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Environmental factors in dysregulation of puberty timing and progression
(Elsevier B.V., 2014-04-01)
Reaction Times of Preschool Children on the Ruler Drop Test: A Cross-Sectional Study With Reference Values
(SAGE Publications Inc., 2018)
Reliability of the timed up and go test in fibromyalgia
(Lippincott Williams and Wilkins, 2018)
Time use in the city and labor productivity: Distribution patterns of work, transportation and leisure
(CENTRUM PublishingPE, 2019)
Time-varying covariance structures in currency markets
(Escola de Pós-Graduação em Economia da FGV, 2000-07)
In this article we use factor models to describe a certain class of covariance structure for financiaI time series models. More specifical1y, we concentrate on situations where the factor variances are modeled by a ...