyennes, l'environnement social et la densité moyenne de population sont
Within-slope variability of ground heat flux, subarctic Yukon
This study examined local variability of heat flux within a north-facing hillslope in Wolf Creek basin, Yukon, during the thawed season of 1997. Ground heat flux was calculated by : 1) assessing vertical conduction and convection inputs using
Forms, response times and variability of relative sea-level curves, glaciated North America
Canadian geomorphology 2000
This paper examines the variability of North American relative sea level (RSL) curves, which are of 3 general forms, and comment on the probable causes and significance of these variations. The data presented in this paper come from the RSL database
The AA. made systematic measurements of geomorphic and potential fish habitat variables over nearly 100 km of the Drôme River (an Alpine tributary to the Rhône River in France) to document longitudinal variation in these variables and to test