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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.

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Peer reviewed Peer reviewed
ERIC Number: EJ307831
Record Type: CIJE
Publication Date: 1984
Pages: N/A
Abstractor: N/A
Reference Count: 0
The Excluded Variable Problem in Nonrandomized Control Group Designs.
Dwyer, James H.
Evaluation Review, v8 n4 p559-72 Aug 1984
A solution to the problem of specification error due to excluded variables in statistical models of treatment effects in nonrandomized (nonequivalent) control group designs is presented. It involves longitudinal observation with at least two pretests. A maximum likelihood estimation program such as LISREL may provide reasonable estimates of treatment effects. (Author/BS)
Publication Type: Journal Articles; Opinion Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Evaluation Problems; LISREL Computer Program