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Table 7 Selected baseline covariates used in logit estimation for the propensity score before and after matching (group B)

From: Women’s employment, income and divorce in West Germany: a causal approach

 

Raw sample

Matched sample

Treated

Control

ND

Treated

Control

ND

At t0

 Age

40.41

39.89

0.07

40.41

40.36

0.01

 Age difference to spouse

2.73

2.67

0.02

2.73

2.84

− 0.02

 Marriage duration

16.50

15.52

0.13

16.50

16.53

0.00

In t−729 to t−365

 Childbirth (one if yes)

0.00

0.00

NA

0.00

0.00

NA

At t−730

 Number of child 0–2

0.04

0.11

− 0.39

0.04

0.03

0.04

 Number of child 3–5

0.04

0.09

− 0.28

0.04

0.03

0.04

 Number of child 6–15

0.66

0.67

− 0.01

0.66

0.62

0.04

 Number of child 16 and older

0.51

0.52

− 0.01

0.51

0.53

− 0.03

In t−1094 to t−730

 Days schooling (higher)

0.00

0.00

NA

0.00

0.00

NA

 Days vocational training

0.00

0.00

NA

0.00

0.00

NA

 Days care

1.86

1.20

0.03

1.86

2.78

− 0.05

 Days parental leave

88.39

133.00

− 0.29

88.39

82.04

0.04

 Days work disability

3.28

1.91

0.09

3.28

3.21

0.01

 Days unemployed

6.74

8.69

− 0.05

6.74

5.18

0.04

 Days employed (marginal)

3.12

4.17

− 0.04

3.12

1.62

0.05

 Days employed (regular)

344.89

333.45

0.16

344.89

346.30

-0.02

 Daily income (marginal)

0.14

0.21

− 0.06

0.14

0.08

0.06

 Daily income (regular)

56.00

54.83

0.04

56.00

56.58

− 0.02

 Yearly income (marginal)

30.13

24.73

0.02

30.13

15.45

0.05

 Yearly income (regular)

19,681.67

18,539.90

0.11

19,681.67

19,881.25

− 0.02

From first record to t−730

 Lifetime days schooling (higher)

393.00

348.57

0.06

393.00

398.00

− 0.01

 Lifetime days vocational training

534.91

585.07

− 0.10

534.91

529.90

0.01

 Lifetime days tenure

4931.96

4989.86

− 0.02

4931.96

4960.00

− 0.01

 Lifetime days tenure (yearly)

250.76

261.38

− 0.13

250.76

251.46

− 0.01

Case numbers

134

328

 

112

293

 
  1. Mean values for selected covariates (baseline). ND is the normalized difference: \( \frac{{x_{t} - x_{c} }}{{\sqrt {\frac{{V_{xt} + V_{xc} }}{2}} }} \) with \( V_{xt} = \frac{1}{{\left( {N_{t} - 1} \right)}}*\mathop \sum \nolimits_{i = 1}^{{N_{t} }} \left( {x_{it} - \overline{x}_{t} } \right)^{2} \) (Vxc respectively) (Rosenbaum and Rubin 1985). Matched sample is based on kernel matching (Epanechnikov) with h = 0.038. Lifetime days tenure (yearly) is calculated by: Lifetime days tenure/[age-16-(lifetime days school/365)-(lifetime days training/365)]. T0 is the day the divorce file was opened. Case numbers for the raw and matched sample deviate because some cases are lost by kernel matching under the chosen bandwidth