This paper extends two different metafrontier models proposed by O'Donnell et al. (2008) and Huang et al. (2014) to the input-oriented distance functional form which has been mentioned by O'Donnell et al. (2008, p250) but has not been done so far partly due to endogenous problem. As noted by...

Several stationarity tests in heterogeneous panel data models are proposed in this chapter. By allowing maximum degree of heterogeneity in the panel, two different ways of pooling information from independent tests, the group mean and the Fisher tests, are used to develop the panel stationarity...