There are literature available on website regarding your problem to deal with negative values. ![]() Since DEA efficiency scores are relative efficiency indicators then as long as the ratio of output values to input values has not been changed your results should not be affected by the scaling up.Ĭite 4 Recommendations 25th Feb, 2015 Gordana Manevska-Tasevska Swedish University of Agricultural Sciences Dear Farhaanah To convert the negative numbers to a positive numbers by adding a positive number (same for all DMU) is a possible choice (as mentioned in Ibrahims comment).įor details, I suggest you to check literature on eco-efficiency, where dealing with negative, undesirable outputs is essential. Maxdea Software Professional Analysis YouĬite 1 Recommendation Popular Answers (1) 23rd Feb, 2015 Delaram Najmaei Lonbani University of Malaya hi Farhaanah, MaxDEA software is usually useful, however for professional analysis you need to buy the professional version ( MaxDEA Pro ).Ĭite 4 Recommendations 25th Feb, 2015 Ibrahim Ahmed Onour University of Khartoum I would suggest scaling up the data cross board by adding a positive number that convert the negative numbers to a positive numbers. Maxdea Software Professional Analysis You.
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