Racial Profiling

I updated my tool for explaining and exploring racial profiling in traffic policing recently. While we can only see the outcome of stops and ticketing, we can explore different scenarios for the true rates of violating traffic under different assumptions about fairness, efficiency, and effort of traffic policing. Hopefully the reasoning is easier to follow now. http://mirthbottle.github.io/rprofiling/

It Puts the Statistics in the Data Science

Data science is a trendy buzzword.

That doesn't mean I am not interested in it, though.

I'm reviewing my statistics by walking through this tutorial, which will soon be a book 'Statistics Done Wrong.'

I am finding it really helpful.  It highlights several common pitfalls of interpreting statistics.  The language is approachable and clear.

Yaaay!!!

Double Sums

I used this identity today.  It was sooo fun.  Now that I know it I can show they're equivalent, but I was kinda sad I couldn't think of it myself.

Nonlinear Dynamics in Economics

Found a book of essays on nonlinear dynamics in economics, finance, and the social sciences. Looks like most of the authors are European.

Math

The other day, some of my friends were talking about p-adic numbers.

I also learned about dihedral groups. Maybe I can try to explain what they are later.