Table 3 Medium-term regression results—sub-sample analysis (Dependent variable: working hours per week in 2000)

Variables

Pollution index in 1997

−1.719***

−1.720***

−0.899

−0.746

(0.417)

(0.418)

(0.865)

(0.863)

Age (in years)

0.0176

0.1997

−0.4006

−0.3965

(0.1868)

(0.1868)

(0.3244)

(0.3239)

Age squared

−0.0024

−0.0024

0.0005

0.0006

(0.0018)

(0.0018)

(0.0029)

(0.0029)

Tenure (in years)

−0.0945

−0.0948

0.1527

0.1550

(0.0715)

(0.0716)

(0.1077)

(0.1074)

Tenure squared

0.0007

0.0007

−0.0033*

−0.0033*

(0.0016)

(0.0016)

(0.0019)

(0.0019)

Years of education

−0.263***

−0.263***

−0.266**

0.266*

(0.069)

(0.069)

(0.135)

(0.135)

Having outside kitchen

−0.0182

−0.0268

0.8171

0.7684

(0.6130)

(0.6132)

(1.1189)

(1.1199)

Having outside water

−2.0247***

−2.044***

−1.5373

−1.4911

(0.7391)

(0.7399)

(1.3262)

(1.3255)

Living in urban location

4.379***

4.387***

5.127***

5.151***

(0.677)

(0.677)

(1.231)

(1.230)

Male

2.009***

2.017***

3.284***

3.166***

(0.648)

(0.648)

(1.097)

(1.102)

Household size

0.1673

0.1651

0.3391

0.3426

(0.1836)

(0.1837)

(0.5234)

(0.5223)

Working hours in 1993

0.269***

0.269***

0.311***

0.313***

(0.019)

(0.019)

(0.032)

(0.032)

Poor GHS

–

−0.019

–

−2.753*

–

(0.891)

–

(1.458)

Constant

36.7447***

36.7194***

44.9515***

44.8031***

(4.646)

(4.646)

(8.838)

(8.845)

Sample size

4790

4788

1736

1736