Sorry, I'd wanted to give you this link on Shakeshaft's research background:
Shakeshaft. As you can see, she has no connection at all with a "Catholic" or "Vatican" perspective.
Here I must end my comments, because this is really the limit of my knowledge of the subject.
You may count on my support for "Equal Justice." Amen.
None of us knows Shakeshaft's motives but as you wrote, "Shakeshaft's figures are based on her own investigation, not on prosecutions."
Her "own investigation" does not comport with most people's understanding or their own lying eyes.