T-test of difference of means | ||||||
Period | Technical Efficiency | Allocative Efficiency | Economic Efficiency | |||
Equal Variances | Different Variances | Equal Variances | Different Variances | Equal Variances | Different Variances | |
Mar 01/Dec 01(1) | N/A | 13.133 | −1.9216* | N/A | −12.308 | N/A |
Dec 01/Sep 02(2) | 0.8570 | N/A | 0.2661 | N/A | 0.4404 | N/A |
Sep 02/Mar 03(3) | 0.317 | N/A | −2.7503*** | N/A | −2.0554** | N/A |
Mar 03/Jun 04(4) | −10.030 | N/A | 0.5057 | N/A | 0.1181 | N/A |
Jun 04/Jun 05(5) | 0.4792 | N/A | 0.681 | N/A | 0.6133 | N/A |
Jun 05/Dec 07(6) | −0.6767 | N/A | N/A | 4.4924*** | N/A | 3.6944*** |
Dec 07/Dec 08(7) | 0.3489 | N/A | N/A | −6.0966*** | N/A | −5.2016*** |
Dec 08/Dec 09(8) | N/A | 7.7137*** | −10.686 | N/A | 2.6663*** | N/A |
Dec 09/Jun 11(9) | N/A | −7.1275*** | 3.4154*** | N/A | −0.5271 | N/A |
Jun 11/Dec 12(10) | 11,535 | N/A | 0.4388 | N/A | 10.166 | N/A |
Dec 12/Jun 14(11) | −1.8309* | N/A | 15.131 | N/A | 0.7701 | N/A |