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MBBEFD cumulative loss distribution should be used in your MBBEFD example, not G(x) exposure curve. #3

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@hdavid333 hdavid333 commented May 3, 2025

I think your MBBEFD example does not work. Seems it should use CDF F(x) of MBBEFD, not exposure curve G(x).
Because I was unsure of this, I created aggregate that should be completely fixed at exactly 1 claim per exposure, close to 1.000 loss intensity, E(X). This worked as expected using CDF F(x), and not as expected using G(x) provided in your example.

I tried to test fix completely in build of .rst, but don't know how to build .rst. I did test however via copy paste of the code chunks.

Demonstration of test is in html files of "issue-raised" folder of MBBEFD-edit branch in my copy of the repo.

Getting right loss degree using MBBEFD CDF, F(x)
https://htmlpreview.github.io/?https://github.com/hdavid333/aggregate/blob/MBBEFD-edit/issue_raised/agg%20MBBEFD%20using%20CDF.html

Not getting right loss degree using exposure curve, G(x)
https://htmlpreview.github.io/?https://github.com/hdavid333/aggregate/blob/MBBEFD-edit/issue_raised/agg%20using%20G%20(which%20does%20not%20seem%20correct%20as%20used).html

@hdavid333 hdavid333 changed the title MBBEDF cumulative loss distribution should be used in your MBBEFD example, not G(x) exposure curve. MBBEFD cumulative loss distribution should be used in your MBBEFD example, not G(x) exposure curve. May 3, 2025
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