参考文章(4)
Adrian P. Mundt, Winnie S. Chow, Margarita Arduino, Hugo Barrionuevo, Rosemarie Fritsch, Nestor Girala, Alberto Minoletti, Flávia Mitkiewicz, Guillermo Rivera, María Tavares, Stefan Priebe, Psychiatric hospital beds and prison populations in South America since 1990: does the Penrose hypothesis apply? JAMA Psychiatry. ,vol. 72, pp. 112- 118 ,(2015) , 10.1001/JAMAPSYCHIATRY.2014.2433
Jeffrey M. Wooldridge, Fixed-effects and related estimators for correlated random-coefficient and treatment-effect panel data models The Review of Economics and Statistics. ,vol. 87, pp. 385- 390 ,(2005) , 10.1162/0034653053970320