Tuesday, December 30, 2025

 

Estimating unemployment rates with social media data



PNAS Nexus




Social media posts about unemployment can predict official jobless claims up to two weeks before government data is released, according to a study. Unemployment can be tough, and people often post about it online. Sam Fraiberger and colleagues developed an artificial intelligence model that identifies unemployment disclosures on social media. Data from 31.5 million Twitter users posting between 2020 and 2022 was used to train a transformer-based classifier called JoblessBERT to detect unemployment-related posts, even those that featured slang or misspellings, such as “I needa job!”. The authors used demographic adjustments to account for Twitter's non-representative user base, then forecast US unemployment insurance claims at national, state, and city levels. The model captured nearly three times more unemployment disclosures than previous rule-based approaches while maintaining high precision. The method also reduced forecasting errors by 54.3% compared to industry consensus forecasts. The approach proved particularly valuable during the COVID-19 pandemic, when it detected the massive surge in unemployment claims in March 2020 days before official statistics were released. According to the authors, the methodology demonstrates how AI models combined with social media data can complement traditional economic statistics and provide real-time insights for policymaking, especially during economic crises.

 

Examining private equity’s role in fertility care



Researchers find over 50% of IVF cycles are now done at fertility clinics affiliated with private equity firms




Michigan Medicine - University of Michigan






The rise of private equity firms investing in health care facilities across the United States has been exploding in the last decade.

Because of that rapid growth, researchers have been digging into what this could mean for health care and patients in the long term.

In recent years, private equity firms have become more active in the fertility space, where many patients seek care for reproductive issues and pursue in vitro fertilization, or IVF, which costs thousands of dollars, and usually isn’t covered by insurance.

James Dupree, M.D., M.P.H., and his colleagues wanted to explore what these changes could mean for patients with infertility.  Dupree is a professor of urology and obstetrics and gynecology at the University of Michigan Medical School, who directs U-M Health’s Male Fertility Preservation Program and studies fertility care.

In their new paper published in JAMA, the team shows that since 2013, expansive growth has been seen in affiliations between fertility clinics and private equity firms.

They also find that over half of IVF cycles in the country in 2023 were done at clinics affiliated with private equity firms.

More about the paper

A federal law requires every fertility clinic to report data about their IVF cycles to the federal Centers for Disease Control and Prevention.

The team used those reports from 2013 to 2022 to examine every IVF clinic in the country, which includes private practices and hospital-based clinics.

They used other databases and online searches to identify which clinics were affiliated with private equity firms.

What they found was pretty dramatic growth. In 2013, only 4% of fertility clinics were affiliated with private equity firms. But since then, the number has exploded.

“As of 2023, we estimate that 32% of IVF clinics were affiliated with private equity firms,” explained Dupree. “And these clinics affiliated with these private equity firms are performing over half of the IVF cycles in the country.”

So what does that mean?

“There’s a lot we don’t know yet. It might be good for patients; it costs a lot of money to modernize IVF laboratory equipment and perform outreach to patients and private equity firms can provide capital to hopefully improve quality and patient care.”

He also explains that in other health care settings outside fertility care, there’s data to suggest quality could decline while costs increase.

“We don’t know yet in the fertility world whether this is a net gain for patients or net loss,” he said.

Dupree emphasizes how private equity-supported fertility care will be a crucial business model to continue examining, especially with the government’s recent interest in making IVF care more accessible to Americans with infertility.

He said, “Given how prevalent the business model is, we need to do more research and understand the benefits and risks — like the quality of care, cost of care, access to care — are they better or are they worse?”

As a top researcher in the area, Dupree and his team will continue his work looking into fertility care across the United States, including  how IVF is covered by insurance companies, to help hopefully inform future health policies and help patients in the long run.

The study’s first author, Jesper Ke, M.D., MBA, is a resident physician at the Yale School of Medicine, and graduated from the U-M Medical School and Ross School of Business in 2025. Other authors are U-M medical student Joshua Chen, U-M statistician Elena Chun, M.S., and U-M urology professor Vahakn Shahinian, M.D.

Dupree and Shaninian are members of the U-M Institute for Healthcare Policy and Innovation, which sponsored the research through a grant from its Policy Sprints program.

Paper cited: “Trends in Private Equity Affiliations with Fertility Clinics in the US,” JAMA, doi:10.1001/jama.2025.24516

Written by Johanna Younghans Baker

 

Satellite communication systems: the future of 5G/6G connectivity




Higher Education Press
Integrating satellites with 5G/6G networks. 

image: 

ISL: inter-satellite link; gNB: next-generation NodeB.

view more 

Credit: Afang Yuan, Zhihua Yang, Zhili Sun





The integration of satellite communication systems with terrestrial networks is emerging as a crucial solution to achieve seamless global connectivity in the evolving landscape of 5G and future 6G networks. A recent article published in Engineering titled “Evolution of Satellite Communication Systems Toward 5G/6G for 2030 and Beyond” provides a comprehensive overview of the advancements, challenges, and future directions in this domain.

 

According to the article, terrestrial networks (TNs) have made significant strides from 1G to 4G, and now 5G, in increasing communication speeds and improving quality of service. However, these networks face limitations in remote or sparsely populated areas due to geographical constraints, high deployment costs, and insufficient bandwidth. This is where satellite communication systems come into play, offering a promising solution to provide global coverage, low latency, and high throughput.

 

The authors highlight that satellite networks are becoming an integral part of future 5G/6G systems, combining with TNs to form a unified communication infrastructure. Satellites at various orbital altitudes—geostationary Earth-orbit (GEO), medium-Earth-orbit (MEO), and low-Earth-orbit (LEO)—serve different roles, such as access, forwarding, and relay nodes. For instance, GEO satellites are suitable for fixed satellite services with high latency, while LEO satellites offer low latency and are ideal for global broadband access and Internet of Things (IoT) connectivity.

 

Significant advancements have bridged the gap between satellite communication and TNs. High-throughput satellites, mega-constellations in LEO, and improved payloads with beamforming and onboard processing have reduced latency and increased capacity. The development of inter-satellite links (ISLs), particularly optical ISLs, has also been a game-changer, offering higher data rates and better interference immunity. However, challenges remain, including high deployment costs and the need for precise beam alignment in large-scale constellations.

 

The article also discusses the role of international standardization bodies such as the 3rd Generation Partnership Project (3GPP) and International Telecommunication Union (ITU) in facilitating the integration of satellite networks with TNs. 3GPP has released a series of technical reports and specifications to support  non-terrestrial network (NTN) integration, with each release progressively enhancing the capabilities of satellite systems within 5G and future networks. For example, Release 17 marked the first time NTNs were incorporated as a core element within the 5G system architecture, supporting features like direct-to-device satellite links and IoT applications.

 

Looking ahead, the authors identify key challenges and potential research directions for satellite communication systems in 5G/6G. These include managing long propagation delays, high Doppler shifts, efficient resource management, dynamic beam coverage adaptation, mobility and handover management, and optimal routing and path selection. Future research may focus on leveraging technologies such as AI-driven network management, direct smartphone access to satellites, mega-LEO constellations, spectrum sharing, optical wireless communication, and reconfigurable intelligent surfaces.

 

The integration of satellite communication systems with terrestrial networks is a significant trend in the evolution from 5G to 6G. As research and development continue, addressing the identified challenges will be crucial to realizing the full potential of seamless global connectivity for future communication networks.

 

The paper “Evolution of Satellite Communication Systems Toward 5G/6G for 2030 and Beyond,” is authored by Afang Yuan, Zhihua Yang, Zhili Sun. Full text of the open access paper: https://doi.org/10.1016/j.eng.2025.06.025. For more information about Engineering, visit the website at https://www.sciencedirect.com/journal/engineering.