Ridge estimation of a semiparametric regression model

Influence diagnostic in ridge semiparametric models

“…There are a few studies that looked at overcoming the rank-deficient and ill-conditioned or multicollinearity problems in SPRMs (see Hu (2005), Duran et al (2012) and Roozbeh (2015)). Here, we use the RPLSEs which can be obtained by min-…”

The relative efficiency of Liu-type estimator in a partially linear model

“…Hu [6] used two-step way and introduced a ridge estimators for the partially linear model. Duran et al [7] also discussed the two-step method.…”

Principal Components Regression Estimation in Semiparametric Partially Linear Additive Models

“…in the last decade, estimation of semiparametric regression model by the biased estimate approach to solve the problem of multicollinearity has received much attention in the literature. Hu (2005) and Akdeniz and Tabakan (2009) applied ridge estimator and restricted ridge estimator for the regression coefficients. The asymptotic properties of restricted ridge estimators were discussed by Roozbeh and Arashi (2013).…”