Oden (1995) adapted Moran's I to consider population size in the study region, developing a new statistic, Ipop. Ipop is used to detect departures from spatial randomness, but, unlike Moran's I, it accounts for differences in population size across areas. If ignored, large differences in population size decrease the ability of Moran's I to detect clustering/departures from spatial randomness.
Like Moran's I, Oden's Ipop explores the global spatial pattern of group-level data.
