"Everything today has a computer in it, " says Al Lee, director of quantitative analysis at PayScale.com, an online compensation comparison tool.

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"Starting salaries do not tell you a whole lot, but there is a real divergence in dollar terms as you go over the course of a career, " says Al Lee, director of quantitative analysis at PayScale.com.

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While it would be a formidable task to check every study Wagenaar et al. subsumed in their meta-analysis, a quick check to find out whether they included a study with a known systematic bias reveals the study included Chesson et al., a study by the Centers for Disease Control which claimed that increased beer taxes could reduce the rate of gonorrhea.

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John Kringen, who heads the CIA's analysis directorate, echoed the concerns about al-Qaida's resurgence during testimony and conversations with reporters at a House Armed Services Committee hearing on Wednesday.

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Last week, US intelligence experts said technical analysis of another audio tape aired on the al-Jazeera satellite TV network showed "almost certainly" that it came from Bin Laden.

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In a meta-analysis of the research literature on alcohol taxes and their impact on consumption, Wagenaar et al. found that a 10 percent increase in alcohol prices would result in a 5 percent reduction in drinking.

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