Spatial System Estimators for Panel Models: A Sensitivity and Simulation Study

Liu, Shuangzhe and Ma, Tiefeng and Polasek, Wolfgang (December 2012) Spatial System Estimators for Panel Models: A Sensitivity and Simulation Study. IHS Economics Series 294

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Abstract or Table of Contents

Abstract: System of panel models are popular models in applied sciences and the question of spatial errors has created the recent demand for spatial system estimation of panel models. Therefore we propose new diagnostic methods to explore if the spatial component will change significantly the outcome of non-spatial estimates of seemingly unrelated regression (SUR) systems. We apply a local sensitivity approach to study the behavior of generalized least squares (GLS) estimators in two spatial autoregression SUR system models: a SAR model with SUR errors (SAR-SUR) and a SUR model with spatial errors (SUR-SEM). Using matrix derivative calculus we establish a sensitivity matrix for spatial panel models and we show how a first order Taylor approximation of the GLS estimators can be used to approximate the GLS estimators in spatial SUR models. In a simulation study we demonstrate the good quality of our approximation results.;

Item Type: IHS Series
Keywords: 'Seemingly unrelated regression models' 'Panel systems with spatial errors' 'SAR and SEM models' 'Generalized least-squares estimators' 'Taylor approximations'
Classification Codes (e.g. JEL): G14, G15, C22
Status: Published
Date Deposited: 26 Sep 2014 10:39
Last Modified: 22 Jul 2017 05:41
URI: http://irihs.ihs.ac.at/id/eprint/2177

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