11.   She says the study compares apples with oranges.

12.   Studies are under way comparing the value of a relatively new drug, tamoxifen.

13.   The newest study will compare the effectiveness of three different regimens after two years of therapy and then again after three years of therapy.

14.   The studies systematically compared antidepressant medication with psychotherapy.

15.   The studies typically compared the abortion histories of a group of women who had breast cancer with a group of comparable women who did not.

16.   The study also compared the cost of the Manhattan Project with other World War II expenditures.

17.   The study compared paychecks, taking into account tenure, degrees, rank and the like.

18.   The study compares incomes of poor and affluent households with children.

19.   The studies compared the effectiveness of various types of online ads, whether plain-old banner ads or ads with new, larger formats.

20.   The study also compared French-speaking West Africa with its English-speaking neighbors.