TESTING STRUCTURAL STABILITY WITH ENDOGENOUS BREAKPOINT - A SIZE COMPARISON OF ANALYTIC AND BOOTSTRAP PROCEDURES

We compare the performance of two alternative approximations to the fi nite-sample distributions of test statistics for structural change, on e based on asymptotics and one based on the bootstrap, We focus on tes ts acknowledging that the breakpoint is selected endogenously-in parti cular, the 'supremum' tests of Andrews (1993). We explore a variety of issues of interest in applied work, focusing particularly on smaller samples and persistent dynamics. The bootstrap approximation to the fi nite-sample distribution appears consistently accurate, in contrast to the asymptotic approximation. The results are of interest not only fr om the perspective of testing for structural change, but also from the broader perspective of compiling evidence on the adequacy of bootstra p approximations to finite-sample distributions in econometrics.