31.  But it is starting to dawn on political leaders that they are dealing with economic forces that are impossible to tame or predict.

32.  But Joyner has also become a potent political and economic force who has led several successful boycotts against white companies he felt discriminated against black consumers.

33.  But more fundamental economic forces have also been at work.

34.  But most scholars believe deeper economic forces, rather than weakening commitment to affirmative action, explain most of black economic setbacks.

35.  But some experts expressed doubts about the value of the new slogan and splashy marketing campaign, arguing that economic forces were more significant in determining recruiting results.

36.  But the company has struggled in virtual anonymity, hampered by the limitations of scientific research and by economic forces it could not have foreseen.

37.  But the company said economic forces are to blame.

38.  But their children were influenced by very different economic forces.

39.  But what compells attention is not the bare statistics but the nature of the economic forces at work in the financial district.

40.  Centuries of dominance were snuffed out by racism and economic forces.