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30 posts found
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Mar 01, 2026
acx
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27 min 4,148 words 435 comments 427 likes podcast (20 min)
Scott analyzes the legal controversy around AI companies contracting with the Department of War, showing that 'all lawful use' permits mass surveillance and autonomous weapons through existing legal loopholes, despite OpenAI's claims of safeguards. Longer summary
Scott Alexander analyzes the controversy around AI companies' contracts with the Department of War, focusing on Secretary of War Pete Hegseth's designation of Anthropic as a 'supply chain risk' after they refused to allow their AI to be used for mass surveillance and autonomous weapons. The post examines OpenAI's subsequent agreement with the DoW, which permits 'all lawful use' of their models. Through detailed legal analysis provided by anonymous readers, Scott shows that current laws have significant loopholes: mass domestic surveillance is technically legal when data is 'incidentally obtained' or purchased from third parties, and autonomous weapons are only regulated by vague DoW policies that can be changed at will. The post critiques OpenAI's FAQ as misleading, arguing their safeguards are inadequate, and concludes with questions that employees, journalists, and lawmakers should be asking about the contract. Shorter summary
Dec 04, 2025
acx
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39 min 6,036 words 1,095 comments 727 likes podcast (43 min)
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
Oct 01, 2025
acx
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213 min 32,949 words 755 comments 679 likes podcast (186 min)
A detailed investigation of the Sun Miracle of Fatima in 1917, where 70,000 people witnessed the sun appear to spin, change colors, and fall to earth, analyzing witness testimonies, skeptical explanations, and similar phenomena at other Marian apparition sites. Longer summary
Scott conducts an extensive investigation into the 1917 Miracle of the Sun at Fatima, where tens of thousands witnessed what appeared to be the sun spinning, changing colors, and falling to earth. He examines approximately 60 primary testimonies, evaluates common skeptical explanations (optical phenomena, weather events, mass hallucination), and documents similar sun miracles at other Marian apparition sites worldwide. Scott then critiques Dalleur's theory about distant witnesses and shadow analysis, explores why more people don't see these phenomena normally, and proposes a tentative materialist explanation involving a rare optical illusion modulated by cloud cover and social priming. The post ends by suggesting research directions for those interested in further investigation. Shorter summary
Jun 26, 2025
acx
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68 min 10,478 words 674 comments 383 likes podcast (62 min)
Scott explores the 'missing heritability' problem in genetics, where twin studies show traits like IQ and educational attainment are highly heritable but newer genomic methods find much lower heritability, analyzing various potential explanations for this discrepancy. Longer summary
The post examines the 'missing heritability' problem in genetics, where twin studies consistently show behavioral traits like IQ and educational attainment are substantially heritable (around 40-60%), while newer genomic methods find much lower heritability (around 15-20%). Scott reviews the history of behavioral genetics research, explains various study methodologies and their potential biases, and analyzes different hypotheses for this discrepancy. He examines whether twin studies might be flawed, whether newer methods might be missing important genetic effects, and whether educational attainment might be an unusually problematic trait to study. While acknowledging remaining mysteries, he tentatively concludes that twin studies are probably largely correct and that newer methods may be missing rare variants and genetic interactions. Shorter summary
Mar 13, 2025
acx
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28 min 4,272 words 313 comments 230 likes podcast (26 min)
Scott provides a detailed analysis of OpenAI's attempt to convert from nonprofit to for-profit status, including the legal challenges, competing offers, and implications for AI development. Longer summary
The post explains the complex situation around OpenAI's attempt to convert from a nonprofit to a for-profit structure. Scott details the history of OpenAI as a nonprofit, why they want to change, and the various legal and financial challenges they face. The post covers Sam Altman's proposed buyout plan, Elon Musk's competing offer and lawsuit, and the role of state Attorneys General in approving any conversion. The post also explains the implications for AI development and safety, and contrasts OpenAI's structure with Anthropic's different approach to balancing profit with beneficial AI development. Shorter summary
Jan 01, 2025
acx
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34 min 5,141 words 224 comments 423 likes podcast (30 min)
Scott examines the likelihood and potential severity of an H5N1 bird flu pandemic, analyzing prediction markets and historical data to estimate a 5% chance of pandemic in the next year with most likely moderate severity. Longer summary
Scott Alexander provides a comprehensive overview of H5N1 bird flu and its pandemic potential. He starts by explaining what flu is and its history of pandemics, then focuses on H5N1's current situation, analyzing prediction market estimates for its chances of causing a pandemic. The post examines different mortality scenarios and their likelihood, using data from past flu pandemics and current cases. It concludes with specific predictions about H5N1's future impact, suggesting a 5% chance of human pandemic in the next year, with varying degrees of severity if it occurs. Shorter summary
Nov 27, 2024
acx
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97 min 14,979 words 917 comments 506 likes podcast (88 min)
Scott analyzes research on whether longer prison sentences reduce crime, examining studies on deterrence, incapacitation, and aftereffects, to conclude that while prison does decrease crime through incapacitation, it's less cost-effective than other methods like policing. Longer summary
This post examines the relationship between prison sentences and crime reduction through three mechanisms: deterrence (scaring potential criminals), incapacitation (preventing prisoners from committing crimes), and aftereffects (post-release behavior changes). Through analysis of multiple studies and reviews, Scott finds that deterrence effects are minimal, incapacitation has strong positive effects (preventing about 7 crimes per prisoner-year), and aftereffects range from slightly beneficial to harmful depending on circumstances. He concludes that while prison does reduce crime, with a 10% increase in incarceration reducing crime by about 3%, it's less cost-effective than alternatives like increased policing. The post ends by examining practical challenges in the justice system that prevent effective handling of repeat offenders. Shorter summary
Feb 17, 2023
acx
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31 min 4,739 words 225 comments 156 likes podcast (27 min)
Scott Alexander reviews the evidence for declining sperm counts, discussing major studies, criticisms, and potential causes, while remaining uncertain about the true extent and reasons for any decline. Longer summary
Scott Alexander examines the evidence for declining sperm counts worldwide, discussing the major studies, potential causes, and criticisms of the hypothesis. He explores the methodology of sperm count studies, regional variations, possible explanations like plastics and pesticides, and animal data. While acknowledging the noisy data and potential confounders, he concludes that there's suggestive evidence for a decline but remains uncertain about its magnitude and causes. Shorter summary
Apr 13, 2022
acx
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80 min 12,326 words 201 comments 102 likes podcast (91 min)
Scott Alexander examines obscure pregnancy interventions that may improve child outcomes, rating them by evidence quality and potential impact. Longer summary
Scott Alexander reviews various obscure pregnancy interventions that could potentially improve child outcomes, particularly IQ. He rates them in tiers based on evidence strength and potential impact, with Tier 1 being most strongly supported. Key interventions discussed include embryo selection, choline supplementation, avoiding stress and certain substances, and optimizing birth timing. He emphasizes these are extreme measures not meant to induce guilt, and that standard pregnancy advice is still most important. Shorter summary
Nov 17, 2021
acx
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109 min 16,786 words 2,113 comments 442 likes podcast (128 min)
Scott Alexander analyzes ivermectin studies for COVID-19, finding most positive results likely due to methodological flaws, fraud, or confounding by parasitic infections. Longer summary
Scott Alexander provides an in-depth analysis of ivermectin studies for COVID-19 treatment, examining methodological issues, potential fraud, and confounding factors. He concludes that ivermectin likely doesn't significantly reduce COVID mortality except potentially in areas with high parasitic worm infections. The post explores broader issues around scientific credibility, fraud detection, and public trust in science. Shorter summary
Sep 02, 2021
acx
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50 min 7,628 words 260 comments 100 likes podcast (56 min)
Scott Alexander examines the current research on Long COVID, analyzing its prevalence, symptoms, and potential impacts to assess personal risk and societal implications. Longer summary
Scott Alexander reviews the current research on Long COVID, examining its prevalence, symptoms, duration, and impact on different groups. He explores various studies, discusses potential mechanisms, and evaluates the psychosomatic argument. The post concludes with an assessment of personal risk and comparisons to other post-viral syndromes, emphasizing the uncertainties still surrounding Long COVID. Shorter summary
Jul 07, 2021
acx
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73 min 11,254 words 491 comments 107 likes podcast (87 min)
Scott examines data on COVID-19 lockdown effectiveness, finding they likely reduced transmission but at significant costs, with targeted measures being most effective. Longer summary
Scott analyzes the effectiveness of COVID-19 lockdowns, examining data from Sweden, US states, and Europe. He finds that lockdowns likely reduced transmission rates, with targeted measures like school closures being more effective than stay-at-home orders. The analysis suggests lockdowns saved lives but at significant economic and emotional costs, with the cost-effectiveness varying between countries and time periods. Scott concludes that fast, well-targeted lockdowns may have been optimal, but emphasizes the high uncertainty in these estimates. Shorter summary
May 27, 2021
acx
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1 min 21 words 265 comments 45 likes
Scott Alexander directs readers to his essay on Works in Progress examining why suicide rates didn't increase during the COVID-19 pandemic as expected. Longer summary
Scott Alexander refers readers to his essay published on Works in Progress, which discusses the unexpected trend of suicides during the COVID-19 pandemic. The essay, titled 'Why didn't suicides rise during Covid?', likely explores the counterintuitive finding that suicide rates did not increase as many had predicted during the global health crisis. While the post itself doesn't provide details, it suggests an in-depth analysis of suicide statistics, mental health trends, and potential explanations for this phenomenon during the pandemic. Shorter summary
Mar 23, 2020
ssc
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32 min 4,933 words 262 comments podcast (34 min)
Scott Alexander reviews evidence on face mask effectiveness against coronavirus, concluding they likely offer some protection despite CDC recommendations against general public use. Longer summary
This post examines the effectiveness of face masks in preventing coronavirus transmission. It reviews theoretical reasons, case-control studies, randomized trials, and laboratory studies on surgical masks and N95 respirators. The author concludes that while not perfect, surgical masks likely offer some protection against infection in high-risk situations. The post also discusses the CDC's recommendations against mask use for the general public, suggesting this may be due to high standards of proof in medical communication rather than intentional deception. The author ultimately recommends considering mask use in high-risk situations if supplies are not limited, while emphasizing that masks are not a substitute for avoiding such situations when possible. Shorter summary
Nov 13, 2019
ssc
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16 min 2,442 words 212 comments podcast (18 min)
Scott Alexander examines the paradoxical relationship between autism and intelligence, discussing genetic and environmental factors, and proposing explanatory models for the observed lower IQ in autistic individuals despite genetic links to higher intelligence. Longer summary
Scott Alexander explores the paradoxical relationship between autism and intelligence. While genetic studies show a link between autism risk genes and high IQ, autistic individuals generally have lower intelligence than neurotypical controls. The post discusses three main causes of autism: common 'familial' genes that increase IQ, rare 'de novo' mutations that are often detrimental, and non-genetic factors like obstetric complications. Scott examines various studies and proposes that even after adjusting for mutations and environmental factors, autism still seems to decrease IQ. He introduces a 'tower-vs-foundation' model to explain this phenomenon, where intelligence needs a strong foundation to support it, and an imbalance can lead to autism. The post concludes with a list of findings and their associated confidence levels. Shorter summary
Oct 23, 2019
ssc
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16 min 2,336 words 261 comments podcast (19 min)
The post critically examines the impact of India's 1991 economic reforms, suggesting that the country's economic growth began earlier and that the causes are more complex than commonly believed. Longer summary
This post examines the economic reforms in India and their impact on poverty reduction and economic growth. The author challenges the widely held belief that the 1991 reforms were the primary cause of India's economic boom. By analyzing various studies and economic data, the post suggests that India's growth trajectory began earlier, possibly in the mid-1970s or early 1980s. The exact causes of this growth remain unclear, with various factors such as trade liberalization, public investment, and political attitudes towards business being potential contributors. The author also discusses the potential impact of socialist policies on developing countries and the importance of understanding these economic shifts for future policy-making and arguments against certain forms of socialism. Shorter summary
Apr 15, 2019
ssc
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68 min 10,501 words 363 comments podcast (69 min)
Scott Alexander examines the history of increasing competitiveness in college admissions, analyzing causes and questioning whether the focus on elite college admission is justified. Longer summary
Scott Alexander explores the history of college admissions and the increasing competitiveness in recent years. He traces the evolution from a time when top colleges admitted almost anyone qualified to the current highly competitive landscape. The post examines various factors contributing to this change, including increased applications per student, changing demographics, and shifts in evaluation criteria. Scott also investigates whether the intense focus on college admissions is justified, given research suggesting that attending a selective college may not significantly impact most students' long-term outcomes. Shorter summary
Feb 25, 2019
ssc
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42 min 6,438 words 288 comments podcast (53 min)
Scott analyzes wage stagnation since 1973, examining various explanations and concluding that while wages have risen 40-50%, there is still significant decoupling from productivity due to multiple factors. Longer summary
This post analyzes the apparent wage stagnation and decoupling from productivity since 1973. Scott examines various explanations, including measurement issues, demographic changes, inflation calculations, increasing inequality, and policy changes. He concludes that wages have actually risen about 40-50% since 1973, but there is still a significant 50% decoupling from productivity. The main factors are increasing wage inequality (40%), inflation miscalculations (35%), and labor vs. capital inequality (15%). Scott breaks down potential causes and their relative importance, while noting several remaining questions and uncertainties. Shorter summary
Nov 13, 2018
ssc
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35 min 5,299 words 164 comments podcast (38 min)
Scott Alexander critically examines studies on preschool effects, finding mixed and inconsistent evidence for long-term benefits. Longer summary
Scott Alexander reviews multiple studies on the long-term effects of preschool programs like Head Start. While early studies showed fade-out of test score gains, some found lasting benefits in adult outcomes. However, Scott finds inconsistencies between studies in which subgroups benefit and on which outcomes. He also notes concerns about potential p-hacking and researcher degrees of freedom. Ultimately, Scott concludes that the evidence is mixed - it permits believing preschool has small positive effects, but does not force that conclusion. He estimates 60% odds preschool helps in ways suggested by the studies, 40% odds it's useless. Shorter summary
Aug 01, 2018
ssc
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14 min 2,164 words 180 comments podcast (19 min)
Scott Alexander examines conflicting narratives about cancer treatment progress, analyzing data to show that while some improvements are due to social factors, there's evidence of genuine advancements in cancer treatment and outcomes. Longer summary
This post examines the progress made in the 'War on Cancer' by analyzing cancer incidence rates, mortality rates, and five-year survival rates. Scott Alexander explores two competing narratives: one suggesting significant progress and another claiming limited success. He delves into the data, considering factors like age adjustment, smoking trends, and early detection biases. The analysis reveals that while some improvements are due to social factors like reduced smoking, there's evidence of genuine progress in cancer treatment. Stage-specific survival rates have improved, and studies adjusting for various confounders still show advancements. The post concludes that while progress may not meet the grand expectations set in the past, there has been a gradual but real improvement in cancer treatment and outcomes. Shorter summary
Jul 10, 2018
ssc
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34 min 5,247 words 154 comments podcast (36 min)
Scott Alexander examines melatonin's effects, proper dosage, and uses for sleep disorders and circadian rhythm issues, emphasizing its dual role as a hypnotic and chronobiotic. Longer summary
Scott Alexander provides an in-depth analysis of melatonin, its effects, and proper usage. He explains that melatonin functions as both a hypnotic (inducing sleep) and a chronobiotic (shifting circadian rhythms). The post covers optimal dosing (0.3 mg, much lower than commonly available doses), use in treating circadian rhythm disorders, jet lag, and potential connections to other psychiatric conditions like seasonal affective disorder and depression. Scott also discusses personal experiences with melatonin, including its tendency to cause early waking and vivid dreams in some people. Shorter summary
Feb 19, 2018
ssc
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44 min 6,782 words 523 comments podcast (56 min)
Scott Alexander examines evidence for technological unemployment, finding little current impact but signs of 'technological underemployment' pushing workers to lower-skill jobs. Longer summary
Scott Alexander examines the arguments for and against technological unemployment, analyzing labor force participation rates, manufacturing job losses, and economic data to determine if automation is currently causing significant job displacement. He concludes that while there's little evidence of technological unemployment happening right now, there are signs of 'technological underemployment' where automation is pushing workers from middle-skill to lower-skill jobs. The long-term impacts remain uncertain, with economists divided on whether this is a temporary adjustment or a new normal. Shorter summary
Dec 28, 2017
ssc
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48 min 7,424 words 239 comments podcast (53 min)
Scott Alexander examines the risks of Adderall use, analyzing medical, addiction, tolerance, and neurotoxicity concerns, concluding that the benefits outweigh the risks for well-informed patients. Longer summary
Scott Alexander explores the risks of Adderall use, examining medical risks, addiction potential, tolerance development, and possible neurotoxicity. He critically analyzes existing research and shares his clinical experience, ultimately concluding that while there are some concerning risks, they are not severe enough to stop prescribing stimulants to patients who might benefit from them, provided they are well-informed about the risks. Shorter summary
Mar 06, 2017
ssc
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42 min 6,448 words 123 comments
Scott Alexander critically examines pharmacogenomic testing for antidepressants, particularly the GeneSight test, expressing skepticism about its current effectiveness and validity. Longer summary
Scott Alexander critically examines the field of pharmacogenomics for antidepressants, particularly focusing on the GeneSight test. He reviews the scientific evidence, discusses potential flaws in studies, and expresses skepticism about the current state and effectiveness of such testing. The post delves into the complexities of antidepressant metabolism, the challenges of predicting drug response, and the limitations of current genetic testing approaches. Shorter summary
May 19, 2016
ssc
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49 min 7,545 words 625 comments
Scott Alexander reviews research on teacher effectiveness, examining Value-Added Modeling (VAM) and its criticisms, while expressing uncertainty about claimed long-term impacts on adult earnings. Longer summary
Scott Alexander reviews research on teacher effectiveness, focusing on Value-Added Modeling (VAM) and its criticisms. He explores studies showing teachers account for about 10% of variance in student test scores, with effects decaying quickly over time. However, some controversial studies claim long-term impacts on adult earnings. Scott examines methodological issues, potential biases, and alternative explanations, ultimately expressing uncertainty about the validity of these long-term effects. He suggests non-cognitive factors like behavior might explain persistent impacts if they exist, but remains skeptical given the contrast with research showing minimal parental influence on outcomes. Shorter summary
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