21.  Until better data come along, Vinocur said, individuals may want the professional management and diversification of real estate mutual funds.

22.  When reports minimized the extent of school violence, he disavowed them and demanded better data.

23.  Witness, for example, the painful progress toward better data collection.

24.  Without better flight data, however, the investigation has been difficult, and nothing has been proven.

25.  If there were better data on such violence, for example, workers could be better prepared to prevent it, he said.

26.  If nothing else, Kruse said, the study makes a strong case for developing better data on the employment of children.

27.  State officials say better data collection should heighten awareness and lessen mistakes.

28.  The revised GDP estimate is based on better data.

29.  The revised numbers are based on better data.

30.  But the specialists admit that an accurate assessment of causes is difficult without better data and is hindered because drug issues are a traditional taboo.