by **Shan** » Tue Feb 11, 2020 9:05 pm

[quote="Michiel Bliemer"]

Hi Michiel,

Many thanks for your detailed reply. Now, I understand that if assuming uncertain priors follow normal distributions, I should use estimated betas in my pilot survey as means and standard errors as standard deviations. I still have two questions regarding to bayesian efficient designs.

1. Many of the estimated coefficients in my pilot survey are not statistically significant. Should I only treat these priors as uncertain priors, or I should treat all priors as uncertain priors?

2. Signs for 3 out of 17 coefficients are unexpected in my pilot survey. If assuming these priors also follow normal distributions, can I assign a very small value , (which has an expected sign) as mean and still use the standard error in pilot survey as standard deviation in bayesian efficient design?

Best,

Shan