Posts Tagged ‘ lurking variables ’

Example 9.20: visualizing Simpson’s paradox

February 7, 2012
By
Example 9.20: visualizing Simpson’s paradox

Simpson's paradox is always amazing to explain to students. What's bad for one group, and bad for another group is good for everyone, if you just collapse over the grouping variable. Unlike many mathematical paradoxes, this arises in a number of real...

Read more »

Example 7.34: Propensity scores and causal inference from observational studies

April 26, 2010
By
Example 7.34: Propensity scores and causal inference from observational studies

Propensity scores can be used to help make causal interpretation of observational data more plausible, by adjusting for other factors that may responsible for differences between groups. Heuristically, we estimate the probability of exposure, rather t...

Read more »