Leadership Power Indices

A generation’s power index is a measure of its lifetime tenure in office. It is the sum of all of its leadership shares across all years, divided by its number of birth years. Starting with the Compromise Generation, the “national” leadership share is the unweighted average of the shares in these three bodies.

Since this value for all cohorts averages to 100, we can say that a generation’s index measures the political power of its cohorts relative to all cohorts of all generations. For example, the Gilded Generation’s value of 120.9 shows that its cohorts, on average, occupied political office for 20.9 percent more aggregate years than the average for all cohorts of all generations.