通过使用风险模式判断，本文发现了有力的经验论据证明由黑人公民权利团体组成的激进主义从犹太人团体和劳工组织那里得到了立法支持的配合。

Using hazard model estimates, the paper finds strong empirical evidence that activism by black civil rights groups was complemented by legislative support from Jewish groups and from organized labor.

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