Table 2.

Technical efficiency (TE) scores

	Mean	Standard error SE	Median	Min	Max
Pooled technical efficiency TE	0.792	0.030	0.828	0.470	0.980
Pure/managerial TE	0.876	0.035	0.935	0.590	0.976
Scale TE	0.892	0.027	0.940	0.670	0.981
Data envelopment analysis DEA	0.791	0.035	0.846	0.470	0.980
Stochastic frontier analysis SFA	0.801	0.036	0.776	0.755	0.871
Upper-middle income	0.796	0.031	0.800	0.557	0.980
High income	0.778	0.104	0.859	0.470	0.923