In What’s Mine is Yours, Rachel Botsman argues for the spread of a “collaborative” form of this behavior to replace 20th-century individualistic forms. Interdependence inherent in this behavior is described by James Duesenberry’s “demonstration effect.” An intertemporal theory of this behavior was updated with discounted utility theory (15[1])to form a “smoothing” (15[1])effect (15[2])in Franco (15[1])Modigliani’s (15[1])(*) life-cycle (10[1])hypothesis. (-5[1])This behavior’s marginal propensity (-5[2])is subtracted (10[1]-5[1])from 1 (10[4]-5[1])in formulas (10[1]-5[1])that calculate the fiscal (10[1])multiplier. (10[1]-5[3])A variable that quantifies this behavior (-5[1])is (-5[1])typically the largest factor (10[1]-5[1])in calculating GDP (10[2]-5[1])and positively (10[1]-5[1])correlates with disposable (10[1])income. (10[4])A key (10[1])tenet (10[1])in Keynesian economics (10[1])holds that governments can end recessions through (10[1])this behavior’s (10[1]-5[1])“deficit” (10[1])type. (10[4])For 10 points, (10[1])name this variable often contrasted with saving. (10[2])■END■ (10[11])