“…Much of the research into the causes of the baby boom has sought to provide an explanation based on economic factors, particularly in the case of the United States (Russell 2006;Emeka 2006;Murphy, Simon, and Tamura 2008;Tamura, Simon, and Murphy 2016;Jones and Schoonbroodt 2016). These studies give different justifications for this conundrum: Easterlin's hypotheses (1961Easterlin's hypotheses ( , 1965Easterlin's hypotheses ( , 1966Easterlin's hypotheses ( , 1975Easterlin's hypotheses ( , 1987, the relentless rise in real wages (Greenwood, Seshadri, and Vandenbroucke 2005), women's role in the workplace (Doepke, Hazan, and Maoz 2015;Macunovich 1996), the differences in salary between men and women (De Cooman, Ermisch, and Joshi 1987;Doepke, Hazan, and Maoz 2015), the differences in the maternal mortality (Albanesi and Olivetti 2014), and the falling price for space (Tamura and Simon 2017;Simon and Tamura 2009).…”