The problem associated with evaluating an econometric model using values outside those used in the model estimation is illustrated in the evaluations of a residential load management program during each of two successive years. The analysis reveals that unless attention is paid to this problem,...

In 1983 a major utility company conducted an experimental program that placed a portable electric heater into each of 140 households with central electric heat. A pretest-posttest control group design was used to determine whether the use of a single portable electric heater could significantly...