Ratio-variable VRS DEA is equivalent to volume-variable CRS DEA with a non-controllable size variable, and the paper uses this to evaluate OECD education systems on PISA 2022 data.
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On the suitability of ratio variables in data envelopment analysis: An application to education with methodological extensions
Ratio-variable VRS DEA is equivalent to volume-variable CRS DEA with a non-controllable size variable, and the paper uses this to evaluate OECD education systems on PISA 2022 data.