This would involve support to develop statistical methods to both characterize spatial-social volatility in neighbourhoods, as well as identify its potential impact on longitudinal models that incorporate contextual effects. This support also encompasses developing an open source implementation of these statistical methods to serve as the reference-in-praxis, made freely available to all scholars. Further, example data sets constructed to both illustrate the potential for instability and geographies to correct for these problems will be generated. In addition, travel support to discuss, develop, and collect professional feedback on these methods & questions is requested, as well as a postgraduate research assistant to conduct a significant portion of the work in collaboration with the requesting committee.