Category: experiment

Causal Random Forests, by Mark White

Causal Random Forests, by Mark White

I stumbled accros this incredibly interesting read by Mark White, who discusses the (academic) theory behind, inner workings, and example (R) applications of causal random forests: EXPLICITLY OPTIMIZING ON CAUSAL EFFECTS VIA THE CAUSAL RANDOM FOREST: A PRACTICAL INTRODUCTION AND TUTORIAL (By Mark White) These so-called "honest" forests seem a great technique to identify opportunities … Continue reading Causal Random Forests, by Mark White

Two Tinder Experiments: An Unequal Economy

Two Tinder Experiments: An Unequal Economy

I've seen a fair share of Tinder experiments come by, for instance, someone A/B-testing attractiveness with and without facial hair, but these new two posts on Medium are the best I've come across so far. In his first experiment, this self-proclaimed worst online dater went catfishing. He made a Tinder account using stock photos of … Continue reading Two Tinder Experiments: An Unequal Economy

Helpful resources for A/B testing

Helpful resources for A/B testing

Brandon Rohrer -- (former) data scientist at Microsoft, iRobot, and Facebook -- asked his network on Twitter and LinkedIn to share their favorite resources on A/B testing. It produced a nice list, which I summarized below. https://twitter.com/_brohrer_/status/1147602524079382531 The order is somewhat arbitrary, and somewhat based on my personal appreciation of the resources. Course: A/B-testing by … Continue reading Helpful resources for A/B testing

Propensity Score Matching Explained Visually

Propensity Score Matching Explained Visually

Propensity score matching (wiki) is a statistical matching technique that attempts to estimate the effect of a treatment (e.g., intervention) by accounting for the factors that predict whether an individual would be eligble for receiving the treatment. The wikipedia page provides a good example setting: Say we are interested in the effects of smoking on … Continue reading Propensity Score Matching Explained Visually

How to find two identical Skittles packs?

How to find two identical Skittles packs?

In a hilarious experiment the anonymous mathematician behind the website Possibly Wrong estimated that s/he only needed to open "about 400-500" packs of Skittles to find an identifical pack. From January 12th up to April 6th, s/he put it to the test and counted the contents of an astonishing 468 packs, containing over 27.000 individual … Continue reading How to find two identical Skittles packs?

A/B Testing a New Look

A/B Testing a New Look

This WordPress blogger I came across -- let's call him "John" for now -- has a very peculiar way of testing out his looks. Using dating-apps like Tinder, John¬†conducted A/B-tests to find out whether people would prefer him romantically with or without a beard.¬† John with beard (via https://appsciencing.wordpress.com/)John shaven (via https://appsciencing.wordpress.com/) Via a proper … Continue reading A/B Testing a New Look