Scott Alexander's April 2026 links roundup covers diverse topics including Venn diagram complexity, flag desecration laws, AI developments, political analysis, scientific studies, and various cultural curiosities. Longer summary

This monthly links post compiles interesting articles, studies, and observations from across the internet in April 2026. Major themes include AI progress and policy (including discussions of AI alignment, capabilities, and regulation), political developments (Trump administration actions, election analysis), scientific findings (from evolutionary psychology to medical treatments), and various cultural oddities. Scott provides brief commentary on each link while noting that he hasn't independently verified all claims and that commenters typically find errors in a few links per post. Shorter summary

Scott argues that California's proposed billionaire tax is actually an extortion scheme by SEIU, which has a history of proposing destructive ballot initiatives and withdrawing them in exchange for concessions. Longer summary

Scott argues that California's 2026 Billionaire Tax Act is not a genuine progressive wealth tax proposal, but rather an extortion scheme by the Service Employees International Union (SEIU). He explains the tax's various problems (including taxing unrealized gains and being retroactive), then reveals SEIU's history of proposing deliberately destructive ballot initiatives targeting healthcare industries, only to withdraw them in exchange for money and union expansion rights. The union has done this repeatedly with hospitals and dialysis clinics, spending millions on initiatives they never intended to pass. Scott suggests the billionaire tax follows the same pattern: SEIU is leveraging Governor Newsom's presidential ambitions and desire to keep tech billionaires happy, hoping he'll offer concessions to make the initiative disappear. Shorter summary

Scott Alexander discusses recent events in prediction markets, including a costly prank on Manifold, debt ceiling forecasts, a study on long-term predictions, and a high-profile hyperinflation bet. Longer summary

This post covers several topics in the world of prediction markets and forecasting. It begins with the story of a Manifold user who lost $29,000 in a prank market, leading to changes in Manifold's policies. It then discusses recent predictions about the US debt ceiling, a study on long-term forecasting accuracy, and a high-profile bet about hyperinflation between Balaji Srinivasan and James Medlock. The post ends with updates on other prediction markets, including ones about open-source AI and the ACX book review contest. Shorter summary

Scott Alexander shares 40 diverse and intriguing links and news items from September 2022, covering topics from AI advancements to political analysis and cultural observations. Longer summary

Scott Alexander presents a collection of 40 interesting links and news items from September 2022. The topics range from AI developments and their implications, to political analysis, scientific discoveries, and cultural observations. He covers subjects like image generation AI, conspiracy theories, the political situation in South Africa, nuclear power in California, and language models' capabilities. The post also includes personal anecdotes, book reviews, and interesting statistical findings. Shorter summary

Scott Alexander analyzes prediction markets for the Ukraine crisis, introduces Manifold Markets, and discusses recent Metaculus questions and forecasting initiatives. Longer summary

Scott Alexander discusses various prediction markets and forecasting platforms, focusing on the Ukraine crisis, a new prediction market called Manifold Markets, and recent questions on Metaculus. He analyzes the probabilities of a Russian invasion of Ukraine across different platforms, introduces the concept of an 'Alexander Cube' for ideal prediction markets, and highlights interesting markets on Manifold. The post also covers new Metaculus questions on intelligence enhancement and environmental issues, and mentions several forecasting-related contests and grants. Shorter summary