<?xml version="1.0" encoding="UTF-8"?>
<oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:title>Fertility Models</dc:title>
  <dc:title>R package fertilmodel version 1.5</dc:title>
  <dc:description>Four fertility models are fitted using non-linear least squares. These are the Hadwiger, the Gamma, the Model1 and Model2, following the terminology of the following paper: Peristera P. and Kostaki A. (2007). "Modeling fertility in modern populations". Demographic Research, 16(6): 141--194. &lt;doi:10.4054/DemRes.2007.16.6&gt;. Model based averaging is also supported.</dc:description>
  <dc:type>Software</dc:type>
  <dc:relation>Depends: R (&gt;= 4.0)</dc:relation>
  <dc:relation>Imports: nnsolve, stats</dc:relation>
  <dc:relation>Suggests: Rfast, Rfast2</dc:relation>
  <dc:creator>Michail Tsagris &lt;mtsagris@uoc.gr&gt;</dc:creator>
  <dc:publisher>Comprehensive R Archive Network (CRAN)</dc:publisher>
  <dc:contributor>Michail Tsagris [aut, cre]</dc:contributor>
  <dc:rights>GPL (&gt;= 2)</dc:rights>
  <dc:date>2026-03-25</dc:date>
  <dc:format>application/tgz</dc:format>
  <dc:identifier>https://CRAN.R-project.org/package=fertilmodel</dc:identifier>
  <dc:identifier>doi:10.32614/CRAN.package.fertilmodel</dc:identifier>
</oai_dc:dc>