Results 131 to 140 of about 55,665 (307)

Marginal inference for hierarchical generalized linear mixed models with patterned covariance matrices using the Laplace approximation. [PDF]

Environmetrics, 2022
Ver Hoef JM, Blagg E, Dumelle M, Dixon PM, Zimmerman DL, Conn PB.   +5 more
europepmc   +1 more source

Synthetic MRI Neuroimaging Correlates of Frailty: Correlations Between Frailty Scales and Brain Structural Integrity

AGING MEDICINE, EarlyView.
Frailty was associated with decreased gray and white matter brain volumes in older adults. Synthetic MRI further revealed relaxometry alterations correlated with frailty severity across multiple clinical scales. ABSTRACT Objectives Frailty, a common condition in the elderly, is characterized by a decline in physiological reserves and an increased ...
Yuhui Chen, Fan Feng, Sicong Wang, Qi Wang, Hua Wang, Min Chen, Tao Gong, Chunmei Li   +7 more
wiley   +1 more source

On the estimation of covariance matrices using panel data artificial regressions

, 2003
The use of artificial regressions to compute the variance of the difference of pairs of panel data estimators that cannot be ranked in terms of efficiency is considered.
Patacchini, Eleonora
core  

Corrigendum to: Genomic mating in outbred species: predicting cross usefulness with additive and total genetic covariance matrices. [PDF]

Genetics, 2022
Wolfe MD, Chan AW, Kulakow P, Rabbi I, Jannink JL.   +4 more
europepmc   +1 more source

Foreign labor, peer‐networking and agricultural efficiency in the Italian dairy sector

Agribusiness, EarlyView.
Abstract While the presence of immigrants in the agricultural sector is widely acknowledged, the empirical evidence on its economic consequences is lacking, especially from a microeconomic perspective. Using the Farm Accountancy Data Network panel data for Italian dairy farms in the period 2008–2018, the present study investigates the relationship ...
Federico Antonioli, Simone Severini, Mauro Vigani   +2 more
wiley   +1 more source

Matrices

, 2015
Variance/covariance matrices used in this study, separated by species. The BSFG G-matrix is named G_Bayes.
Sebastião, Harley, Porto, Arthur, Silvia Eliza Pavan (3290691), Harley Sebastião (3290688), John L. VandeBerg (195842), VandeBerg, John L., Cheverud, James M., Gabriel Marroig (68971), James M. Cheverud (78008), Marroig, Gabriel, Pavan, Silvia Eliza, Arthur Porto (3272547)   +11 more
core   +1 more source

Genomic mating in outbred species: predicting cross usefulness with additive and total genetic covariance matrices. [PDF]

Genetics, 2021
Wolfe MD, Chan AW, Kulakow P, Rabbi I, Jannink JL.   +4 more
europepmc   +1 more source

How Does Cultural and Colonial Heritage Affect Optimal Branding Strategies? Evidence From the Rice Sector in Senegal

Agribusiness, EarlyView.
ABSTRACT Africa's cultural and colonial heritage has profoundly segmented rice markets. Whereas in ancient centers of rice domestication, consumers maintained preferences for local rice consistent with their cultural heritage, preferences have shifted toward imported Asian rice in coastal areas around seaports, due to prior exposure to colonial import ...
Kofi Britwum, Matty Demont
wiley   +1 more source

Consistency of Kernel Estimators of Heteroscedastic and Autocorrelated Covariance Matrices

Conditions are derived for the consistency of kernel estimators of the covariance matrix of a sum of vectors of dependent heterogeneous random variables, which match those of the currently best-known conditions for the central limit theorem, as required ...
Jong, R.M. de, Davidson, J.
core  

P (covariance matrices)

, 2011
Phenotypic covariance matrices for 18 morphological traits for the 8 Anolis species and pooled ...
Losos, Jonathan B, Edmund D. Brodie III (142668), Revell, Liam J., Jonathan B Losos (3311070), Kolbe, Jason J., Brodie III, Edmund D., Szekely, Brian, Liam J. Revell (412818), Brian Szekely (3311073), Jason J. Kolbe (382001)   +9 more
core   +1 more source