Testing for country heterogeneity in growth models using a finite mixture approach
用双变量混合模型检验经济增长是否外生，发现考虑国家异质性后，投资率与增长率无显著关联，且不存在向单一均衡收敛的迹象。
Abstract We define a bivariate mixture model to test whether economic growth can be considered exogenous in the Solovian sense. For this purpose, the multivariate mixture approach proposed by Alfò and Trovato is applied to the Bernanke and Gürkaynak extension of the Solow model. We find that the explanatory power of the Solow growth model is enhanced, since growth rates are not statistically significantly associated with investment rates, when cross‐country heterogeneity is considered. Moreover, no sign of convergence to a single equilibrium is found. Copyright © 2008 John Wiley & Sons, Ltd.