21.   Freezing weather prevented more workers from finding jobs in the construction industry, however, stifling the hiring that normally takes place at the end of winter.

22.   Greider, a man of the left, wants to prevent workers from being pitted against each other.

23.   Hourly wages responded to the continued tightness last month by accelerating, helping to prevent workers from losing much ground even though they logged fewer hours.

24.   In Canada, unionized workers are prevented by law from striking before labor contracts expire.

25.   It would prevent state workers from recommending non-chemical alternatives for controlling pests.

26.   Lower courts, for instance, have disagreed about whether mandatory arbitration contracts can prevent workers from filing job-bias lawsuits.

27.   Palestinians, too, oppose the fence, saying it will stifle their economy even more, preventing workers from getting to Israel.

28.   Outdated laws prevent workers from joining labor-management teams to discuss ways to improve productivity and quality.

29.   Republicans also want provisions that would prevent some workers from earning overtime.

30.   Several thousand workers have been prevented from reaching their jobs.