Income

group

Food

Clothing

housing

a_i

b_i

a_i

b_i

a_i

b_i

average

0.22

615.10

0.07

58.18

0.06

145.35

(58.32)

(12.17)

(49.38)

(3.01)

(23.95)

(4.40)

lowest

0.37

313.90

0.09

−37.33

0.10

33.54

(40.69)

(7.95)

(44.48)

(−4.19)

(27.66)

(2.11)

difficult

0.43

206.25

0.10

−52.88

0.12

17.44

(42.84)

(5.89)

(48.60)

(−7.48)

(24.78)

(1.05)

lower

0.30

479.55

0.09

−7.52

0.07

97.89

(41.31)

(10.08)

(50.01)

(−0.67)

(20.77)

(4.29)

midlower

0.27

529.98

0.08

11.66

0.07

101.20

(52.93)

(11.66)

51.69

0.81

25.18

4.29

middle

0.25

561.49

0.08

71.51

0.06

133.86

60.43

11.50

50.33

3.91

20.45

3.80

midhigher

0.22

656.72

0.07

118.63

0.06

152.72

65.67

12.26

55.10

5.76

23.63

3.95

higher

0.20

729.14

0.07

130.86

0.06

195.87

64.98

11.17

46.81

4.28

21.82

3.62

highest

0.15

1057.24

0.06

108.20

0.05

363.89

54.60

11.11

39.83

2.09

16.21

3.34