The Causal Roundup explores advancements in causality and product decision-making, with a focus on experimentation culture and infrastructure. Booking.com emphasizes quality over quantity in decision-making by using a three-point rubric for assessing experiment design, execution, and shipping. Airbnb addresses data consistency issues by developing Minerva, a unified metrics platform, and Zipline, a feature store, to enhance data management. The newsletter also discusses a study on HEPA filters' efficacy in filtering SARS-CoV-2 and highlights the Nobel prize in economics awarded for contributions to causal analysis using natural experiments. LinkedIn's Intellige system provides insights into machine learning predictions, while Teads and Netflix share their approaches to A/B testing and statistical significance. The roundup encourages engagement with experimentation to improve product decisions, sharing tools and processes for success.