Table 4: Posterior mean, standard deviation, and 95% credible intervals of parameters from zibop for smoking and chewing tobacco.

Variable MeanSt. dev.2.50%Median97.50%

Main (β 1,α 1): smoking ( 𝑦 1 ):
Age/100.6720.1190.4440.685
Age square/100−0.0700.012−0.093−0.071
Education−0.0710.014−0.097−0.071
Education square0.0010.001−0.0020.001
Income0.0000.002−0.0050.000
Male2.0920.0861.9252.091
Married0.2130.0700.0740.213
Muslim−0.0530.052−0.157−0.053
Region−0.0070.048−0.102−0.007
Urban−0.0960.051−0.198−0.097
Agriservice−0.2340.056−0.345−0.233
Self-employed−0.2460.087−0.414−0.247
student−0.4760.137−0.742−0.478
α 120.2840.0170.2520.283
α 130.9870.0300.9280.987

Main (β 2,α 2): chewing ( 𝑦 2 )
Age/100.6490.1330.3820.658
Age square/100−0.0460.013−0.071−0.046
Education−0.0200.016−0.052−0.020
Education square−0.0020.001−0.005−0.002
Income0.0010.003−0.0040.002
Male−0.4790.081−0.641−0.479
Married−0.0250.075−0.171−0.025
Muslim−0.0720.056−0.181−0.072
Region0.4170.0510.3170.418
Urban−0.0800.058−0.194−0.079
Agriservice0.0520.074−0.0960.052
Self-employed0.1270.092−0.0580.126
Student−0.4500.221−0.887−0.448
α 220.4840.0230.4390.484

Inflation (γ):
Age/10−0.0122.044−4.7550.253
Age square/1000.5090.552−0.1970.398
Education−0.2180.115−0.476−0.204
Education square0.0280.0110.0100.026
Income0.0060.022−0.0270.003
Male0.2390.827−1.5820.417
Married2.3064.478−0.4160.500
Muslim−0.5280.356−1.331−0.494
Mother−0.1700.267−0.716−0.164
Father−0.1190.330−0.664−0.160
Region0.6300.2910.0610.625
Urban0.0400.357−0.7370.071
Agrservice5.3125.4161.0172.674
Self-employed3.7835.0250.1241.275
Sstudent−0.3440.411−1.154−0.339
ρ 12−0.1850.033−0.249−0.186

Select probabilities:
𝑃 ( 𝑦 1 = 0 )0.7600.0040.7520.760
𝑃 ( 𝑦 2 = 0 )0.8710.0040.8640.871
𝑃 ( 𝑦 1 = 0 , 𝑦 2 = 0 )0.6620.0050.6520.662
𝑃 (zero-inflation)0.2420.0480.1510.243

Results for the constant terms in the main and inflation parts have been suppressed for brevity.