Table 10.

Marginal effects of the variables used in the model on quality parameter.

	Marginal effects	t-statistics	95% Confidence Interval
Fairness of the PPR vaccine prices
Pr(qv = 0), Independent variable = 1	0.065	0.000	0.036	0.095
Pr(qv = 1), Independent variable = 1	0.030	0.004	0.010	0.050
Pr(qv = 2), Independent variable = 1	0.139	0.000	0.010	0.181
Pr(qv = 3), Independent variable = 1	0.765	0.000	0.715	0.815
Benefit awareness
Pr(qv = 0), Independent variable = 1	0.117	0.000	0.084	0.150
Pr(qv = 1), Independent variable = 1	0.029	0.002	0.010	0.047
Pr(qv = 2), Independent variable = 1	0.122	0.000	0.086	0.158
Pr(qv = 3), Independent variable = 1	0.733	0.000	0.684	0.781
Production system
Pr(qv = 0), Independent variable = 2	0.151	0.000	0.110	0.192
Pr(qv = 1), Independent variable = 2	0.033	0.002	0.012	0.054
Pr(qv = 2), Independent variable = 2	0.137	0.000	0.096	0.178
Pr(qv = 3), Independent variable = 2	0.679	0.000	0.619	0.739
Some vaccines more important than others
Pr(qv = 0), Independent variable = 1	0.081	0.000	0.046	0.116
Pr(qv = 1), Independent variable = 1	0.018	0.008	0.005	0.031
Pr(qv = 2), Independent variable = 1	0.083	0.000	0.047	0.119
Pr(qv = 3), Independent variable = 1	0.818	0.000	0.751	0.885