Asymptotic Efficiency in Parametric Structural Models with Parameter-Dependent Support

2003 ◽  
Author(s):  
Keisuke Hirano ◽  
Jack Porter
Keyword(s):  
Asymptotic Efficiency ◽  
Structural Models ◽  
Parameter Dependent

Semiparametric IV Estimation with Parameter Dependent Instruments

1992 ◽  
Vol 8 (3) ◽  
pp. 403-406
Author(s):  
Paul Rilstone
Keyword(s):  
Nonparametric Estimation ◽  
Method Of Moments ◽  
Conditional Expectation ◽  
Asymptotic Efficiency ◽  
Functional Form ◽  
Moment Equations ◽  
Unknown Parameters ◽  
Iv Estimation ◽  
Sample Moment ◽  
Parameter Dependent

A well-known result in the method of moments literature is that the efficient instruments for the estimation of a model are functions of the conditional expectation of its gradient. Some recent studies have suggested the nonparametric estimation of these instruments when they are of unknown functional form. When these instruments in turn depend on the unknown parameters it has been suggested that these be replaced by preliminary consistent estimates. It is shown here that solving the sample moment equations simultaneously over the instruments and the residuals of the model will generally produce the same asymptotic efficiency and avoid the disadvantages inherent with the use of preliminary estimates.

Validation of the Short Dark Triad in a German Sample

2020 ◽  
pp. 1-12
Author(s):  
Caroline Wehner ◽  
Ulrike Maaß ◽  
Marius Leckelt ◽  
Mitja D. Back ◽  
Matthias Ziegler
Keyword(s):  
Sensation Seeking ◽  
Factor Model ◽  
Structural Models ◽  
Self Esteem ◽  
Dark Triad ◽  
Fit Indices ◽  
Nomological Network ◽  
Competitive Test ◽  
Three Factor ◽  
Behavioral Criteria

Abstract. The structure, correlates, and assessment of the Dark Triad are widely discussed in several fields of psychology. Based on the German version of the Short Dark Triad (SDT), we add to this by (a) providing a competitive test of existing structural models, (b) testing the nomological network, and (c) proposing an ultrashort 9-item version of the SDT (uSDT). A sample of N = 969 participants provided data on the SDT and a range of further measures. Our competitive test of five structural models revealed that fit indices and nomological network assumptions were best met in a three-factor model, with separate factors for psychopathy, Machiavellianism, and narcissism. The results provided an extensive overview of the raw, unique, and shared associations of Dark Triad dimensions with narcissism facets, sadism, impulsivity, self-esteem, sensation seeking, the Big Five, maladaptive personality traits, sociosexual orientation, and behavioral criteria. Finally, the uSDT exhibited satisfactory psychometric properties. The highest overlap in expected relations between SDT and uSDT, and convergent and discriminant measures was also found for the three-factor model. Our study underlines the utility of a three-factor model of the Dark Triad, extends findings on its nomological network, and provides an ultrashort instrument.

Structural models of water

2006 ◽  
Vol 176 (8) ◽  
pp. 833 ◽  
Author(s):  
Gari N. Sarkisov
Keyword(s):  
Structural Models
Sign in / Sign up

Export Citation Format

Share Document