نتایج جستجو برای: روش ols

تعداد نتایج: 374040  

2011
Seung Hyun Hong Martin Wagner

This paper develops a fully modified OLS estimator for cointegrating polynomial regressions, i.e. for regressions including deterministic variables, integrated processes and powers of integrated processes as explanatory variables and stationary errors. The errors are allowed to be serially correlated and the regressors are allowed to be endogenous. The paper thus extends the fully modified appr...

Journal: :Social science research 2014
Mikhail Balaev

The author examines how time delayed effects of economic development, education, and gender equality influence political democracy. Literature review shows inadequate understanding of lagged effects, which raises methodological and theoretical issues with the current quantitative studies of democracy. Using country-years as a unit of analysis, the author estimates a series of OLS PCSE models fo...

2016
Douglas W. Bolzan Walter José Gomes Isadora S. Rocco Marcela Viceconte Mara L. S. Nasrala Hayanne O. Pauletti Rita Simone L. Moreira Nelson A. Hossne Jr Ross Arena Solange Guizilini

Objective To compare pulmonary function, functional capacity and clinical outcomes amongst three groups of patients with left ventricular dysfunction following off-pump coronary artery bypass, namely: 1) conventional mechanical ventilation (CMV); 2) late open lung strategy (L-OLS); and 3) early open lung strategy (E-OLS). Methods Sixty-one patients were randomized into 3 groups: 1) CMV (n=21)...

ژورنال: :علوم اقتصادی 2014
ابراهیم عباسی اکرم رحیمی

در بسیاری از مطالعات وجود رابطه معنی دار میان رشد اقتصاد ملی و گسترش بازار های بیمه ای نشان داده شده است. این بازارها با بسیج پس اندازها و هدایت آنها به بازار سرمایه، زمینه رشد اقتصادی را فراهم می نمایند. در سالهای اخیر، سیاست خصوصی سازی صنعت بیمه رونق گرفته و شرکت های بیمه خصوصی همگام با بخش دولتی در بازار بیمه فعالیت می کنند. هدف این مقاله شناسایی عوامل موثر بر تقاضای بیمه عمر و تحلیل رفتاری ...

2013
X Y Zhang C Cai P J Li

Stable night lights data from Defense Meteorological Satellite Program (DMSP) Operational Line-scan System (OLS) provide a unique proxy for anthropogenic development. This paper proposed two new methods of extracting regional urban extents using DMSP-OLS data, MODIS NDVI data and Land Surface Temperature (LST) data. MODIS NDVI data were used to reduce the over-glow effect, since urban areas gen...

2013
Yu-Wen Wen Yi-Wen Tsai David Bin-Chia Wu Pei-Fen Chen

Ordinary least square (OLS) in regression has been widely used to analyze patient-level data in cost-effectiveness analysis (CEA). However, the estimates, inference and decision making in the economic evaluation based on OLS estimation may be biased by the presence of outliers. Instead, robust estimation can remain unaffected and provide result which is resistant to outliers. The objective of t...

Journal: :Glia 2010
J Watzlawik E Holicky D D Edberg D L Marks A E Warrington B R Wright R E Pagano M Rodriguez

PURPOSE Human remyelination promoting IgM mAbs target oligodendrocytes (OLs) and function in animal models of multiple sclerosis (MS). However, their mechanism of action is unknown. This study seeks to identify the cellular mechanism of action of a recombinant human IgM on OL survival. METHODS Binding of rHIgM22 to the surface of rat OLs was studied by co-localization with various markers. RH...

Journal: :Applied Mathematics and Computation 2016
Alvaro Frank Diego Fabregat-Traver Paolo Bientinesi

In statistics, series of ordinary least squares problems (OLS) are used to study the linear correlation among sets of variables of interest; in many studies, the number of such variables is at least in the millions, and the corresponding datasets occupy terabytes of disk space. As the availability of large-scale datasets increases regularly, so does the challenge in dealing with them. Indeed, t...

Journal: :The Journal of veterinary medical science 2007
Katumasa Ookawa Kazuo Mochizuki Eiji Shida Toshihiro Suzuki Tomoko Ooba Toru Matumoto Yoshinori Hokari Masayuki Hashidume Hidehiko Yokogoshi

Using an elevated plus-maze test, we evaluated anxiety level in rats given ovary lipid extracted from Skipjack tuna (Katsuwonus pelamis; OLS). The percentage of open time was significantly higher in rats given OLS than in rats in the control group, but lower than in rats given diazepam (1.0 mg/kg body weight). Based on this fact and findings about other indicators, this study showed that OLS do...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2016
Marisa A Jeffries Kelly Urbanek Lester Torres Stacy Gelhaus Wendell Maria E Rubio Sharyl L Fyffe-Maricich

UNLABELLED Growing evidence shows that mechanisms controlling CNS plasticity extend beyond the synapse and that alterations in myelin can modify conduction velocity, leading to changes in neural circuitry. Although it is widely accepted that newly generated oligodendrocytes (OLs) produce myelin in the adult CNS, the contribution of preexisting OLs to functional myelin remodeling is not known. H...

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