Advantages of Panel Data:
a. Such data enable the researcher to undertake detailed analysis. For example one can determine the characteristics of individuals who have changed brands and those who have not. This may help the firm identifying the segment of the population on which promotional effort should be focused.
b. More comprehensive data could be obtained individuals so families included in the panel are those who have accepted to provide data periodically. As panel members are wiling persons more data can be collected.
c. Panel data have been found to be more accurate than data collected through surveys.
d. Costs of data collection through panels are generally lower than through personal interviews. A large proportion of the costs of the panel is fixed cost such as expenditure incurred on the recruitment training and maintaining of panel members while the variable cost of collecting data from them may be moderate particularly as the response rate will be extremely high.