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Variation in U.S. Fertility: Low and Not so Low, but Not Lowest-Low

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Low and Lower Fertility

Abstract

Unlike most other developed countries, the United States has not experienced sustained periods with fertility well below the replacement level. Thus, government policy is not directed toward increasing or decreasing overall levels of fertility. There is substantial fertility variation in the United States, however, by state/region, level of religiosity, level of education, and race/ethnicity. No group has “lowest-low” fertility (i.e., a total fertility rate (TFR) of less than 1.3 children per woman), but sub-groups do have rates as low as Europe as a whole (i.e., 1.6 for EU-27 in 2008). We describe the intermediate variables (the demographic regime) producing both the level and variation in U.S. fertility. Further, we locate the causes of these intermediate variables in the social structures that define them and determine their strength and variation. The cumulative U.S. evidence suggests that lowest-low fertility is not an inevitable feature of economically advanced societies and demonstrates that the general frameworks we propose are useful for understanding levels and variation in low fertility.

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Notes

  1. 1.

    Bongaarts and Potter (1983) build on the classic Davis and Blake (1956) framework.

  2. 2.

    If one combines the estimated effects of the factors FU, FR, FSP and FT, FI, FC, then their cumulative effect is approximately 10 %—TFR/DFS = .90. This is what one observes in the NLSY-79 data. Young women intend an average of approximately 2.2 children but have only 2.0.

  3. 3.

    An exception is FT. Logically, the postponement of fertility cannot be maintained forever. Over the past few decades, however, ages at first and second birth have increased by only about 0.1 year, and this increase could easily be maintained for several more decades. Other parameters are often expected to change. FU, the level of unwanted births, is often assumed to be anachronistic in a context of wide availability of effective contraceptives. This parameter is largely unchanged over the past three decades, however, indicating that it is not driven by the availability of contraception but rather by effective contraception use and the acceptability of abortion should it fail. See discussion in Technical Panel on Assumptions and Methods (2011).

  4. 4.

    Pollard and Morgan (2002) argue that this preference for a balanced gender composition has declined in recent decades. A recent paper by Tian and Morgan (2014) extends the time series of estimates and provides further support for the declining significance of gender-balance preference in the United States.

  5. 5.

    Frejka and Westoff (2008) do not explore the proximate causes of the European religious gradient.

  6. 6.

    Intended parity is the sum of children one has and the number of additional children intended.

  7. 7.

    Alternatively, the experience of the cohorts in the NLSY 1979 (the birth cohorts born in the 1955–1964 decade) may have become calcified, a stalled gender revolution (England 2010).

  8. 8.

    Mosher et al. (2012, Table 1) show the percentage of unwanted births among non-Hispanic whites and African Americans as 6.4 % and 11.7 %, respectively, a difference of 5.3 %. African American fertility is 8 % higher than that of whites. Thus, unwanted fertility can account for 66 % of the higher African American TFR.

  9. 9.

    To illustrate the diversity within the Hispanic population, Cuban Hispanics’ 2011 TFR was only 1.43, while that for “other Hispanics” was 2.87.

  10. 10.

    Personal correspondence, 13 Jan 2014.

  11. 11.

    The obvious exception is the relatively rare case of multiple births.

  12. 12.

    See http://www.healthypeople.gov/2020/topicsobjectives2020/overview.aspx?topicid=13

  13. 13.

    The U.S. poverty line in 2014 is an annual income of $24,000 for a family of four. The working poor and near poor would consist of families that earn approximately $10,000 to $45,000 a year for a family of four.

  14. 14.

    For limits to the EITC in 2014, see: http://www.irs.gov/Individuals/Preview-of-2012-EITC-Income-Limits,-Maximum-Credit--Amounts-and-Tax-Law-Updates

  15. 15.

    For limits to the child tax credit in 2014 see: http://www.irs.gov/uac/Ten-Facts-about-the-Child-Tax-Credit

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Correspondence to S. Philip Morgan .

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Morgan, S.P. (2015). Variation in U.S. Fertility: Low and Not so Low, but Not Lowest-Low. In: Rindfuss, R., Choe, M. (eds) Low and Lower Fertility. Springer, Cham. https://doi.org/10.1007/978-3-319-21482-5_7

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