Feature request: Option for a non-normal likelihoods

[markjrieke]

Currently, the model specification is that of a normal likelihood. It'd be potentially useful to add options for other likelihoods --- like a lognormal, gamma, or poisson (for unbounded count outcomes). These would give a bit more flexibility in model specification at the user level while mechanically enforcing 0 as a lower bound for the outcome. I imagine that the lognormal would be the most straightforward to implement, but the others would also be useful as roadmap items in the future.

[gousesb]

Hello @markjrieke ,

Thank you for contacting us!

Meridian currently offers both LogNormal and Normal distributions for the media effects and has options to customize all the parameters with various distributions. We appreciate your suggestion to include other likelihood distributions and will consider the option to add more distributions for media effects as we continue updating the package.

You can track the previous changes to Meridian and unreleased feature updates in our Change Log.

Do reach out if you have any questions or suggestions regarding Meridian.

Google Meridian Support Team

[markjrieke]

@lukewang-aofl