1 Quality and stability of the relationship as a function of distribution of housework, financial investments, and decision making between partners Željka Kamenov, Margareta Jelić, Meri Tadinac, Ivana Hromatko Department of Psychology University of Zagreb Faculty of Humanities and Social Sciences Zagreb, Croatia Running head: investment and relationship quality and stability Correspondence to be addressed to: Željka Kamenov Department of Psychology University of Zagreb Faculty of Humanities and Social Sciences I. Lučića 3 10000 Zagreb e-mail: zkamenov@ffzg.hr