I used math models to explore how matrix changes in Powerball will likely increase sales (as we all want) and increase year-to-year variability (as nobody wants), and estimated the likelihood of a Powerball jackpot exceeding $1 billion in 2016 at about 17%. A few weeks after this publication appeared, that event did happen. As I remarked to some at the time, same odds as Russian Roulette (just saying). NASPL Insights December 2015