What explains someone’s opinion on the state of military spending? Like many social science questions, this can be particularly challenging to model, since it is highly subjective to variety across individuals. 2,368 more words

## Tags » Random Effects

#### A Return to Polar Urals: Wilson et al 2016

Wilson et al 2016, like D’Arrigo et al 2006, includes a ‘Polar Urals’ chronology as one of its components. Tree ring chronologies from Polar Urals and Yamal have long been a contentious issue at Climate Audit, dating back to the earliest days (see tags… 3,687 more words

#### Estimating Fixed and Random Effects in R

A short primer on fixed and random effects estimators in R with four examples from Wooldridge (2013).

#### Laplace approximation in Python: another cool trick with PyMC3

I admit that I’ve been skeptical of the complete rewrite of PyMC that underlies version 3. It seemed to me motivated by an interest in using unproven new step methods that require knowing the derivative of the posterior distribution. 66 more words