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Common Correlated Effects Estimation of Unbalanced Panel Data Models with Cross-Sectional Dependence
Qiankun Zhou,Yonghui Zhang 한국계량경제학회 2016 계량경제학보 Vol.27 No.4
We consider the estimation and inference of unbalanced panel data models with cross-sectional dependence with a large number of individual units in a relatively short time period. By following the common correlated effects (CCE) approach of Pesaran (2006), we propose a CCE estimator for unbalanced panels (CCE-UB). The asymptotics of the CCE-UB estimator is developed in the paper. Small scale Monte Carlo simulation is conducted to examine the finite sample properties of the proposed estimator.
Tao Shao,Dehong Bai,Mingzhu Qiu,Yu Li,Qiankun Zhang,Ziyu Xue,Shijie He,Dongxia Zhang,Xibin Zhou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-
Facile synthesis of more dendritic and uniform Pt-based nanostructures with carbon materials couldgreatly reduce cost and increase Pt utilization for methanol oxidation reaction (MOR) in direct methanolfuel cell (DMFC). This study reports a novel one-pot method to fabricate AgPt nano-pompons (AgPt NPs)with the guidance of N-GQDs through AA reduce the precursor of Ag and Pt. Morphology characterizationdescribes N-GQDs as morphology guiding and dispersing agents to regulate the dendrite formation ofnano-pompons. Under the optimized conditions, the AgPt NPs (Ag1Pt2) display above 11 times improvementin electrocatalytic activity and higher stability for the MOR compared with Pt/C catalysts. Densityfunction theory (DFT) studies prove that the introduction of Ag can greatly enhance the adsorption of COon Pt and promote the transformation of CO to COOH. The facile synthetic method and excellent MORperformance endow AgPt NPs with great application prospect in DMFCs as an anode catalyst.