A Forbes columnist writes:
"Gruber really does have one of the greatest empirical minds in health economics. When he’s not wearing his advocacy hat, I pretty much take what he says as gospel."
His inclination to truthfulness
depends on what he wears.
When there's a scholarly hood on his head
believe whatever he swears.
But when his fedora says "advocate",
take all with a grain of salt.
And blame it, please, upon the hat.
The fudging's not his fault!