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Add ExponentialGammaModel #322

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ColtAllen opened this issue Jul 12, 2023 · 3 comments
Open

Add ExponentialGammaModel #322

ColtAllen opened this issue Jul 12, 2023 · 3 comments
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@ColtAllen
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ColtAllen commented Jul 12, 2023

The Exponential-Gamma model is for continuous-contractual modeling of time-to-event scenarios; examples include the amount of time a customer is exposed to an ad campaign until conversion, and the amount of time a customer starts making in-app purchases after installing the app. A test dataset will need to be determined, and research literature is rather limited - all I was able to find is on page 5 of this paper:

http://mjbrouwer.pbworks.com/f/hfw_jof_98.pdf

However, implementation should be rather similar to the ShiftedBetaGeoModel. It is even mentioned a few times in the paper for that model:

https://faculty.wharton.upenn.edu/wp-content/uploads/2012/04/Fader_hardie_jim_07.pdf

@ColtAllen ColtAllen added enhancement New feature or request CLV labels Jul 12, 2023
@ColtAllen ColtAllen self-assigned this Jan 12, 2024
@ColtAllen
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ColtAllen commented Jan 12, 2024

Found a test dataset:
https://www.brucehardie.com/datasets/hfw_trial_data.txt

Results from the above linked paper can be used for testing.

@NathanielF
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Just checking @ColtAllen is this the same paper: https://faculty.wharton.upenn.edu/wp-content/uploads/2012/05/Hfw_jof_98.pdf

the brouwer link above doesn't seem to work anymore

image

I think i'd be interesting in looking at this model if the issue is stale?

@ColtAllen
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Hey @NathanielF,

That is the same paper; thanks for finding it. If you want to look into getting this added, that'd be great! The same model could probably even be expanded to support covariates via the approach described in this research note:

https://www.brucehardie.com/notes/019/time_invariant_covariates.pdf

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