Laplace priors on linear regression coefficients, includes normal lasso as a MAP estimate.
Pro: It is easy to derive frequentist LASSO as a MAP estimate from this prior.
Con: Not actually sparse for non-MAP uses.
I have no need for this right now, but I did I might start with Dan Simpson’s critique.
Stan guy, Michael Betancourt introduces some issues with LASSO-type inference for Bayesians with a slant towards Horseshoe-type priors in preference spike and slab, possibly because hierarchical mixtures like spike-and-slab are not that great in Stan, albeit possible.
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