Results 31 to 40 of about 580,777 (188)

A Stochastic Volatility Model With Realized Measures for Option Pricing [PDF]

open access: yes, 2019
Based on the fact that realized measures of volatility are affected by measurement errors, we introduce a new family of discrete-time stochastic volatility models having two measurement equations relating both observed returns and realized measures to ...
Bormetti, G.   +3 more
core   +5 more sources

New Dimensions of Tolerance: A Case for a Broader, Categorical Approach [PDF]

open access: yesSociological Science, 2014
Most social scientific research on tolerance rests upon two assumptions: 1) that tolerance is mainly concerned with the extension of political rights, and 2) that the concept is best understood as a unidimensional continuum of attitudes that are more or ...
Darin M. Mather, Eric Tranby
doaj   +1 more source

Latent tree models

open access: yes, 2017
Latent tree models are graphical models defined on trees, in which only a subset of variables is observed. They were first discussed by Judea Pearl as tree-decomposable distributions to generalise star-decomposable distributions such as the latent class ...
Zwiernik, Piotr
core   +1 more source

Fraction Errors in a Digital Mathematics Environment: Latent Class and Transition Analysis

open access: yesJournal of Numerical Cognition, 2019
Student struggles with fractions are well documented, and due to fractions’ importance to later mathematics achievement, identification of the errors students make when solving fraction problems is an area of interest for both researchers and teachers ...
Sarah Marina Karamarkovich   +1 more
doaj   +1 more source

Social position and anthropometric status among adults in the ELSA-Brasil study: a latent class analysis

open access: yesCadernos de Saúde Pública, 2021
: The objective of the present study was to evaluate the association between social position and anthropometric status in women and men Brazilian adult.
Sheila Maria Alvim Matos   +9 more
doaj   +1 more source

Predictors of subgroups based on maximum drinks per occasion over six years for 833 adolescents and young adults in COGA. [PDF]

open access: yes, 2014
ObjectiveA person's pattern of heavier drinking often changes over time, especially during the early drinking years, and reflects complex relationships among a wide range of characteristics.
Agrawal, Arpana   +10 more
core   +1 more source

Implications of attitudes and beliefs about COVID-19 vaccines for vaccination campaigns in the United States: A latent class analysis

open access: yesPreventive Medicine Reports, 2021
Unprecedented global efforts in vaccine development have resulted in effective vaccines for COVID-19. The pandemic response in the US has been highly politicized, resulting in significant opposition to public health efforts, including vaccines.
Kristin E. Schneider   +3 more
doaj   +1 more source

Dynamics and sparsity in latent threshold factor models: A study in multivariate EEG signal processing

open access: yes, 2016
We discuss Bayesian analysis of multivariate time series with dynamic factor models that exploit time-adaptive sparsity in model parametrizations via the latent threshold approach.
Nakajima, Jouchi, West, Mike
core   +1 more source

A data‐driven examination of apathy and depressive symptoms in dementia with independent replication

open access: yesAlzheimer’s & Dementia: Diagnosis, Assessment & Disease Monitoring, 2023
Apathy is one of the most common neuropsychiatric symptoms (NPS) and is associated with poor clinical outcomes. Research that helps define the apathy phenotype is urgently needed, particularly for clinical and biomarker studies.
Miguel Vasconcelos Da Silva   +6 more
doaj   +1 more source

Investigating Trajectories of Social Recovery in Individuals with First Episode Psychosis:A Latent Class Growth Analysis [PDF]

open access: yes, 2015
Background Social disability is a hallmark of severe mental illness yet individual differences and factors predicting outcome are largely unknown. Aim To explore trajectories and predictors of social recovery following a first episode of psychosis (FEP).
Amos, Tim   +12 more
core   +2 more sources

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