Econometrics of Structural Change

The point of departure of most studies in this volume is the standard linear regression model Yt = x;fJt + U (t = I, ... The null hypothesis of most tests for structural change is that fJt = fJo for all t, i.e. that fJt = fJo (t< t*), and fJt = fJo + t1fJ (t"?:.