id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cpos-31	Kreyenfeld, Michaela; Scholz, Rembrandt; Peters, Frederik; Wlosnewski, Ines	Ordnungsspezifische Geburtenraten für DeutschlandSchätzungen auf Basis der Perinatalstatistik für die Jahre 2001-2008	2011	19	.pdf	application/pdf	7524	312	58	Order-Specifi c Fertility Rates for Germany • 211 2.3 Variables The variables used in our analysis are age, birth order and region. We corrected this bias by assigning one of the twins the order “one”, the other one the order “two”.4 Table 2 tabulates the distribution of births by birth order and calendar year in our fi nal data set.	cache/cpos-31.pdf	txt/cpos-31.txt