Risk Attribution Index applied to triangles

Professional Actuarial Topics Property/Casualty
1

Hi, the CAS March-April Actuarial Review has an article where the Risk Attribution Index is applied to two triangles to decompose frequency, severity, and inflation.

Is the algorithm used for this publicly available somewhere, preferably in R or Python?
Is the algorithm as applied to the author’s examples publicly available somewhere?

2

It looks like the author is on LinkedIn and so you might be able to reach out if you don’t get an answer here.