ERIC Number: EJ307831
Record Type: Journal
Publication Date: 1984
Reference Count: N/A
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
Authoring Institution: N/A