The document describes Gary Becker's theoretical models of marriage. At the micro level, these are all models of rational choice. At the market level, Becker offers two main types of models: partial equilibrium models based on price theory. Becker compares sociology and economics from an economic perspective, analyzing how economic choices shape human behavior. In one of his statements, Becker says that the economic approach can be applied to all human behavior, regardless of whether it involves money, decisions that are frequent or infrequent, large or small decisions, emotional or mechanical goals, rich or poor people, men or women, adults or children, brilliant or stupid individuals, patients or therapists, businessmen or politicians, teachers or students.