“…He stresses that it is not only the economic and emotional costs of having children that influence individuals' fertility decisions, but also larger sociocultural, ideological, institutional and political factors that shape parental responsibilities and ideas about family size. Importantly, this does not imply that each of these factors is the universal driver of any fertility decline, but rather that these political, cultural, ideological and social forces and events must be considered at the level of local communities that experience changes that are specifically relevant for them (Hilevych, 2016b;Kreager & Bochow, 2017;Rusterholz, 2017;Szreter, 2015). In addition, we do not consider couples who assess the 'perceived relative costs of childrearing' as homogeneous 'black boxes'; rather, we believe that this appraisal may differ between wives and husbands (Greene & Biddlecom, 2000;Janssens, 2007;Mackinnon, 1995;Praz, 2007;Watkins, 1993).…”