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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

Learn more about the history of ERIC here. PDF icon

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Goldhaber, Dan; Lavery, Lesley; Theobald, Roddy; D'Entremont, Dylan; Fang, Yangru – Center for Education Data & Research, 2012
Recent research (Strunk and Reardon forthcoming) applies Partial Independence Item Response (PIIR) models to teacher bargaining agreements in California to calculate the latent restrictiveness of these contracts. Further research (Strunk and Grissom 2010; Strunk forthcoming) tests the external validity of these estimates. Given that much research…
Descriptors: Profiles, Unions, Collective Bargaining, Inferences