Xiaoming Li defended his PhD dissertation under the supervision of Prof. Ross on Monday, April 25, 2011.

Theoretical models and empirical analyses argue that mortgage underwriting is a dynamic process in which previous mortgage and housing market conditions affect current mortgage approvals. Neighborhoods likely differ in important ways and over important events or shocks that influence both housing prices and mortgage underwriting decisions. This potential endogeneity complicates the causal analyses and failure to control for neighborhood heterogeneity risks confounding spurious and true state dependence. Xiaoming’s dissertation attempts to examine the housing dynamics and distinguish between sources of time persistence on neighborhood mortgage underwriting. Specifically, Xiaoming extends traditional and recently developed dynamic panel data techniques for use of repeated, clustered cross-sectional individual mortgage applications linearly and nonlinearly, respectively.

Xiaoming now heads to Freddie Mac as a Credit & Prepayment Modeling, Senior. We wish him the best of luck!