An Interval Efficiency Measurement without Sign Restrictions in Data

Table 1

Comparing IMSBM model with other DEA models.

	IGDEA	Interval SBM	VRMs	MSBM	Interval SORM	IMSBM
Interval data	√	√	✕	✕	√	√
Negative data	✕	✕	√	√	√	√
Slacks-based	✕	√	✕	√	✕	√