Why is the International Baccalaureate not revealing its algorithm?

Can’t think of any reason not to, and I’m concerned that it may have used the fallacy of confusing analysis and observation at some point in the process

There is no way to know, however, it makes sense why they are not revealing the algorithm. The reason they are probably not is because they themselves, know the inherent limitations of statistics and the using of an algorithm in order to model how students will do on test day. From the information we know about the model, they are saying that they will use predicted grades, ia, and historical data to create a score. So, technically, if your school inflates predicted grades last year, and then didn’t this year, you would get a horrible grade. The honest truth is that an statistical model does not account for individuality, and they know this. People can score differently based on a multitude of factors, which is why their predicted grades are so inaccurate. The problem is if they release it someone will find a flaw in it (since it is statistics) and then tell them to redo all of the grading. They don’t want that. (my opinion). Hope this helps.