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  "Description": "Four fertility models are fitted using non-linear least\nsquares. These are the Hadwiger, the Gamma, the Model1 and\nModel2, following the terminology of the following paper:\nPeristera P. and Kostaki A. (2007). \"Modeling fertility in\nmodern populations\". Demographic Research, 16(6): 141--194.\n<doi:10.4054/DemRes.2007.16.6>. Model based averaging is also\nsupported.",
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      "title": "This is an R package that fits 4 fertility models.",
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