“The Economics of Fertility: A New Era,” Matthias Doepke, Anne Hannusch, Fabian Kindermann, and Michèle Tertilt, April 2022, NBER Working Paper No. The second important empirical observation has been the inverse relationship between women’s participation in the labour force and their fertility levels. Women’s labour and fertility levels In “The Economics of Fertility: A New Era”, researchers Matthias Doepke, Anne …