Mongolia’s livestock has more than doubled since the 1990’s, degrading grazing lands and other common-use infrastructure, which in turn reduced herder income. The Peri-Urban Rangeland Project (PURP) aims to mitigate overgrazing damage and improve herder welfare by encouraging sustainable land-management practices, leasing out private rangeland, and assisting with infrastructure construction. PURP’s impact on herder incomes and rangeland productivity will be assessed by matching those herders that participated in PURP with those in similar circumstances that did not and comparing them.