APA
Yang L., National Bureau of Economic Research, Qian Y. & Xie H.Handling endogenous marketing mix regressors in correlated heterogeneous panels with copula augmented mean group estimation. Cambridge: NBER.
Chicago
Yang Liying, National Bureau of Economic Research, Qian Yi and Xie Hui.Handling endogenous marketing mix regressors in correlated heterogeneous panels with copula augmented mean group estimation. Cambridge: NBER.
Harvard
Yang L., National Bureau of Economic Research, Qian Y. and Xie H.Handling endogenous marketing mix regressors in correlated heterogeneous panels with copula augmented mean group estimation. Cambridge: NBER.
MLA
Yang Liying, National Bureau of Economic Research, Qian Yi and Xie Hui.Cambridge: NBER. .