Domain www.nber.org

Job Identifier	URL
201506042214039aij3	https://www.nber.org/papers/w21178
20150604221611cg4mq	https://www.nber.org/papers/w21178.pdf
201711130002115ighb	https://www.nber.org/data/vital-statistics-natality-data.html
2021030213245573r8j	https://www.nber.org/
202111060741126t2qi	https://www.nber.org/system/files/chapters/c7507/c7507.pdf