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...Anassessment of ces and cobb douglas production functions eric miller e mail cbo gov congressional budget oce june workingpapersinthisseries are preliminary circulated to stimulate discussion critical comment these papers not subject s formal review editing processes the analysis conclusions expressed in them those authors should be interpreted as references publications cleared with author this series can obtained at www select then working i would like thank bob arnold juan contreras dennis matthew goldberg angelo mascaro delciana winders thomas woodward for helpful comments abstract thispapersurveystheempiricalandtheoreticalliteratureonmacroeconomicproduction assesses whether constant elasticity substitution or specication is more appropriate use macroeconomic forecasts thecobb major strengths its ease seemingly good empirical t across many data sets unfortunately still ts well cases where some fundamental assumptions violated suggests that tests picking up a statistical artifact ra...