I produced a short video on measuring inequality, focusing on the construction of the Gini index, the trend in US family inequality, and an example of using it to measure world inequality. It’s 15 minutes, intended for intro-level sociology students.
I like teaching this not because so many of my students end up calculating and analyzing Gini indexes, but because it’s a readily interpretable example of the value of condensing a lot of numbers down to one useful one — which opens up the possibility of the kind of analysis we want to do (Going up? Going down? What about France? etc.). It also helps introduce the idea that social students of inequality are systematic and scientific, and fun for people who like math, too.
The video is below, or you can watch it (along with my other videos) on YouTube. The slides are available here, including one I left out of the video, briefly discussing Corrado Gini and his bad (fascist, eugenicist) politics. Comments welcome.