11.   All we can do is go off the old models.

12.   But no one can say whether the old model works.

13.   But the old models have not kept pace with new realities, political analysts say.

14.   But the result is far less sexy than the old model.

15.   Entertainment in recent years has turned the old economic model for success on its head.

16.   Greenspan has consistently resisted pressure to raise rates over the past few years just because the old models have been sending warnings signals.

17.   His free thinking appealed to a new generation eager to break old intellectual models and enticed by the liberating promise of all kinds of change.

18.   His love for old models that led him to start collecting them was unusual.

19.   His reasons have less to do with technology than with the old Gillette model of making money on the blade, not the razor.

20.   In some new subdivisions, computers have replaced the old model home.