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. Author manuscript; available in PMC: 2015 Sep 21.
Published in final edited form as: J Econ Lit. 2015 Sep;53(3):503–570. doi: 10.1257/jel.53.3.503

Figure 6.

Figure 6

Birth Weights by Parity

Source: Author’s calculations from the records of New York Lying-In (Costa 1998), Johns Hopkins (Costa 2004), and NCHS’s 1968, 1978, 1998, and 2008 Vital Statistics Natality Data.