Browsing by Author "Shen, Chih-Kang"

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A systematic approach for identifying level-1 error covariance structures in latent growth modeling
(2017-05-01)
Ding, Cherng G.
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Jane, Ten-Der
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Wu, Chiu-Hui
;
Lin, Hang-Rung
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Shen, Chih-Kang
It has been pointed out in the literature that misspecification of the level-1 error covariance structure in latent growth modeling (LGM) has detrimental impacts on the inferences about growth parameters. Since correct covariance structure is difficult to specify by theory, the identification needs to rely on a specification search, which, however, is not systematically addressed in the literature. In this study, we first discuss characteristics of various covariance structures and their nested relations, based on which we then propose a systematic approach to facilitate identifying a plausible covariance structure. A test for stationarity of an error process and the sequential chi-square difference test are conducted in the approach. Preliminary simulation results indicate that the approach performs well when sample size is large enough. The approach is illustrated with empirical data. We recommend that the approach be used in LGM empirical studies to improve the quality of the specification of the error covariance structure.
Perceived organizational support, participation in decision making, and perceived insider status for contract workers A case study
(2017-01-01)
Ding, Cherng G.
;
Shen, Chih-Kang
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經營管理研究所
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Institute of Business and Management
Purpose - The purpose of this paper is to examine the roles of perceived organizational support (POS) and work status (regular worker/contract worker) in moderating the relationship between participation in decision making (PDM) and perceived insider status (PIS). Design/methodology/approach - Data were collected with survey questionnaires that were administered to a sample of 369 employees from a case company in Taiwan, for which both regular and contract workers constitute the main workforce. After confirming the reliability and validity of the measurements, the authors conducted hierarchical regression analysis to examine the hypothesized relationships. Findings - The mean PIS for regular workers is smaller than that for contract workers in the case company. For the group of contract workers, the positive influence of PDM on PIS is greater for those with lower POS than for those with higher POS. However, the negative moderating effect of POS does not exist for the group of regular workers. Originality/value - This study adds to the existing literature by showing that contract workers, classified as external workers, can experience PIS, and that POS negatively moderates the positive relationship between PDM and PIS for contract workers. The managerial implications are discussed.