In this paper the author tries to identify various influences on the coefficient of determination (R2) which originate in the research designs of empirical studies, rather than in the research subjects within the framework of an exploratory meta-analysis. The following results are obtained: the larger the sample size and the smaller the number of regressors in a study, the smaller is R2; time-series studies achieve higher values for R2 than cross-sectional studies; studies with secondary data achieve higher values for R2 than studies with primary data; publications in the Journal of Marketing Research show on average lower values for R2 than publications in the International Journal of Research in Marketing and in Marketing Letters.
Reisinger, H (1997), "The impact of research designs on R2 in linear regression models: an exploratory meta-analysis", Journal of Empirical Generalisations in Marketing Science, Vol. 2, No. 1
Coefficient of Determination, Linear Regression Model, Marketing Research