31.   A detailed study of child sexual exploitation in North America has concluded that the problem is far more widespread than was thought.

32.   A detailed study by economists at the Federal Reserve Bank of Dallas concluded that it was probably impossible to pin down the exact error in the price index.

33.   A detailed study has been started to search for causal evidence beyond the data, with no definitive tie yet reported to the incinerator.

34.   A detailed study of how the shuttle would be affected by a strike and what could be done about it should be carried out, he said.

35.   A detailed study of the crash site will also take place and Williams said at least partial reconstruction of the aircraft might be included.

36.   Allied leaders expressed confidence that the cost would be manageable but commissioned a detailed study.

37.   But for those now seeking longer-term sampling and more detailed studies of ecological processes, the problem of sustaining oneself in the air can be a challenge unto itself.

38.   But no one was able to make a detailed study of the aftermath of the fighting.

39.   But the handful of detailed economic studies done in the last several years suggested that American farmers would come out as big losers.

40.   But they have said that they expect to complete a detailed study of a new stadium before the end of the year.