A comparative study of parametric and nonparametric estimates of the attributable fraction for a semi-continuous exposure.

A Comparative Study Of Parametric And Nonparametric Regressions

برآورد خطر قابل انتساب آنتراکوزیس به علت مواجهه با دود هنگام پخت نان در تنورهای خانگی

Background & Objectives: Some case-report studies in Iran showed probable association between anthracosis and smoke exposure due to baking homemade bread, population. Therefore we estimated the population attributable fraction (PAF) for this probable association in Iranian population. Methods: A hospital-based case-control study, including 83 anthracotic subjects (cases) with 72 controls f...

Semi-parametric Quantile Regression for Analysing Continuous Longitudinal Responses

Recently, quantile regression (QR) models are often applied for longitudinal data analysis. When the distribution of responses seems to be skew and asymmetric due to outliers and heavy-tails, QR models may work suitably. In this paper, a semi-parametric quantile regression model is developed for analysing continuous longitudinal responses. The error term's distribution is assumed to be Asymmetr...

The Role of R&D in Trade Expansion: A Semi-parametric Gravity Specification for East and West Asia

In more recent years, it has become increasingly recognized that R&D (research and development) is a key driver of economic growth, a source of innovation and change, and as such stimulates improvements in productivity and economic competitiveness. It is closely associated with knowledge and flexibility, two factors that have gained new significance as a source of competitiveness in an increasi...

Evaluation Approaches of Value at Risk for Tehran Stock Exchange

The purpose of this study is estimation of daily Value at Risk (VaR) for total index of Tehran Stock Exchange using parametric, nonparametric and semi-parametric approaches. Conditional and unconditional coverage backtesting are used for evaluating the accuracy of calculated VaR and also to compare the performance of mentioned approaches. In most cases, based on backtesting statistics Results, ...