Dataset: fertil3
Generated on: 2025-08-05
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fertil3               package:wooldridge               R Documentation

fertil3

Description:

     Wooldridge Source: L.A. Whittington, J. Alm, and H.E. Peters
     (1990), “Fertility and the Personal Exemption: Implicit
     Pronatalist Policy in the United States,” American Economic Review
     80, 545-556. The data are given in the article. Data loads lazily.

Usage:

     data('fertil3')
     
Format:

     A data.frame with 72 observations on 24 variables:

        • *gfr:* births per 1000 women 15-44

        • *pe:* real value pers. exemption, $

        • *year:* 1913 to 1984

        • *t:* time trend, t=1,...,72

        • *tsq:* t^2

        • *pe_1:* pe[_n-1]

        • *pe_2:* pe[_n-2]

        • *pe_3:* pe[_n-3]

        • *pe_4:* pe[_n-4]

        • *pill:* =1 if year >= 1963

        • *ww2:* =1, 1941 to 1945

        • *tcu:* t^3

        • *cgfr:* change in gfr: gfr - gfr_1

        • *cpe:* pe - pe_1

        • *cpe_1:* cpe[_n-1]

        • *cpe_2:* cpe[_n-2]

        • *cpe_3:* cpe[_n-3]

        • *cpe_4:* cpe[_n-4]

        • *gfr_1:* gfr[_n-1]

        • *cgfr_1:* cgfr[_n-1]

        • *cgfr_2:* cgfr[_n-2]

        • *cgfr_3:* cgfr[_n-3]

        • *cgfr_4:* cgfr[_n-4]

        • *gfr_2:* gfr[_n-2]

Used in Text:

     pages 358, 377, 378, 397-398, 401, 408, 441, 649, 664-665, 673

Source:

     <https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041>

Examples:

      str(fertil3)