Alvarez and Brehm argue that respondents deploy what they know about politics (often little) to think in terms of what they value and believe. Working with sophisticated statistical models, they offer a unique analysis of not just what a respondent is likely to choose, but also how variable those choices would be under differing circumstances. American public opinion can be characterized in one of three forms of variability, conclude the authors: ambivalence, equivocation, and uncertainty. Respondents are sometimes ambivalent, as in attitudes toward abortion or euthanasia. They are often equivocal, as in views about the scope of government. But most often, they are uncertain, sure of what they value, but unsure how to use those values in political choices.
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