A gamma prior distribution which can be shifted.
shifted_gamma(shape = 1, scale = 1, shift = 0, autoscale = TRUE)Sets the shape and scale parameters of the Gamma prior.
The Gamma prior can be shifted to allow for positive support.
Same as in priors.
A named list to be parsed internally by epim.
rstanarm provides a set of distributions
(see priors) which can be used for the priors
on regression parameters. Intuitively, non-pharmaceutical interventions are
unlikely to a-priori cause a large increase in the reproduction number.
A shifted gamma prior can
be used to model this idea, and has been used in
Flaxman2020;textualepidemia. shifted_gamma can be
used as the prior argument
to epim. This specified a shifted gamma prior on the negative of the
regression parameters. i.e. if there is no shift, the support is on the
negative half of the real line.