For my research, I need a measure of the quality of education that I could apply to multiple countries. It must include quality of tertiary education.
Standard measures like HDI Education Index are not precise enough. For example in HDI Education Index, Kazakhstan is ranked along Hong Kong, Belarus above Singapore, etc. Such absurd discrepancies destroy any hope for good results for my model.
Please, if you have an idea (no matter how wild it is) what I can use as a proxy for quality of education, please share it.