11.   All other studies have come from proponents of charter schools, or have merely measured what parents think of the schools.

12.   Both studies came under fire.

13.   But a new study has come with another explanation.

14.   But now comes a study by Nielsen, commissioned by the Discovery Channel, that indicates otherwise.

15.   But the Lott and Mustard study has come under fire from equally competent academics.

16.   But the study also quickly came under attack from several quarters, in part a reflection of how heated the debate over vouchers has become.

17.   Earlier studies have come to varying conclusions about age, obesity and death.

18.   Forest Service officials acknowledge the study came after pressure from environmental groups to evaluate the impact of chip mills on Southern forests.

19.   Hathcock said that an epidemiological study came out about a month ago linking folic acid in the diet with protection from colon cancer.

20.   How do we do that when every week new research studies come out that contradict themselves?