“…To name only a few papers, see for example Bhattacharya and Brockwel (1976), Bhattacharya (1987), Bhattacharya and Frierson (1981), Carlstein (1988), Cs6rg6 and Horvhth (1987, 1988a, 1988b, Darkhovskh (1976), Deshayes and Picard (1981), Diimbgen (1991), Hinkley (1970), Lombard (1987), Lorden (1971), Page (1954Page ( , 1955, Pettitt (1979) or Siegmund (1988). Most of these papers have one feature in common: They do not investigate the power of the tests.…”