Through the generosity of funds provided by a State RAship, we were also able to study Wisconsin Cities as well as rural areas. One of the interesting things we found was variation in how young adults distributed themselves across the five-year cohorts: 20-24, 25-29, 30-34, and 35-39. Generally, younger cohorts concentrated more in the center of cities, and older cohorts dispersed more. It is important to understand here, however, that these are not maps of the same group aging over time, but the placement of different age groups at the same point in time.
Below are links to the maps that show shaded concentrations of each cohort by census tract. The shadings show standard deviations. A standard deviation measures how far any specific item is away from the average of all the items. If, for example, you arranged everyone by height, then those whose height was closest to the average would be fewer standard deviations away. The tallest and shortest people would be the most standard deviations away. In our case, the census tracts with concentrations of the specific age group that are highest compared to the mean concentration are the most standard deviations away. Thanks to Todd Flournoy for taking the lead on this analysis.