1.   But without Reform Party presidential nominee Ross Perot included, some experts question whether Clinton and Dole will stick to the issues of importance to the voters.

2.   Commission officials say their survey measures the quality of care, but many experts question whether it adequately measures what is happening at the bedside.

3.   The Justice Department is reviewing the deal and some experts question whether it will allow the DC Air plan to go forward.

4.   The new Costanza study is not really an exercise in green accounting, and some experts question its practical usefulness while others express skepticism about its basic finding.