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Table 3 Multiple logistic regression of male birth

From: Economic stress or random variation? Revisiting German reunification as a natural experiment to investigate the effect of economic contraction on sex ratios at birth

 

Model 1

Model 2

Model 3

 

OR

(SE)

OR

(SE)

OR

(SE)

(Constant)

1.066***

(.001)

1.070***

(.003)

1.072***

(.003)

Unemployment change, lag 4 (t-7:t-4), in percent

1.003***

(.001)

1.002

(.001)

1.002

(.001)

Birth in 1991 (1 = yes)

1.008***

(.003)

1.007**

(.003)

1.007**

(.003)

Birth in East Germany (1 = yes)

.996*

(.002)

.998

(.002)

.991*

(.004)

Birth in 1991*East Germany

.985*

(.007)

.987

(.008)

.986

(.008)

Mother employed (1 = yes)

  

1.005***

(.001)

1.005***

(.001)

Non-marital birth (1 = yes)

  

.993***

(.001)

.993***

(.001)

Mother’s age at birth:

 15-19

  

1.002

(.003)

1.002

(.003)

 20-24

  

.997*

(.002)

.997*

(.002)

 25-29

  

Reference group

Reference group

 30-34

  

.999

(.002)

.999

(.001)

 35-39

  

.995**

(.002)

.995**

(.002)

 40 and older

  

.993

(.004)

.993*

(.004)

Mother is German (1 = yes)

  

1.000

(.002)

1.000

(.002)

Month of birth

 January

  

.999

(.003)

.999

(.003)

 February

  

.993*

(.003)

.993*

(.003)

 March

  

.992**

(.003)

.992**

(.003)

 April

  

.998

(.003)

.997

(.003)

 May

  

.997

(.003)

.997

(.003)

 June

  

Reference group

Reference group

 July

  

1.000

(.003)

1.000

(.003)

 August

  

.997

(.003)

.997

(.003)

 September

  

.993*

(.003)

.993*

(.003)

 October

  

.996

(.003)

.996

(.003)

 November

  

.995

(.003)

.995

(.003)

 December

  

.997

(.003)

.997

(.003)

Fixed effects: German states

-

Not included

Included

N

13 863 433

13 863 202

13 863 202

AIC

19 200 000

19 200 000

19 200 000

  1. Data sources: German Birth Register 1991–2010[54] and Federal Employment Agency; East and West Germany (Berlin excluded), own calculations; unemployment data for 1990 partly based on secondary sources and imputations; ***p < .001, **p < .01, *p < .05.