Heterogeneity

The Social Science Statistics Blog has an interesting entry today on heterogeneity in observational studies. Below is an excerpt: “Imagine you are asked to conduct an observational study to estimate the effect of wearing a helmet on the risk of death in...

High Octane Gasoline

Scientific American: Fact or Fiction?: Premium Gasoline Delivers Premium Benefits to Your CarExploding the myth that premium gasoline delivers better performance in the average...

Positional Goods

Economist discuss positional goods, which are goods that are in fixed supply. People can only enjoy these goods if others do not. Some examples include the best education, best jobs, and best home locations. Positional goods for previous generations have become...