It is common practice to demand that studies include a large sample size with individuals randomized to different treatment groups. Quite a lot it appears. This article describes the author's experiences in manipulating diet and activity to discern the effect on sleep, mood, and weight. Though the conclusions from the experiments don't necessarily apply to the population at large, the author shows that self-experimentation is a useful approach for generating and evaluating hypotheses.
Racial discrimination can take a variety of forms.
In this case the allegation was that an apartment complex rental office was disproportionately steering minority tenants to part of the apartment complex. You may remember the story of three sisters giving birth on the same day several years ago. If not, you probably know a story about a similar coincidence. In this short article, the author talks about the difficulty of assigning probabilities to these unlikely events. The article closes with an invitation for readers to provide their own answers.