This article discusses the appropriate measurement of neighborhood rac
ial integration and proposes a new operational definition. A neighborh
ood is integrated if currently (Ij its stock of households may be clas
sified as ''mixed'' (no single group comprises more than 75% of the ne
ighborhood's population), and (2) the flow of households into and out
of this stock is such that it will be so classified for a decade in th
e future. The article mathematically develops stability boundaries tha
t researchers and policy makers can use to assess the degree to which
contemporaneous flows of households into and out of mixed neighborhood
s will render them integrated in the future.