4. The method of claim 1 , wherein the steps of determining a member-level demographic characteristic and determining a first demographic characteristic further comprise: assigning each member, of the first result-base, a value from a range of potential values; and summarizing the values assigned with a histogram.
4. The method of claim 1 , wherein the steps of determining a member-level demographic characteristic and determining a first demographic characteristic further comprise: assigning each member, of the first result-base, a value from a range of potential values; and summarizing the values assigned with a histogram. 8. The method of claim 4 , wherein the histogram is normalized.