IDEAS home Printed from https://ideas.repec.org/a/dem/demres/v12y2005i5.html
   My bibliography  Save this article

Quadratic spline fits by nonlinear least squares

Author

Listed:
  • Carl Schmertmann

    (Florida State University)

Abstract

This web program fits a Quadratic Spline model, as described in Schmertmann (2003; Demographic Research Volume 9, Article 5), to any empirical fertility schedule supplied by the user. The fit minimizes the sum of squared differences between the empirical nfx values and the nfx values from the QS model schedule. Output includes parameter estimates, a graphical depiction of the fitted schedule, and several text reports. Users do not need specialized statistical software or a particular operating system to run the program; the only requirement is a web browser.Softwarehttp://www.demographic-research.org/Volumes/Vol12/5/qsfit/qsfit.html

Suggested Citation

  • Carl Schmertmann, 2005. "Quadratic spline fits by nonlinear least squares," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 12(5), pages 105-106.
    • Handle: RePEc:dem:demres:v:12:y:2005:i:5
    DOI: 10.4054/DemRes.2005.12.5
    as

    Download full text from publisher

    File URL: https://www.demographic-research.org/volumes/vol12/5/12-5.pdf
    Download Restriction: no
    File URL: https://libkey.io/10.4054/DemRes.2005.12.5?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ezra Gayawan & Samson B. Adebayo & Reuben A. Ipinyomi & Benjamin Oyejola, 2010. "Modeling fertility curves in Africa," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 22(10), pages 211-236.
    2. Alina Ștefania CHENIC (CREȚU) & Alin Ioan CREȚU & Laurențiu TEȘCAN, 2018. "A Long Term Analysis of Two Undeniable Realities of the XXI Century - Global Economic Crisis and Demographic Aging," REVISTA DE MANAGEMENT COMPARAT INTERNATIONAL/REVIEW OF INTERNATIONAL COMPARATIVE MANAGEMENT, Faculty of Management, Academy of Economic Studies, Bucharest, Romania, vol. 19(2), pages 196-212, May.

    More about this item

    Keywords

    fertility; fertility models; software; quadratic splines;
    All these keywords.

    JEL classification:

    • J1 - Labor and Demographic Economics - - Demographic Economics
    • Z0 - Other Special Topics - - General

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:dem:demres:v:12:y:2005:i:5. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Editorial Office (email available below). General contact details of provider: https://www.demogr.mpg.de/ .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.