DEA
DEA-RAM: Range-Adjusted Measure of Inefficiency
Cooper, W. W., Park, K. S., Pastor, J. T. · 1999
Method assistant
Grounded explanations: it explains the method, it does not compute.
Assumptions to verify
- •All inputs and outputs non-negative
- •No constant column (zero range would produce undefined weight)
- •VRS assumption is appropriate (Σλ=1 enforced)
When not to use
- •CRS assumption holds: use CCR
- •Negative data present
- •All values in a column identical (zero-range column)
How to cite
Cooper, W. W.; Park, K. S.; Pastor, J. T. (1999). RAM: A Range Adjusted Measure of Inefficiency for Use with Additive Models, and Relations to Other Models and Measures in DEA. Journal of Productivity Analysis. https://doi.org/10.1023/A:1007701304281