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Abstract of a paper on NBER: There is much disagreement about the extent to which financial incentives motivate study participants. We elicit preferences for being paid for completing a survey, including a one-in-twenty chance of winning a $100 electronic gift card, a guaranteed electronic gift card with the same expected value, and an option to refuse payment. More than twice as many participants chose the lottery as chose the guaranteed payment. Given that most people are risk averse, this pattern suggests that factors beyond risk preferences -- such as hassle costs -- influenced their decision-making. Almost 20 percent of participants actively refused payment, demonstrating low monetary motivation. We find both systematic and unobserved heterogeneity in the characteristics of who turned down payment. The propensity to refuse payment is more than four times as large among individuals 50 and older compared to younger individuals, suggesting a tradeoff between financially motivating participants and obtaining a representative sample. Overall, our results suggest that modest electronic gift card payments violate key requirements of Vernon Smith's induced value theory.

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Facebook Marketplace has emerged as the dominant feature within the social media platform, amassing 1.2 billion monthly active buyers by 2023 and overtaking eBay as a peer-to-peer selling platform. According to recent data, approximately 16 percent of Facebook's monthly active users now access the site exclusively to participate in Marketplace. The feature's growth accelerated following the pandemic's supply chain disruptions and subsequent inflation, which increased demand for used goods. Facebook reports that Marketplace is attracting younger demographics who have otherwise abandoned the platform's social features. This shift represents a fundamental transformation of Facebook's core function from "digital connector" to "digital bazaar," with the platform increasingly hosting transactions rather than social connections.

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Adobe has deleted all its posts on Twitter-alternative Bluesky after a disastrous April 8 debut that drew over 1,600 angry comments from digital creators. The software giant's innocuous first post asking "What's fueling your creativity right now?" triggered immediate criticism targeting Adobe's controversial subscription model, continual price increases, and AI implementation. "Y'all keep raising your prices for a product that keeps getting worse," wrote one user, while another referenced Adobe's "subscription model" with "I assume you'll be charging us monthly to read your posts." Recent price hikes have been substantial, with one commenter reporting a 53.88% increase from CDN$14.68 to CDN$22.59 monthly.

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An anonymous reader shares a report: The number of European travellers visiting the US has fallen sharply as political and economic tension and fears of a hostile border under President Donald Trump threaten the world's most lucrative air routes. Visitors from western Europe who stayed at least one night in the US fell by 17 per cent in March from a year ago, according to the International Trade Administration. Travel from some countries -- including Ireland, Norway and Germany -- fell by more than 20 per cent, an FT analysis of ITA data showed. The trend poses a threat to the US tourism industry, which accounts for 2.5 per cent of the country's GDP. Some airlines and hotel groups have warned of waning demand for transatlantic travel and a "bad buzz" about visiting the US. The total number of overseas visitors travelling to the US dropped by 12 per cent year-on-year in March, the steepest decline since March 2021 when the travel sector was reeling from pandemic restrictions, according to the ITA data.

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A group of ex-OpenAI employees on Friday filed a proposed amicus brief in support of Elon Musk in his lawsuit against OpenAI, opposing OpenAI's planned conversion from a nonprofit to a for-profit corporation. From a report: The brief, filed by Harvard law professor and Creative Commons founder Lawrence Lessig, names 12 former OpenAI employees: Steven Adler, Rosemary Campbell, Neil Chowdhury, Jacob Hilton, Daniel Kokotajlo, Gretchen Krueger, Todor Markov, Richard Ngo, Girish Sastry, William Saunders, Carrol Wainwright, and Jeffrey Wu. It makes the case that, if OpenAI's non-profit ceded control of the organization's business operations, it would "fundamentally violate its mission." Several of the ex-staffers have spoken out against OpenAI's practices publicly before. Krueger has called on the company to improve its accountability and transparency, while Kokotajlo and Saunders previously warned that OpenAI is in a "reckless" race for AI dominance. Wainwright has said that OpenAI "should not [be trusted] when it promises to do the right thing later."

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Knowing how frequently accessed a page of memory is (its "hotness") is a key input to many memory-management heuristics. Jonathan Cameron, in a memory-management track at the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit, pointed out that the number of sources of that kind of data is growing over time. He wanted to explore the questions of what commonality exists between data from those sources, and whether it makes sense to aggregate them all somehow.

The International Civil Aviation Organization plans to eliminate boarding passes and check-ins within three years through a new "digital travel credential" system. Passengers will store passport data on their phones and use facial recognition to move through airports, while airlines will automatically detect arrivals via biometric scanning. The system will dynamically update "journey passes" for flight changes and delays, potentially streamlining connections. "The last upgrade of great scale was the adoption of e-ticketing in the early 2000s," said Valerie Viale from travel technology company Amadeus, who noted passenger data will be deleted within 15 seconds at each checkpoint to address privacy concerns.

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Fedora has proposed a major change for its upcoming version 43 release that aims to achieve 99% package reproducibility, addressing growing concerns about supply-chain security. According to the change proposal announced March 31, Fedora has already reached 90% reproducibility through infrastructure changes including "clamping" file modification times and implementing a Rust-based "add-determinism" tool that standardizes metadata. The remaining 10% will require individual package maintainer involvement, treating reproducibility failures as bugs. The effort will use a public instance of rebuilderd to independently verify that binary packages can be reproduced from source code. Unlike Debian's bit-by-bit reproducibility definition, Fedora allows differences in package signatures and some metadata while requiring identical payloads. The initiative follows similar efforts by Debian and openSUSE, and comes amid heightened focus on supply-chain security after the recent XZ backdoor incident.

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Germany will get a new "super-high-tech ministry" responsible for research, technology, and aerospace, according to the coalition agreement published by the incoming government this week. From a report: The announcement is one of several nods to science in the 144-page agreement, unveiled on 9 April following weeks of negotiations between the center-right Christian Democrats (CDU) and its sister party, the Christian Social Union in Bavaria (CSU) -- who together won the most seats in February's federal elections -- and the center-left Social Democrats. The agreement is expected to be formally approved by the three parties by early May, paving the way for CDU leader Friedrich Merz to be elected chancellor. [...] The new agreement lists a number of scientific priorities for the new government, including support for artificial intelligence, quantum technologies, biotechnology, microchip development and production, and fusion energy. "Our goal is that the world's first fusion reactor should be realized in Germany," the text states. It also mentions personalized medicine, oceans research, and sustainability research as "strategic" areas. But the agreement does not include any budget estimates, and observers caution it is unclear where the money for new programs would come from. The agreement does affirm current commitments to increase the budgets of the country's main research organizations by 3% per year through 2030.

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The ubiquitous but often overlooked Wi-Fi router lies at the heart of one of Washington's biggest national security dilemmas -- and a rift between two brothers on opposite sides of the Pacific. From a report: US investigators are probing the China ties of TP-Link, the new American incarnation of a consumer Wi-Fi behemoth, following its rapid growth and a spate of cyber attacks by Chinese state-sponsored actors targeting many router brands. The inquiry is testing whether TP-Link's corporate makeover represents enough of a divorce from China to spare it from a ban in a crucial market. While TP-Link's recent restructuring split the company into separate US- and China-headquartered businesses, a Bloomberg News investigation found that the resulting American venture still has substantial operations in mainland China. If US officials conclude TP-Link's China connections pose an "unacceptable risk," they could use a powerful new authority to ban the company from the US. Such an outcome could also unravel plans by the owner of its US business, Jeffrey Chao, to start fresh in California following an estrangement from his older brother, who started the router business with him in Shenzhen nearly three decades ago. In an interview -- the first Jeffrey Chao said he has ever given -- he told Bloomberg he's quitting China. He opened a new headquarters in Irvine last year and said he will invest $700 million in the US to build a factory and jumpstart research and development on highly secure routers while awaiting the green card he said he applied for in January. He has also traded his perch in a Hong Kong skyscraper for a 1980s-era split-level near his office, joined a neighborhood evangelical church, and is now eyeing a Cadillac Escalade for road trips, he said, burnishing his American credentials. "I know the current relationship between the US and China is complex," Chao said in the interview last month. "I have chosen the US."

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Ubisoft has triggered fresh debate over digital ownership by claiming in court that customers who purchased The Crew never truly owned the game. The legal battle began when California plaintiffs sued after Ubisoft deactivated servers for the 2014 racing title, rendering it unplayable beyond a restricted demo version. Unlike most delisted games where previously purchased copies remain accessible, Ubisoft completely removed The Crew from customers' libraries. The plaintiffs, who bought physical copies years ago, contend that Ubisoft misled consumers and point to competitors who provided offline modes for end-of-life titles. Ubisoft counters that packaging clearly stated purchases only granted temporary licenses. The case has expanded to include claims about in-game currency qualifying as gift certificates under California law and activation codes promised to work until 2099.

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Eduard Zingerman presented a daring proposal that "makes sense if you think about it a bit" at the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit. He wants to inline performance-sensitive kernel functions into the BPF programs that call them. His prototype does not yet address all of the design problems inherent in that idea, but it did spark a lengthy discussion about the feasibility of his proposal.

France is to tighten its ban on the use of mobile phones in middle schools, making pupils at the ages of 11 to 15 shut away their devices in a locker or pouch at the start of the day and access them again only as they are leaving. A report adds: The education minister told the senate she wanted children to be fully separated from their phones throughout the school day in all French middle schools from September. Elisabeth Borne said: "At a time when the use of screens is being widely questioned because of its many harmful effects, this measure is essential for our children's wellbeing and success at school." In 2018, France banned children from using mobile phones in all middle schools -- known as colleges. Phones must remain switched off in schoolbags and cannot be used anywhere in the school grounds, including at break-time. Schools have reported a positive effect, with more social interaction, more physical exercise, less bullying and better concentration. But some did report a few children would sneak into the toilets to watch videos on phones at break.

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An anonymous reader shares a report: China's Anker, one of Amazon's largest sellers offering products from power banks to phone cases, has raised prices on a fifth of its products on the U.S. platform since Thursday, in a sign that tariffs on Chinese goods are being passed on to U.S. shoppers. Some 127 Anker products have seen an average increase of 18% since Thursday last week, with the majority of those occurring after Monday, April 7, when U.S. President Donald Trump added an extra 50% import duty on Chinese goods, according to data from e-commerce services provider SmartScout. U.S. import tariffs on Chinese products now stand at 145%. Beijing on Friday raised its tariff on U.S. goods to 125%, as a trade war between the world's top two economies intensifies.

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Director James Cameron argues that blockbuster filmmaking can only survive if the industry finds ways to "cut the cost of [VFX] in half," with AI potentially offering solutions that don't eliminate jobs. "If we want to continue to see the kinds of movies that I've always loved and that I like to make -- 'Dune,' 'Dune: Part Two,' or one of my films or big effects-heavy, CG-heavy films -- we've got to figure out how to cut the cost of that in half," Cameron said. Rather than staff reductions, Cameron envisions AI accelerating VFX workflows: "That's about doubling their speed to completion on a given shot, so your cadence is faster and your throughput cycle is faster, and artists get to move on and do other cool things."

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Almost 200 pesticides have been found by a study examining dust in homes around Europe, as scientists say regulators need to take "toxic cocktails" of chemicals into account when banning or restricting the use of pesticides. From a report: Scientists say their research supports the idea that regulators should assess the risks posed by pesticides when they react with other chemicals, as well as individually. They say this should apply to substances already in use, as well as those yet to be approved. In preliminary findings from the largest study of its kind, scientists examining household dust from homes in 10 European countries in 2021 detected 197 pesticides in total. More than 40% of the pesticides found in the dust have been linked to highly toxic effects, including cancer and disruption of the hormonal system in humans. The number of pesticides in each home ranged between 25 and 121, and levels of pesticides tended to be higher in the homes of farmers. Prof Paul Scheepers, of the Radboud Institute for Biological and Environmental Sciences, said: "We have many epidemiological studies showing that diseases are associated with mixtures of pesticides."

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Security updates have been issued by AlmaLinux (delve and golang and go-toolset:rhel8), Debian (webkit2gtk), Fedora (openvpn, thunderbird, uboot-tools, and zabbix), SUSE (expat, fontforge, govulncheck-vulndb, and kernel), and Ubuntu (haproxy and libsoup2.4, libsoup3).

Defense Secretary Pete Hegseth has ordered the termination of multiple IT and consulting contracts with firms including Accenture, Deloitte, and Booz Allen Hamilton, describing them as "wasteful spending." A Department of Defense memo indicates the cuts target the Defense Health Agency's consulting services contract and the Air Force's agreement with Accenture to "re-sell third-party Enterprise Cloud IT Services," services the government can "already fulfill directly with existing procurement resources." The terminations also include 11 other contracts supporting "non-essential" activities like DEI programs, climate initiatives, and COVID-19 response efforts. The cuts represent $5.1 billion in spending and will yield nearly $4 billion in savings, according to Hegseth. The funds will be redirected toward "critical priorities to Revive the Warrior Ethos, Rebuild the Military, and Reestablish Deterrence," with Hegseth noting the money would better serve "healthcare for our warfighters and their families, instead of $500 an hour business process consultant."

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China responded to President Trump's tariffs on Friday, raising its own tariffs on American goods to 125%, from 84%. The New York Times: The announcement by China's State Council came after Trump administration officials clarified on Thursday that China was now facing a minimum tariff rate of 145% on all exports to United States. China said its new tariffs will take effect on Saturday. China said it plans to ignore any further increases announced by Washington from here. Bloomberg: In a statement following China's retaliatory move, the Commerce Ministry said Washington's repeated use of excessively high tariffs has become little more than a numbers game -- economically meaningless and revealing its use of tariffs as a tool for bullying and coercion. "It's become a joke," the ministry said. CNN: The trade war between the world's two economic superpowers has tanked international markets and fueled fears of a global recession. "There are no winners in a trade war, and going against the world will only lead to self-isolation," [Chinese leader] Xi Jinping told Spanish Prime Minister Pedro Sanchez in Beijing on Friday, according to state broadcaster CCTV. "For over 70 years, China's development has relied on self-reliance and hard work -- never on handouts from others, and it is not afraid of any unjust suppression," Xi added.

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The Food and Drug Administration says it would begin phasing out animal testing requirements for antibody therapies and other drugs and move toward AI-based models and other tools it deems "human-relevant." Axios: The FDA said it would launch a pilot program over the next year allowing select developers of monoclonal antibodies to use a primarily non-animal-based testing strategy. Commissioner Marty Makary in a statement said the shift would improve drug safety, lower research and development costs and address ethical concerns about animal experimentation.

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