In this paper, we study nonclassical measurement error in the continuous dependent variable of a semiparametric transformation model. The main complication arises because we allow the (additive) measurement error to be correlated with a (continuous) component of the regressors as well as with the ...
thatboththedependentandtheexplanatoryvariablehavemeanzero.Suppose wewishtoestimatethepopulationrelationship y= x+ (1) Unfortunately,weonlyhavedataon ex=x+u(2) ey=y+v(3) i.e.ourobservedvariablesaremeasuredwithanadditiveerror.Let’smakethe followingsimplifyingassumptions E(u)=0(4) plim 1 n (y 0...
Linear time-dependent reference intervals where there is measurement error in the time variable - a parametric approach 来自 Semantic Scholar 喜欢 0 阅读量: 20 作者: Gillard,Jonathan William 摘要: This article re-examines parametric methods for the calculation of time specific reference intervals ...
This paper addresses three topics to which researchers should turn their attention in regard to the dependent variable of giving and volunteering. The first is to develop an expanded definition of philanthropy revolving around the notion of 'gift' and the relations of exchange and around the theolog...
Thus, based on the above assumption, Pulcini [22] proposed a perturbed gamma process in which the measurement error is normally distributed with a mean zero, and the standard deviation depends on the actual value. Similarly, Giorgio [23] used a three-parameter inverse gamma variable to model ...
Endogeneity is controlled for by making use of covariates as conditioning instruments; this ensures independence between the endogenous causes and other unobservable drivers of the dependent variable. Moreover, distributions of the underlying true causes from their error-laden measurements are recovered. ...
We consider the regression of an environmental measurement (dependent variable) on several covariates (independent variables). Various strategies are commonly employed to impute values for interval-measured data, including assignment of one-half the detection limit to nondetected values or of "fill-in"...
The second method is a weighted least squares (WLS) estimator, which applies only for the case in which the "independent" variable is measured without error and the magnitudes of the measurement errors on the "dependent" variable are independent of the measurements. Several applications are made ...
Incorporating measurement error in the estimation of autoregressive models for longitudinal data Rosner et al. (Stat. Med.4 (1985), 457鈥 467) discussed the use of a first-order autoregressive model for longitudinal data with multiple time-dependent and... CH Schmid,MR Segal,B Rosner - 《Jour...
Testing for the presence of measurement error Wilhelm (2018) shows that, under some conditions, the null hypothesis H0 is equivalent to the hypothesis of no measurement error in X. In this context, the variable Z must be excluded from the outcome equation. For example, it could be a second...