Chapter 23. Families in Macroeconomics Much of macroeconomics is concerned with the allocation of physical capital human capital and labor over time and across people. The decisions on savings education and labor supply that generate these variables are made within families. Yet the family (and decision making in families) is typically ignored in macroeconomic models. In this chapter we argue that family economics should be an integral part of macroeconomics and that accounting for the family leads to new answers to classic macro questions. Our discussion is organized around three themes. We start by focusing on short and medium run fluctuations and argue that changes in family structure in recent decades have important repercussions for the determination of aggregate labor supply and savings. Next we turn to economic growth and describe how accounting for families is central for understanding differences between rich and poor countries and for the determinants of long run development. We conclude with an analysis of the role of the family as a driver of political and institutional change.