Panels (a)-(d) present the average log variance, bias, log MSE, and coverage probability for the posterior mean of β11, respectively, as a function of the true value of β11 plotted on the x-axis for the straPP, normalized straPP, power prior, normalized power prior, and reference prior. straPP, scale transformed power prior; NstraPP, normalized straPP; PP, power prior; NPP, normalized power prior; RP, reference prior.