Attempts can be found in the DEA literature to identify returns to scale at efficient interior points of the production …

There are some specific features of the non-radial DEA (data envelopment analysis) models which cause some problems … under the returns to scale measurement. In the scientific literature on DEA, some methods were suggested to deal with the … returns to scale measurement in the non-radial DEA models. These methods are based on using Strong Complementary Slackness …