Table 5.

Decomposition of the Erreygers index according to demographic variables.

Variables	B	Concentration Index	Elasticity	Contribution	%
Age
18–29
30–39	0.064	−0.033	0.027	−0.002	−2.1
40–49	0.136	0.011	0.043	0.001	1.2
50–59	0.236	0.017	0.065	0.002	2.6
≥60	0.294	−0.008	0.105	−0.002	−2.1
Gender
Female
Male	−0.073	−0.045	−0.080	0.007	8.6
Marital status
Unmarried
Married	0.076	0.002	0.099	0.000	0.5
Education level
Below primary school
Primary school	0.012	−0.146	0.003	−0.001	−0.9
Intermediate school	0.042	−0.033	0.014	−0.001	−1.1
Secondary school	0.034	0.069	0.023	0.003	3.8
Higher Education	0.064	0.261	0.026	0.013	16.0
Nationality
Non-Saudi
Saudi	0.020	0.110	0.030	0.007	7.8
Monthly income (Saudi Riyal)
?3,000
3,000 to <5,000	0.155	−0.034	0.020	−0.001	−1.6
5,000 to <7,000	−0.012	−0.257	−0.001	0.000	0.5
7,000 to <10,000	−0.023	0.120	−0.002	−0.001	−0.7
10,000 to <15,000	0.114	0.136	0.021	0.006	6.7
15,000 to <20,000	0.286	0.136	0.038	0.010	12.1
20,000 to <30,000	0.023	−0.039	0.003	0.000	−0.2
≥30,000	−0.075	−0.293	−0.011	0.006	7.6
Health insurance
Uninsured
Insured	0.141	−0.050	0.090	−0.009	−10.7
Health status
Very bad
Bad	−0.042	−0.166	−0.003	0.001	1.1
Mediocre	−0.043	−0.061	−0.009	0.001	1.3
Good	−0.222	0.017	−0.093	−0.003	−3.6
Very good	−0.453	0.009	−0.598	−0.010	−12.3
Region
Riyadh
Albaha	0.023	−0.157	0.008	−0.002	−2.9
Aljoof	−0.053	−0.014	−0.004	0.000	0.1
Aseer	0.177	−0.252	0.013	−0.006	−7.6
Eastern Region	0.165	0.330	0.037	0.024	28.7
Haiel	0.032	−0.119	0.004	−0.001	−1.2
Jazan	−0.069	−0.045	−0.076	0.007	8.1
Madenah	0.067	−0.033	0.028	−0.002	−2.2
Mekkah	0.132	0.011	0.042	0.001	1.1
Najran	0.227	0.017	0.063	0.002	2.5
Northern Border	0.282	−0.008	0.100	−0.002	−2.0
Qassim	0.006	−0.146	0.001	0.000	−0.5
Tabuk	0.029	−0.033	0.010	−0.001	−0.7
Explained inequality				0.047	57.9
Overall inequality				0.083
Residual				0.036