******************	Wood & Neels
******************	Demographic Research												******************
******************	THE EDUCATIONAL GRADIENT OF CHILDLESSNESS AND COHORT PARITY PROGRESSION IN EUROPE AND AUSTRALIA			******************
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* The .zip file "demographic-research.31-46" includes:

1. 	.dta data files for 13 (out of 14) countries used in the article "Wood J., Neels K. The educational gradient of childlessness and cohort parity 
	progression in Europe and Australia, Demographic Research. Variables:
	recby		Year of birth respondent
	arid 		person identificator
	exposure 	years of exposure
	event 		event (indicated by value 1)
	age_tv 		age (time-varying)
	first 		indicates whether or not the person is at risk of having a first birth
	second		indicates whether or not the person is at risk of having a second birth 
	third 		indicates whether or not the person is at risk of having a third birth
	exposure_square years of exposure (quadratic)
	low 		low level of education
	medium 		medium level of education
	high 		high level of education
	cohort1 	born 1940-1944
	cohort2 	born 1945-1949
	cohort3 	born 1950-1955
	cohort4		born 1956-1961

	*Other variables included in the data are multiplications/interactions between variables explained above.

2. 	Annotated code which allows the reader to calculate descriptive statistics (Table 1, Table A.1) and estimate models displayed in table 2.

* In order to be able to replicate Figures 1-3, Table 3, and Tables A.2-A.4 the reader needs to use the estimated hazards to calculate Cohort Parity 
Progression Ratios (see Hinde, 1998)

Hinde, A. (1998). Demographic Methods, Arnold.