  We demonstrate the effectiveness of democratization and efficient computation
as key concepts of our experimentation platform (XP) by presenting four new
models supported by the platform: 1) Weighted least squares, 2) Quantile
bootstrapping, 3) Bayesian shrinkage, and 4) Dynamic treatment effects. Each
model is motivated by a specific business problem but is generalizable and
extensible. The modular structure of our platform allows independent innovation
on statistical and computational methods. In practice, a technical symbiosis is
created where increasingly advanced user contributions inspire innovations to
the software that in turn enable further methodological improvements. This
cycle adds further value to how the XP contributes to business solutions.
