An informative prior requires good data… it is a misnomer that Bayesians just “make up” priors, they are generally the result of a past experiment. Indeed a pri

An informative prior requires good data… it is a misnomer that Bayesians just “make up” priors, they are generally the result of a past experiment. Indeed a prior can encode just a hunch or intuition if you have nothing else, but in practice that will be nearly identical to a uniform prior. Personally, I always use a uniform prior unless I am able to cite or present the data that led to something else.