Table 5:

Parameter Estimates for Empirical Data

Parameter	ZIMLP				RS-ZIMLP
	Est	SE	95% CI		Est	SE	95% CI
Parameters in the Poisson Process (see Equations 23-24)
Fixed Effects
Intercept, γ0	−3.97	0.33	[−4.62, −3.32]		−3.23	0.30	[−4.12, −2.75]
Gender, γ1	−1.02	0.53	[−2.08, 0.01]		−0.95	0.49	[−1.91, 0.02]
Age, γ2	1.23	0.20	[0.83, 1.61]		1.17	0.19	[0.78, 1.55]
Marijuana use, β1	0.01	0.04	[−0.06, 0.09]		0.01	0.03	[−0.06, 0.08]
Cigarette use, β2	0.12	0.04	[0.04, 0.21]		0.10	0.04	[0.02, 0.18]
Random Effects
SD, σv	4.23	0.27	[3.73, 4.78]		3.96	0.24	[3.46, 4.38]
Parameters in the Regime-defining Model (see Equation 27)
Intercept, α0	−0.70	0.04	[−0.78, −0.61]
Bar, α1	0.03	0.04	[−0.04, 0.11]
Menth, α2	−0.03	0.04	[−0.11, 0.04]
Gym, α3	−0.08	0.04	[−0.16, 0.00]
SS, α4	−0.07	0.04	[−0.15, 0.02]
Together, α5	−0.12	0.05	[−0.22, −0.03]
				Parameters in the Initial Regime Model (see Equation 25)
				Intercept, π0	−1.76	0.22	[−2.20, −1.32]
				Parameters in the RS Model (see Equation 26)
			ZI → drinking, Intercept, α10,0		−1.60	0.06	[−1.72, −1.48]
			ZI → drinking, Bar, α10,1		0.01	0.06	[−0.12, 0.12]
			ZI → drinking, Menth, α10,2		0.04	0.06	[−0.08, 0.15]
			ZI → drinking, Gym, α10,3		−0.11	0.06	[−0.24, 0.02]
			ZI → drinking, SS, α10,4		0.00	0.07	[−0.14, 0.14]
			ZI → drinking, Together, α10,5		0.01	0.07	[−0.12, 0.16]
			drinking → ZI, Intercept, α01,0		−0.44	0.07	[−0.58, −0.30]
			drinking → ZI, Bar, α01,1		−0.08	0.08	[−0.24, 0.07]
			drinking → ZI, Menth, α01,2		0.06	0.07	[−0.08, 0.21]
			drinking → ZI, Gym, α01,3		0.12	0.08	[−0.03, 0.28]
			drinking → ZI, SS, α01,4		0.12	0.09	[−0.06, 0.28]
			drinking → ZI, Together, α01,5		0.18	0.09	[0.01, 0.36]
Parameters in the Covariate Model (see Equation 14)
Marijuana use
ϕ x 1	0.12	0.01	[0.10, 0.14]		0.12	0.01	[0.09, 0.14]
σ x 1	0.46	0.00	[0.45, 0.46]		0.46	0.00	[0.45, 0.46]
Cigarette use
ϕ x 2	0.25	0.01	[0.23, 0.27]		0.25	0.01	[0.23, 0.27]
σ x 2	0.45	0.00	[0.44, 0.45]		0.45	0.00	[0.44, 0.45]
Time spent at bars
ϕ z 1	0.11	0.01	[0.09, 0.12]		0.11	0.01	[0.09, 0.12]
σ z 1	0.98	0.01	[0.97, 0.99]		0.98	0.01	[0.97, 0.99]
Time spent at mental health services
ϕ z 2	0.03	0.01	[0.02, 0.05]		0.03	0.01	[0.02, 0.05]
σ z 2	0.97	0.01	[0.96, 0.98]		0.97	0.01	[0.96, 0.98]
Time spent at gyms
ϕ z 3	0.09	0.01	[0.08, 0.11]		0.09	0.01	[0.08, 0.11]
σ z 3	0.98	0.01	[0.97, 0.99]		0.98	0.01	[0.97, 0.99]
Shared space with twin siblings
ϕ z 4	0.32	0.01	[0.31, 0.33]		0.32	0.01	[0.31, 0.33]
σ z 4	0.86	0.00	[0.85, 0.87]		0.86	0.00	[0.85, 0.87]
Time spent with twin siblings
ϕ z 5	0.29	0.01	[0.27, 0.31]		0.29	0.01	[0.27, 0.31]
σ z 5	0.94	0.01	[0.93, 0.95]		0.94	0.01	[0.93, 0.95]