pulling numbers alone is not sufficient. you have to

来源: quantnj 于 2012-10-19 13:56:16 [] [旧帖] [给我悄悄话] 阅读数 : (184 bytes)

look at it under the hood. for example, the break-down of age groups and the probability that they will actually go to vote. you also need some statistical model for projection.

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