The Local Power of the CUSUM and CUSUM of Squares Tests
CUSUM 与平方 CUSUM 检验的局部功效
We consider the local power of the cusum and cusum of squares tests for structural change in the linear regression model. We show that the local power of the cusum of squares test equals its size for a wide class of structural changes, as compared to a nontrivial local power for the cusum test. The conventional ranking of these procedures is thus reversed.