Retaining effective teachers is a key policy priority nationwide, particularly in districts that
serve large numbers of disadvantaged students. We investigate whether a change in the
Miami region's Teach for America (TFA) placement strategy was accompanied by changes
in teacher attrition and mobility decisions. Our results suggest that the increased
concentration of TFA corps members in schools was associated with a reduction in TFA
mobility across schools after the first year of service, but showed no association with the …

We examine the extent to which clustering large numbers of Teach For America (TFA) corps
members in a limited number of low-performing schools was accompanied by changes in
teacher mobility decisions. Using longitudinal data from Miami-Dade spanning six school
years, augmented with survey responses from TFA's own Alumni Survey for cohorts placed
in the Miami region, we use Cox proportional hazards models and multinomial logit decision
models in a modified difference-in-difference (DD) framework. Our results suggest that the …