Andrew Coulson Education Freedom Index:

In memory of Andrew Coulson, originator of this concept, and much of the basis for quantifying it.

Use the online calculator to convert school system descriptors into an education freedom index (EFI) value; a number from zero (100% centralized) to 100 (100% decentralized). The EFI’s formulas and data requirements are described in this journal article.

EFI Calculator