. Author manuscript; available in PMC: 2013 Oct 23.

Published in final edited form as: Rev Econ Stat. 2009 Jan 28;91(1):52–65. doi: 10.1162/rest.91.1.52

Table II.

Main Results

	Estimates on 1910 Hookworm * Post
Dependent Variables:
Panel A: Quality (Human Capital)
School enrollment	0.0827 (0.0220)
Regular school attendance	0.1565 (0.0254)
Literacy	0.0500 (0.0200)
Panel B: Quantity (Fertility)
Children less than five years old	−0.1023 (0.0239)
At least one child less than five years old	−0.0529 (0.0127)
At least one child less than one year old	−0.0330 (0.0110)
Total number of children	−0.1554 (0.0542)
At least one child	−0.0381 (0.0135)

Notes: Each cell reports estimated coefficients on the interaction pre-campaign hookworm infection rate with the post-period indicator (year=1920) for various fertility and human capital measures as dependent variables. The specification corresponds to equation (1) described in the text. The reported specifications include county-group (SEA) fixed effects as well as fully interacted sets of Age, Race, Region, and Post-period indicators. Standard errors (clustered on SEA) are reported in parentheses. All coefficients are statistically significant at the 1% level. Sample consists of females in the IPUMS between the ages of 15 and 49 in the RSC-surveyed geographic units for 1910 and 1920.