12 pages., Online via UI e-subscription., The author compiled restaurant sales and unit count estimates for 155 restaurant chains during 1981 through 1998. Unit-level sales and advertising expenditures were calculated by averaging annual system-wide totals by the number of units in operation during the year. Findings supported hypotheses that national advertising does not provide a positive return to advertising for many chain units and a larger proportion of chains exhibit a positive return to advertising at the system level than at the unit level.