Scott reviews the state of prediction markets after explosive growth, finding that most volume is degenerate sports gambling rather than useful forecasting, and proposes both technical solutions and two potential futures for the field. Longer summary

Scott Alexander examines the current state of prediction markets after their recent explosion in popularity, noting that while volume has grown from millions to billions per month, most of it comes from sports betting rather than the epistemic improvement he'd hoped for. He explores several problems: markets aren't asking the most important questions society needs answered; resolution criteria disputes ("rulescucking") create controversy; and there are concerns about insider trading and manipulation. He proposes solutions including a novel approach to conditional markets and suggests two paths forward: either creating user-generated, subjectively-resolved real-money markets (the "Siskind Cube"), or accepting that prediction markets' main value may be as training data for AI forecasters that could make the markets themselves obsolete by late 2026. Shorter summary

Scott examines why young people feel economically hopeless despite economists saying things are fine, testing various explanations like housing costs and wages, and concluding the truth involves both real factors (harder competition, expensive cities, recent mortgage spikes) and media-driven negativity. Longer summary

Scott Alexander investigates the 'vibecession' - the paradox where economic indicators show improvement but consumer sentiment is terrible, particularly among young people who feel permanently locked out of opportunity. He systematically examines various proposed explanations including declining wages, housing costs, inflation miscalculation, inequality, and debt, finding that none fully explain the phenomenon. His analysis suggests the crisis may be partly real (increased effort required for same outcomes, concentration of jobs in expensive cities, recent mortgage increases) but also partly driven by increasingly negative media coverage and changing consumption patterns toward more conspiratorial sources. Shorter summary

Scott shares his monthly collection of 56 interesting links and developments from July 2025, covering AI, politics, science, and culture, with brief commentary on each. Longer summary

This is a collection of 56 interesting links and news items from July 2025, covering topics from AI development to politics to scientific research. The post includes updates on OpenAI's status, developments in AI regulation, new medical treatments, cultural trends, and various scientific findings. Scott maintains his usual style of presenting these with brief commentary and occasional humor, while being careful to note that he hasn't independently verified all links. Some notable items include Trump's "Big Beautiful Bill", new AI safety developments, trends in social media usage, and various medical breakthroughs. Shorter summary

Scott Alexander responds to Tyler Cowen about USAID funding, correcting his own previous claims about overhead costs while maintaining that Cowen's criticism of USAID was misleading and potentially harmful. Longer summary

Scott Alexander responds to Tyler Cowen's criticism of his previous post about USAID funding. He addresses several points: whether Cowen endorsed Rubio's claims about USAID waste, the true nature of overhead costs in USAID-funded organizations, and the broader debate about foreign aid effectiveness. Scott shows that actual administrative overhead in major USAID partners like Catholic Relief Services is much lower than previously thought (around 6-7% rather than 30%), admits his mistake on this point, but maintains his criticism of Cowen's original post as misleading. He argues that USAID's work is predominantly focused on essential humanitarian aid rather than wasteful programs. Shorter summary

Scott Alexander and 1DaySooner outline potential positive health policy initiatives that could emerge under three key Trump administration health appointees: Jim O'Neill, Marty Makary, and Jay Bhattacharya. Longer summary

This post discusses potential health policy proposals under a hypothetical second Trump administration, focusing on three key appointees and their possible initiatives. The piece examines Jim O'Neill as Deputy Secretary of HHS, highlighting his potential work on organ donation compensation and longevity research; Marty Makary as FDA Commissioner, discussing FDA transparency and regulatory improvements; and Jay Bhattacharya as NIH Director, exploring research funding reforms and challenge trials. Written in collaboration with 1DaySooner, the post specifically focuses on optimistic scenarios that could emerge from these appointments. Shorter summary

Scott shares 55 interesting links covering topics from AI poetry to religious movements, including updates on various projects, unusual historical events, and current developments in technology, politics, and society. Longer summary

This is Scott's monthly links post for December 2024, collecting various interesting stories and developments. The links cover a wide range of topics, from Steven Seagal's bizarre life trajectory to developments in AI and technology, including updates on previous ACX topics and grants. Many links relate to ongoing discussions in the rationalist and EA communities, including debates about effective altruism and charitable giving. The post also includes various curiosities from history, culture, and current events, with Scott often providing his own analysis or perspective on the items shared. Shorter summary

Scott examines a new AI forecaster, discusses Polymarket's success, and reviews recent developments in prediction markets and forecasting. Longer summary

This post discusses recent developments in AI forecasting and prediction markets. It starts by examining FiveThirtyNine, a new AI forecaster claiming to be superintelligent, but finds its performance questionable. The post then briefly mentions r/MarkMyWords, a subreddit for bold predictions. It goes on to discuss Polymarket's recent success, particularly in betting on the 2024 US presidential election. The post concludes with a roundup of interesting prediction markets and forecasting-related news, including political betting controversies in the UK and updates on the Kalshi vs. CFTC legal battle. Shorter summary

The review examines 'Lying for Money' by Dan Davies, which explores various types of financial fraud and their economic implications, discussing main themes and types of white-collar crime. Longer summary

This book review explores 'Lying for Money' by Dan Davies, which examines various types of financial fraud and their implications for the broader economy. The review covers the book's main themes, including the idea that fraud is an equilibrium phenomenon, the importance of trust networks in facilitating fraud, and how complex systems are more vulnerable to exploitation. It discusses the four types of white-collar crime outlined in the book: long firm fraud, counterfeiting, control fraud, and market crimes. The review also highlights the book's insights on how frauds tend to grow over time and the challenges in preventing and prosecuting financial crimes. The reviewer adds their own analysis, particularly on the recent FTX cryptocurrency scandal, which is not covered in the book but fits well with its themes. Shorter summary

Scott Alexander investigates the reliability of dietary supplements, finding that while issues exist, most are not completely fake as some media reports claim. Longer summary

Scott Alexander examines the trustworthiness of dietary supplements, debunking widespread claims that most are completely fake. He analyzes studies, consumer lab reports, and industry insider accounts to conclude that while there are issues in the supplement industry, outright fraud is rare, especially for common vitamins and minerals. More complex botanicals and trendy supplements may have more variability, but complete absence of active ingredients is uncommon. Scott suggests consumers should be discerning, especially with lesser-known products, but notes that for many supplements, precise dosing may not be critical. Shorter summary

Scott Alexander shares a diverse collection of links on topics ranging from scientific studies to cultural phenomena, with brief commentary on each. Longer summary

This post is a collection of links to various interesting articles, studies, and topics. Scott covers a wide range of subjects including scientific studies, cultural phenomena, economic trends, AI developments, and current events. The post includes commentary on each link, often with Scott's personal insights or opinions. Some recurring themes include AI progress, social science research, economic inequality, and cultural shifts. The tone is informative and slightly humorous, with Scott occasionally adding caveats about the reliability of certain claims or studies. Shorter summary

Scott examines the recent crackdown on Polymarket, critiques US policy on prediction markets, and discusses the future and potential of both prediction markets and cryptocurrency. Longer summary

Scott Alexander discusses the recent $1.4 million fine imposed on Polymarket by the CFTC and its implications for prediction markets. He critiques the US government's approach to prediction markets, arguing it hinders better decision-making. The post explores the potential of prediction markets, what's needed for their success, and the challenges they face. It also touches on the broader implications for cryptocurrency and its original vision of creating censorship-resistant financial products. Shorter summary

The post examines whether unimproved land value can be accurately assessed separately from buildings, a crucial aspect of Georgist land value taxation. Longer summary

This post explores the feasibility of accurately assessing unimproved land value separately from buildings, a key requirement for implementing Georgist land value taxation. It reviews various modern assessment methods, discusses their accuracy and limitations, and concludes that while not perfect, these methods are likely 'good enough' for practical implementation of land value tax policies. Shorter summary

Lars Doucet presents evidence that land is still a major economic factor in modern times, contrary to some economists' claims. Longer summary

This post, written by Lars Doucet, is the first in a series examining the empirical basis for Georgism. It focuses on whether land is still a significant economic factor in modern times, as some economists argue it isn't. Doucet presents evidence that land is indeed a major economic factor, showing that it represents a large portion of urban real estate value, bank loans, personal assets, and government revenue potential. He also demonstrates that land ownership is highly concentrated among the wealthy, contributing to economic inequality. The post concludes that land is a 'really big deal' in modern economies, contrary to some economists' claims. Shorter summary

Scott Alexander examines recent developments in model cities, including political threats to ZEDEs in Honduras, El Salvador's Bitcoin city plan, and the mysterious Praxis project. Longer summary

This blog post discusses recent developments in model cities and charter cities. It covers the political situation in Honduras affecting ZEDEs, El Salvador's plan for a Bitcoin-themed city, the mysterious Praxis project, and other model city news. The post critically examines each project, analyzing their feasibility, potential impact, and the motivations behind them. Scott Alexander provides context, expresses skepticism where appropriate, and offers insights into the challenges and opportunities these projects face. Shorter summary

Scott Alexander explores various applications and recent developments in prediction markets and forecasting, covering topics from election betting to teacher evaluation and social media moderation. Longer summary

Scott Alexander discusses several topics related to prediction markets and forecasting. He starts with the concept of a Keynesian beauty contest applied to long-term forecasting, then analyzes recent developments in PredictIt markets, particularly the Virginia gubernatorial election. He explores the idea of using prediction markets to evaluate teacher performance, and examines some recent Metaculus predictions on SpaceX valuation, college enrollment, and AI code assistance adoption. The post also covers Vitalik Buterin's proposal for using prediction markets in social media moderation, and concludes with various links to prediction market-related news and articles. Shorter summary

Scott Alexander examines whether psychiatric conditions result from evolutionary failures or tradeoffs, proposing that most disorders involve a combination of both. Longer summary

Scott Alexander explores the nature of psychiatric conditions, discussing whether they result from evolutionary failures or tradeoffs. He presents evidence for both hypotheses, noting that recent research favors the failure hypothesis. However, he argues that some conditions likely involve both failures and tradeoffs. He uses analogies from justice systems and nuclear war scenarios to illustrate how failures and tradeoffs can interact. The post concludes by suggesting that most psychiatric disorders exist on a spectrum from mostly-tradeoff to mostly-failure, and critiques the neurodiversity movement's blanket statements about conditions like autism. Shorter summary

Scott Alexander's links post covers historical oddities, scientific studies, social issues, and tech developments, ranging from pet monkeys to AI progress. Longer summary

This links post covers a wide range of topics, including historical curiosities, scientific studies, social issues, and technology developments. Some notable items include: a discussion of ways things have improved since the 1980s, an analysis of Alcoholics Anonymous effectiveness, insights into national IQ correlations with development, and updates on COVID-19 responses. The post also touches on topics like depression treatment, artificial intelligence progress, and healthcare system comparisons. Shorter summary

Scott Alexander discusses various aspects of the COVID-19 pandemic, including strategies, mysteries, controversies, and global impacts. Longer summary

This blog post discusses various aspects of the COVID-19 pandemic, including the 'hammer and dance' strategy, smoking cessation, mysteries surrounding Japan's low case numbers, takeout food safety, ventilator numbers, the UK's policy reversal, density and infection rates, hydroxychloroquine controversy, concerns about developing countries, donation opportunities, cost-benefit analysis of lockdowns, US stimulus bill negotiations, and media coverage of the pandemic across the political spectrum. The post also includes short links to other coronavirus-related news and developments. Shorter summary

Scott Alexander provides updates and speculations on various aspects of the COVID-19 pandemic, including case estimates, strategies, medical issues, and societal responses. Longer summary

This blog post provides updates and speculations on various aspects of the COVID-19 pandemic. It covers topics such as estimating the true number of cases, the lack of a clear endgame strategy, the effectiveness of 'flattening the curve', differentiating COVID-19 from flu symptoms, the use of anti-inflammatory drugs, ventilator shortages, disease seasonality, the need for better data, and the Bay Area's response to the crisis. The post also includes short links to other coronavirus-related news and observations. Shorter summary

A diverse collection of links on topics ranging from gerrymandering and health insurance to tech bubbles and extinction risk estimates, presented with minimal commentary. Longer summary

This post is a collection of various interesting links and news items. It covers a wide range of topics including gerrymandering, health insurance effects, corporate profits, drug pricing, media bias, ketamine research, tech bubbles, seasonal effects on mental health, FDA drug importation plans, research on sex differences, carbon capture technologies, birth order effects, waist-to-hip ratio preferences, extinction risk estimates, life sciences research, Google algorithm changes affecting health sites, online economy intricacies, fluoride effects on IQ, and many other diverse subjects. The post presents these items without much commentary, leaving readers to explore further on their own. Shorter summary

Scott Alexander responds to comments on billionaire philanthropy, addressing criticisms while ultimately defending its net positive impact and arguing to protect the most effective charitable efforts. Longer summary

Scott Alexander responds to comments on his previous post about billionaire philanthropy. He addresses criticisms and counterarguments, providing further analysis on topics like the scale of billionaire donations compared to political spending, the democratic nature of philanthropy, tax deductibility, and potential downsides. While acknowledging some valid concerns, Scott ultimately defends the net positive impact of billionaire philanthropy, especially highlighting examples like the Gates Foundation's global health work. He argues that even if some billionaire philanthropy is problematic, the most effective charitable efforts are so valuable that they should be protected and encouraged. Shorter summary

Scott Alexander argues against criticism of billionaire philanthropy, citing its efficiency, positive impact, and ability to support important causes that governments often neglect. Longer summary

Scott Alexander argues against criticizing billionaire philanthropy, presenting several points: 1) Criticizing philanthropy more than luxury spending incentivizes the wrong behavior. 2) The potential good done by philanthropy outweighs concerns about inequality. 3) Billionaire donations often receive more scrutiny than praise. 4) Government spending is often less efficient and focused on important causes than private philanthropy. 5) Philanthropy can support pluralism and fund important work the government won't. 6) Centralized government control risks a single point of failure. He concludes that the immense good done by philanthropic efforts, such as saving millions of lives, outweighs concerns about democratic accountability or inequality. Shorter summary

A diverse collection of links covering recent studies, unusual historical events, technological developments, and various curiosities across multiple fields. Longer summary

This post is a collection of various links and news items on diverse topics. It covers studies on pornography's effects, unusual military proposals, charter schools' success, climate change predictions, animal rights, restorative justice in schools, parenting advice, sexual selection theory, AI-generated content, breastfeeding patterns, visualization of classical music, Soviet whaling, cancel culture, housing legislation, embryo screening, retractions of scientific studies, gene drives, drug pricing, UFO sightings, cryopreservation, air conditioning efficiency, genetic testing for medication response, social justice terminology trends, napping benefits, nootropics survey results, Bitcoin price surge, transformer architecture in machine learning, fact-checking errors in popular books, challenges to persistence research, fringe ideologies in Japan, AI progress on language understanding, climate change risks, and various other curiosities and scientific findings. Shorter summary

Scott Alexander reviews a book attributing rising service costs to the Baumol effect, finding it convincing but raising some concerns about conflicting data and affordability issues. Longer summary

Scott Alexander reviews the book 'Why Are The Prices So D*mn High?' by economists Alex Tabarrok and Eric Helland, which attributes rising costs in services like healthcare and education to the Baumol effect. The authors argue that as productivity increases in some sectors, wages rise across all sectors, making labor-intensive services relatively more expensive. Scott finds their case convincing but raises some concerns, including data on stagnant real wages, conflicting information on professional salaries, and the apparent decrease in affordability of services like education, which the Baumol effect shouldn't cause. He seeks further clarification on these points to fully accept the Baumol effect as the primary explanation for cost disease. Shorter summary

Scott Alexander explains why the controversial Culture War thread was removed from r/slatestarcodex due to harassment, and discusses the challenges of hosting spaces for difficult conversations online. Longer summary

Scott Alexander explains why the Culture War thread on the r/slatestarcodex subreddit was shut down and moved to a new subreddit. He describes how the thread became a unique space for civil discussion of controversial topics, but also attracted harassment and threats against Scott personally. This led to a nervous breakdown and the decision to separate the thread from his blog. Scott uses this story to illustrate broader issues around hosting spaces for difficult conversations online, and the climate of fear and censorship that can result from harassment campaigns. Shorter summary