This dissertation consists of three chapters that study the effects of government assistance on household behavior and welfare. The first chapter studies the effect of the Housing Voucher Program (Section 8) on household behavior and welfare. Policymakers and researchers continuously debate the optimal structure and scope of the U.S. Housing Voucher Program. The current program features an inverse relation between subsidies and recipients' income, a high degree of rationing, and a limited scope of voucher usage. This chapter studies the effect of the Housing Voucher Program on low-income household behavior and welfare. Using several household datasets, I specify and estimate a lifecycle model that characterizes the effects of housing vouche...