Good day sir,

Please I need assistance on this !.

I am trying to find priors for some of parameters in my equation. I could not find any from existing studies. I decided to estimate the equations that contain those estimate. After the estimation of regression. I found some of the coefficient to be negative number. my question is is my approach to get prior values correct and can the negative values be use as prior. If yes, which type of probability distribution will I choose for such priors with negative values. thank you.