Search Results - "Longford, N. T."

Mixture models with an improper component by Longford, N. T., D'Urso, Pierpaolo

“…A class of mixture models in which a component is associated with an improper distribution is introduced. This component is intended mainly for outliers. The…”
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Editorial: Model selection and efficiency-is 'Which model ...?' the right question? by Longford, N. T.

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impact of handling missing data on alcohol consumption estimates in the UK women cohort study by Nur, U, Longford, N. T, Cade, J. E, Greenwood, D. C

“…We discuss methods for dealing with incomplete-data in the United Kingdom Women's Cohort Study. We demonstrate by example how important it is to address the…”
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Selection bias and treatment heterogeneity in clinical trials by Longford, Nicholas T.

“…A common perception about many commercially available medical treatments is that they are effective for every patient having the relevant indication and that…”
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GENDER DIFFERENCES IN THE RELATIONSHIP BETWEEN ALCOHOL CONSUMPTION AND DRINK PROBLEMS ARE LARGELY ACCOUNTED FOR BY BODY WATER by Ely, Margaret, Hardy, Rebecca, Longford, Nicholas T., Wadsworth, Michael E. J.

“…It is widely reported that women drink less and have a lower prevalence of drink problems than men, but the gender differences in the relationship between…”
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Effects of fatigue on the torque-velocity relation in muscle by Spendiff, O, Longford, N T, Winter, E M

“…Background: The extent to which fatigue is related to the velocity of shortening is still not fully understood. Objectives: To examine the effects of fatigue…”
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Influence of exercise and menstrual cycle phase on plasma homocyst(e)ine levels in young women : a prospective study by DE CREE, C, MALINOW, M. R, VAN KRANENBURG, G. P, GEURTEN, P. G, LONGFORD, N. T, KEIZER, H. A

“…Plasma total homocysteine (tHcy) has been identified as an independent risk factor for cardiovascular diseases (CVD). The difference in tHcy between the sexes…”
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Factor Analysis for Clustered Observations by Longford, N. T, Muthen, B. O

“…A two-level model for factor analysis is defined, and formulas for a scoring algorithm for this model are derived. A simple noniterative method based on…”
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Multivariate shrinkage estimation of small area means and proportions by Longford, N. T.

“…The familiar (univariate) shrinkage estimator of a small area mean or proportion combines information from the small area and a national survey. We define a…”
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An experiment in primary health care provision by Longford, N. T.

“…Missing data and, more generally, imperfections in implementing a study design are an endemic problem in large scale studies involving human subjects. We…”
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Stability of household income in European countries in the 1990s by Longford, N.T., Pittau, M.G.

“…The patterns of change in the annual household income in the countries of the European Community during the years 1994–1999 are explored. The income is…”
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On Estimating Standard Errors in Multilevel Analysis by Longford, Nicholas T.

“…Standard errors of maximum likelihood estimators are commonly estimated from the inverse of the information matrix. When the information matrix is a function…”
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Statistics versus statistical science in the regulatory process by Longford, Nicholas T., Nelder, John A.

“…This paper reviews the established practice of providing evidence to regulatory authorities about the claimed properties (such as efficacy and safety) of new…”
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Factors associated with the prevalence of stereotypic behaviour amongst Thoroughbred horses passing through auctioneer sales by Mills, Daniel S, Alston, Robert D, Rogers, Victoria, Longford, Nicholas T

“…The objective of this study was to evaluate whether sex, age and/or coat colour were associated with the occurrence of stereotypic behaviour in the horse and…”
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A Bayesian information criterion for singular models by Drton, Mathias, Plummer, Martyn, Claeskens, Gerda, Rousseau, Judith, Robert, Christian P., Imai, Toru, Kuroki, Manabu, Friel, N., McKeone, J. P., Oates, C. J., Pettitt, A. N., McLachlan, G. J., Nguyen, H. D., Charnigo, Richard, Longford, N. T., Bhansali, R. J., Cameron, Ewan, Pettitt, Anthony N., Chopin, Nicolas, Draper, David, Kuriki, Satoshi, Mateu, Jorge, Ferreira, Guillermo, Mattei, Pierre-Alexandre, Nugent, Rebecca, Lorenzi, Elizabeth, Frisoli, Kayla, Raftery, Adrian E., South, L. F., Drovandi, C. C., Stehlík, Milan, Wyse, Jason, White, Arthur, Zhu, Rui, Yang, Xiaochen, Ling, Yurong, Xue, Jing-Hao

“…We consider approximate Bayesian model choice for model selection problems that involve models whose Fisher information matrices may fail to be invertible…”
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A fast scoring algorithm for maximum likelihood estimation in unbalanced mixed models with nested random effects by Longford, Nicholas T.

“…A fast Fisher scoring algorithm for maximum likelihood estimation in unbalanced mixed models with nested random effects is described. The algorithm uses…”
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Missing data and small area estimation in the UK Labour Force Survey by Longford, Nicholas T.

“…We apply multivariate shrinkage to estimate local area rates of unemployment and economic inactivity by using UK Labour Force Survey data. The method exploits…”
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Synthetic estimators with moderating influence: the carry-over in cross-over trials revisited by Longford, Nicholas T.

“…A general approach to combining alternative estimators of a parameter is described and applied to the analysis of 2×2 cross‐over trials in which the treatment…”
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Letter to the Editors: "Improved Approximations for Multilevel Models with Binary Responses" by Longford, N. T

“…Abstract only…”
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Simulation-based diagnostics in random-coefficient models by Longford, Nicholas T.

“…Commonly applied diagnostic procedures in random-coefficient (multilevel) analysis are based on an inspection of the residuals, motivated by established…”
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