This book is A Dissertation Presented to the Faculty of the College of Business Administration of Trident University International in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Consumer Behavior.Abstract: Numerous studies have established links between household debt and a long list of negative outcomes. Furthermore, economic data shows that the phenomena of household debt has been getting steadily worse. These findings have motivated researchers to seek constructs that may help predict the future accumulation of debt. One such construct is Financial Socialization. It has been determined that what a child sees and is taught regarding financial behavior, in his home, will effect his or her financial behavior as an adult. In spite of this finding, it is unclear why siblings of the same families display such different financial behavior. In an attempt to answer this question, the construct of birth order was introduced into the previously developed model. Birth order has been empirically tested for correlation to hundreds of dependent variables yet not to debt accumulation or home financial socialization. Data was collected from families who had been in contact with Paamonim, an Israeli NFP organization. The financial socialization and birth order data was collected using a questionnaire while the financial data was collected from the NFP database. Linear regression and ordinal logit regression were used to determine the statistical relationship between birth order and household debt. Likewise linear regression was used to test the relationship between birth order and Home Financial Socialization.The results showed a significant statistical relationship between birth order of husbands and the debt accumulation of the family. First born male children exhibited significantly less household debt than later born children. On the other hand, no correlation was found between birth order and Home Financial Socialization. This implies that the construct of birth order effects financial behavior directly and independent of financial socialization. It was also found that the birth order of the women in this study were not statistically linked to the household debt. This indicated that the husband’s attributes are more dominate than the wives in determining household financial behavior.