Variable	Parameter	Posterior Mean (95% CrI)
Intercept  Study Period  Study Group  Period x Group  Education (0 = < HS, 1= > HS)  Race (0=white, 1=other)	β1 β2 β3 β4 β6	-0.56 (-0.95, -0.15) -0.11 (-0.58, 0.34) 0.16 (-0.33, 0.66) 0.74 (0.11, 1.43)* -0.21 (-0.41, -0.02) 0.11 (-0.12, 0.33)
Random Intercept Variance Random Slope Variance Covariance	Σ11 Σ22 Σ12	0.35 (0.18, 0.64) 0.51 (0.18, 1.10) 0.06 (-0.20, 0.29)
* Pr(β4 > 0\y,y0) = 0:99.
Table 4: Posterior estimates for EPP model with a0 = 1.