Nature Climate Change, Published online: 08 August 2025; doi:10.1038/s41558-025-02400-3

Estimating transition risk is important for the banking sector, yet current practices still rely on conceptual scenarios. Now, a study provides a concrete approach to help regulators calculate the immediate risk that banks face from exposure to climate policy shocks.

Enter the basement in one of MIT’s iconic buildings and you’ll find students hammering on anvils and forging red-hot metal into blades. This hands-on lesson in metallurgy is captured in the documentary “That Creative Spark,” which won an Emmy Award for the Education/Schools category at the 48th annual Boston/New England Emmy Awards Ceremony held in Boston in June.

“It’s wonderful to be recognized for the work that we do,” says Clayton Hainsworth, director of MIT Video Productions at MIT Open Learning. “We’re lucky to have incredible people who have decided to bring their outstanding talents here in order to tell MIT’s stories.”

The National Academy of Television Arts and Sciences Boston/New England Chapter recently honored Hainsworth, the documentary’s executive producer; Joe McMaster, director/producer; and Wesley Richardson, cinematographer.

“That Creative Spark” spotlights a series of 2024 Independent Activities Period (IAP) classes about bladesmithing, guest-taught by Bob Kramer, a world-renowned maker of hand-forged knives. In just one week, students learned how to grind, forge, and temper blocks of steel into knives sharp enough to slice through a sheet of paper without resistance.

“It’s an incredibly physical task of making something out of metal,” says McMaster, senior producer for MIT Video Productions. He says this tangible example of hands-on learning “epitomized the MIT motto of ‘mens et manus’ [‘mind and hand’].”

The IAP Bladesmithing with Bob Kramer course allowed students to see concepts and techniques like conductivity and pattern welding in action. Abhi Ratna Sharda, a PhD student at the Department of Materials Science and Engineering (DMSE), still recalls the feeling of metal changing as he worked on it.

“Those are things that you can be informed about through readings and textbooks, but the actual experience of doing them leaves an intuition you’re not quick to forget,” Sharda says.

Filming in the forge — the Merton C. Flemings Materials Processing Laboratory — is not an experience the MIT Video Productions team will be quick to forget, either. Richardson, field production videographer at MIT Video Productions, held the camera just six feet away from red-hot blades being dipped into tubs of oil, creating minor fireballs and plumes of smoke.

“It’s intriguing to see the dexterity that the students have around working with their hands with very dangerous objects in close proximity to each other,” says Richardson. “Students were able to get down to these really precise knives at the end of the class.”

Some people may be surprised to learn that MIT has a working forge, but metalworking is a long tradition at the Institute. In the documentary, Yet-Ming Chiang, Kyocera Professor of Ceramics at DMSE, points out a clue hidden in plain sight: “If you look at the MIT logo, there’s a blacksmith, and ‘mens et manus’ — ‘mind and hand,’” says Chiang, referring to the Institute’s official seal, adopted in 1894. “So the teaching and the practice of working with metals has been an important part of our department for a long time.”

Chiang invited Kramer to be a guest instructor and lecturer for two reasons: Kramer is an industry expert, and he achieved success through hands-on learning — an integral part of an MIT education. After dropping out of college and joining the circus, Kramer later gained practical experience in service-industry kitchens and eventually became one of just 120 Master Bladesmiths in the United States today.

“This nontraditional journey of Bob’s inspires students to think about projects and problems in different ways,” Hainsworth says.

Sharda, for example, is applying the pattern welding process he learned from Kramer in both his PhD program and his recreational jewelry making. The effect creates striking visuals — from starbursts to swirls looking like agate geodes, and more — that extend all the way through the steel, not just the surface of the blade.

“A lot of my research has to do with bonding metals and bonding dissimilar metals, which is the foundation for pattern welding,” Sharda says, adding how this technique has many potential industrial applications. He compares it to the mokume-gane technique used with precious metals, a practice he encountered while researching solid-state welding methods.

“Seeing that executed in a space where it’s very difficult to achieve that level of precision — it inspired me to polish all the tightest nooks and crannies of the pieces I make, and make sure everything is as flawless as possible,” Sharda adds.

In the documentary, Kramer reflects on his month of teaching experience: “When you give someone the opportunity and guide them to actually make something with their hands, there’s very few things that are as satisfying as that.”

In addition to highlighting MIT’s hands-on approach to teaching, “That Creative Spark” showcases the depth of its unique learning experiences.

“There are many sides to MIT in terms of what the students are actually given access to and able to do,” says Richardson. “There is no one face of MIT, because they're highly gifted, highly talented, and often those talents and gifts extend beyond their courses of study.”

That message resonates with Chiang, who says the class underscores the importance of hands-on, experimental research in higher education.

“What I think is a real benefit in experimental research is the physical understanding of how objects and forces relate to each other,” he says. “This kind of class helps students — especially students who’ve never had that experience, never had a job that requires real hands-on work — gain an understanding of those relationships.”

Hainsworth says it’s wonderful to collaborate with his team to tell stories about the spirit and generosity of Institute faculty, guest speakers, and students. The documentary was made possible, in part, thanks to the generous support of A. Neil Pappalardo ’64 and Jane Pappalardo.

“It really is a joy to come in every day and collaborate with people who care deeply about the work they do,” Hainsworth says. “And to be recognized with an Emmy, that is very rewarding.”

Jason Sparapani contributed to this story.

The various aspects of design — such as creation, function, and aesthetic — can be applied to many different disciplines and provide them with a value. While this is universally true for architecture, it has not traditionally been acknowledged for real estate, despite the close association between the two. Traditionally, real estate valuation has been determined by certain sales factors: income generated, recent similar sales, and replacement costs.

Now, a new book by researchers at MIT explores how design can be quantified in real estate valuation. “Value of Design: Creating Agency Through Data-Driven Insights” (Applied Research and Design Publishing) uses data-driven research to reveal how design leaves measurable traces in the built environment that correlate with real economic, social, and environmental outcomes.

The late MIT Research Scientist Andrea Chegut, along with Visiting Instructor Minkoo Kang SMRED ’18, Helena Rong SMArchS ’19, and Juncheng “Tony” Yang SMArchS ’19, present a body of years of interdisciplinary social science research that weave together historical context, real-world case studies, and critical reflections that engage a broader dialogue on design, value, and the built environment.

Kang, Rong, and Yang met as students at the MIT Real Estate Innovation Lab, which was co-founded and directed by Chegut, who passed away in December 2022. Under Chegut’s direction, interdisciplinary research at the lab helped establish the analytical tools and methodologies that underpin the book’s core arguments. The lab formerly closed after Chegut’s passing.

Q: How might the tools used in this research impact how an investor or real estate developer makes decisions on a property?

Kang: This book doesn’t offer a formula for replicable outcomes, nor should it. Real estate is deeply contextual, and every project carries its own constraints and potential. What our research provides is evidence: looking back at 20 years of patterns in New York City data, we see that design components — physical features such as podiums, unique non-orthogonal geometries, and high-rise setbacks; environmental qualities like daylight access, greenery, and open views; and a building’s contextual fit within its neighborhood — has a more substantial and consistent influence on value than the industry tends to credit.

Rong: One reason design has been left out of valuation practice is the siloing of architectural information: drawings stay inside individual firms, and there are no standards for identifying or quantifying the components that make up a design. We have countless databases, but never a true “design database.” This book starts to fill that gap by inventorying architectural features and showing how to measure them with both insights from architectural theory and exploration of computational methods and tools. Using today’s reality-capture technologies and the large-scale transaction data we obtained, we uncovered long-term patterns: Buildings that invested in thoughtful design often performed better, not only in financial terms, but also in how they contributed to neighborhood identity and sustained demand. The takeaway isn’t prescriptive, but directional. Design should not be treated as an aesthetic afterthought, or an intangible variable. Its impact is durable, measurable, and, importantly, undervalued, which is why it is something developers and investors should not only pay attention to, but actively prioritize.

Q: Can you share an example of how design influences urban change?

Kang: As a designer and real estate developer, my work sits at the intersection of architecture, finance, and neighborhood communities. I often collaborate with resident stakeholders to reimagine overlooked or underutilized properties as meaningful, long-term assets — using design both as a tool to shape development strategy and as a medium for community engagement and consensus building.

One recent example involved supporting a longtime property owner in transforming their single-family home into a 40-unit, mixed-income apartment building. Rather than maximizing density at all costs, the project prioritized livability, sustainability, and contextual fit — compact units with generous access to light and air, shared amenities like co-working space and a community room, and passive house-level energy performance.

Through design, we were able to unlock a new housing typology — one that balances financial feasibility with community ownership and long-term affordability. It’s a reminder that design’s influence on urban change extends beyond aesthetics or form. It helps determine who development serves, how neighborhoods evolve, and what kinds of futures are made possible.

Q: How can this research be of use to policymakers?

Yang: Policymakers usually consider broader and longer-term urban outcomes: livability, resilience, equity, and community cohesion. This research provides the empirical foundation to connect those outcomes to concrete design choices.

By quantifying how design influences not just real estate performance, but neighborhood identity, access, and sustainability, the book offers policymakers a new evidence base to inform zoning, public incentives, and regulatory frameworks. But more than that, we think this kind of data-driven insight can help align interests across the ecosystem: urban planners, private developers, community organizations, and residents, by demonstrating that high-quality design delivers shared, long-term value.

In a time when urban space is increasingly contested, being able to point to measurable impacts of design helps shift debates from ideology to informed decision-making. It gives public agencies a firmer ground to demand more, and to build coalitions around the kinds of neighborhoods we want to sustain. Basically, this research helps create agency by making design intelligible in urban spaces where key decisions are made. The kind of agency we’re interested in is not about control, but about influence and authorship. Design shapes how cities function and feel, who they serve, and how they change. Yet too often, those decisions are made without recognizing design’s role. By surfacing how design leaves durable, measurable traces in the built environment, this work gives designers and allied actors a stronger voice in shaping development and public discourse. It also invites broader participation: community groups, resident advocates, and others can use this evidence to articulate why building attributes and environmental quality matter. In this sense, the agency is distributed. It’s not just about empowering designers, but about equipping all stakeholders to see design as a shared, strategic tool for shaping more equitable, resilient, and humane urban futures.

The government of China has accused Nvidia of inserting a backdoor into their H20 chips:

China’s cyber regulator on Thursday said it had held a meeting with Nvidia over what it called “serious security issues” with the company’s artificial intelligence chips. It said US AI experts had “revealed that Nvidia’s computing chips have location tracking and can remotely shut down the technology.”

The administration must decide this month whether to again use emergency powers to keep open a coal plant near Grand Rapids.

The ruling against the city of Charleston comes as President Donald Trump has sought to clamp down on climate liability litigation.

The administration and its Republican allies in Congress say the International Energy Agency discourages fossil fuel investments around the world.

Blazes have released 180 million metric tons of carbon, breaking records in Manitoba and Saskatchewan and blanketing much of the U.S. in a smoky haze.

California Sen. Adam Schiff introduced legislation aimed at stabilizing state property insurance markets. Insurance groups say it's misguided.

The "green fee," which takes effect Jan. 1, 2026, will fund environmental projects, such as beach restoration or the removal of fire-prone grasses.

Floodwaters rushed down narrow mountains Tuesday into Dharali, a mountain village in northern India, sweeping away homes, roads and a local market.

The fire remained "very active" Wednesday, local officials said. The weather was hot, dry and windy, making it difficult for firefighters to contain the blaze.

Researchers concluded that in addition to 30 deaths attributed directly to the L.A. blaze, more than 400 others could have been due to interrupted health care.

Nature Climate Change, Published online: 07 August 2025; doi:10.1038/s41558-025-02373-3

The decarbonization of energy systems requires access to minerals that are critical for manufacturing low-carbon technologies. Here researchers show that meeting climate targets could be impeded by material shortages, revealing the importance of diverse solutions that balance mitigation, equity and resource constraints.

Any motorist who has ever waited through multiple cycles for a traffic light to turn green knows how annoying signalized intersections can be. But sitting at intersections isn’t just a drag on drivers’ patience — unproductive vehicle idling could contribute as much as 15 percent of the carbon dioxide emissions from U.S. land transportation.

A large-scale modeling study led by MIT researchers reveals that eco-driving measures, which can involve dynamically adjusting vehicle speeds to reduce stopping and excessive acceleration, could significantly reduce those CO2 emissions.

Using a powerful artificial intelligence method called deep reinforcement learning, the researchers conducted an in-depth impact assessment of the factors affecting vehicle emissions in three major U.S. cities.

Their analysis indicates that fully adopting eco-driving measures could cut annual city-wide intersection carbon emissions by 11 to 22 percent, without slowing traffic throughput or affecting vehicle and traffic safety.

Even if only 10 percent of vehicles on the road employ eco-driving, it would result in 25 to 50 percent of the total reduction in CO2 emissions, the researchers found.

In addition, dynamically optimizing speed limits at about 20 percent of intersections provides 70 percent of the total emission benefits. This indicates that eco-driving measures could be implemented gradually while still having measurable, positive impacts on mitigating climate change and improving public health.

“Vehicle-based control strategies like eco-driving can move the needle on climate change reduction. We’ve shown here that modern machine-learning tools, like deep reinforcement learning, can accelerate the kinds of analysis that support sociotechnical decision making. This is just the tip of the iceberg,” says senior author Cathy Wu, the Thomas D. and Virginia W. Cabot Career Development Associate Professor in Civil and Environmental Engineering (CEE) and the Institute for Data, Systems, and Society (IDSS) at MIT, and a member of the Laboratory for Information and Decision Systems (LIDS).

She is joined on the paper by lead author Vindula Jayawardana, an MIT graduate student; as well as MIT graduate students Ao Qu, Cameron Hickert, and Edgar Sanchez; MIT undergraduate Catherine Tang; Baptiste Freydt, a graduate student at ETH Zurich; and Mark Taylor and Blaine Leonard of the Utah Department of Transportation. The research appears in Transportation Research Part C: Emerging Technologies.

A multi-part modeling study

Traffic control measures typically call to mind fixed infrastructure, like stop signs and traffic signals. But as vehicles become more technologically advanced, it presents an opportunity for eco-driving, which is a catch-all term for vehicle-based traffic control measures like the use of dynamic speeds to reduce energy consumption.

In the near term, eco-driving could involve speed guidance in the form of vehicle dashboards or smartphone apps. In the longer term, eco-driving could involve intelligent speed commands that directly control the acceleration of semi-autonomous and fully autonomous vehicles through vehicle-to-infrastructure communication systems.

“Most prior work has focused on how to implement eco-driving. We shifted the frame to consider the question of should we implement eco-driving. If we were to deploy this technology at scale, would it make a difference?” Wu says.

To answer that question, the researchers embarked on a multifaceted modeling study that would take the better part of four years to complete.

They began by identifying 33 factors that influence vehicle emissions, including temperature, road grade, intersection topology, age of the vehicle, traffic demand, vehicle types, driver behavior, traffic signal timing, road geometry, etc.

“One of the biggest challenges was making sure we were diligent and didn’t leave out any major factors,” Wu says.

Then they used data from open street maps, U.S. geological surveys, and other sources to create digital replicas of more than 6,000 signalized intersections in three cities — Atlanta, San Francisco, and Los Angeles — and simulated more than a million traffic scenarios.

The researchers used deep reinforcement learning to optimize each scenario for eco-driving to achieve the maximum emissions benefits.

Reinforcement learning optimizes the vehicles’ driving behavior through trial-and-error interactions with a high-fidelity traffic simulator, rewarding vehicle behaviors that are more energy-efficient while penalizing those that are not.

However, training vehicle behaviors that generalize across diverse intersection traffic scenarios was a major challenge. The researchers observed that some scenarios are more similar to one another than others, such as scenarios with the same number of lanes or the same number of traffic signal phases.

As such, the researchers trained separate reinforcement learning models for different clusters of traffic scenarios, yielding better emission benefits overall.

But even with the help of AI, analyzing citywide traffic at the network level would be so computationally intensive it could take another decade to unravel, Wu says.

Instead, they broke the problem down and solved each eco-driving scenario at the individual intersection level.

“We carefully constrained the impact of eco-driving control at each intersection on neighboring intersections. In this way, we dramatically simplified the problem, which enabled us to perform this analysis at scale, without introducing unknown network effects,” she says.

Significant emissions benefits

When they analyzed the results, the researchers found that full adoption of eco-driving could result in intersection emissions reductions of between 11 and 22 percent.

These benefits differ depending on the layout of a city’s streets. A denser city like San Francisco has less room to implement eco-driving between intersections, offering a possible explanation for reduced emission savings, while Atlanta could see greater benefits given its higher speed limits.

Even if only 10 percent of vehicles employ eco-driving, a city could still realize 25 to 50 percent of the total emissions benefit because of car-following dynamics: Non-eco-driving vehicles would follow controlled eco-driving vehicles as they optimize speed to pass smoothly through intersections, reducing their carbon emissions as well.

In some cases, eco-driving could also increase vehicle throughput by minimizing emissions. However, Wu cautions that increasing throughput could result in more drivers taking to the roads, reducing emissions benefits.

And while their analysis of widely used safety metrics known as surrogate safety measures, such as time to collision, suggest that eco-driving is as safe as human driving, it could cause unexpected behavior in human drivers. More research is needed to fully understand potential safety impacts, Wu says.

Their results also show that eco-driving could provide even greater benefits when combined with alternative transportation decarbonization solutions. For instance, 20 percent eco-driving adoption in San Francisco would cut emission levels by 7 percent, but when combined with the projected adoption of hybrid and electric vehicles, it would cut emissions by 17 percent.

“This is a first attempt to systematically quantify network-wide environmental benefits of eco-driving. This is a great research effort that will serve as a key reference for others to build on in the assessment of eco-driving systems,” says Hesham Rakha, the Samuel L. Pritchard Professor of Engineering at Virginia Tech, who was not involved with this research.

And while the researchers focus on carbon emissions, the benefits are highly correlated with improvements in fuel consumption, energy use, and air quality.

“This is almost a free intervention. We already have smartphones in our cars, and we are rapidly adopting cars with more advanced automation features. For something to scale quickly in practice, it must be relatively simple to implement and shovel-ready. Eco-driving fits that bill,” Wu says.

This work is funded, in part, by Amazon and the Utah Department of Transportation.

Nature Climate Change, Published online: 07 August 2025; doi:10.1038/s41558-025-02394-y

The implementation gap between national climate targets and actual policies has been seen as a main barrier for decarbonization. Here researchers show it is rooted in the structural limitation of states and discuss future research directions to promote the emergence of transformative states.

The MIT Center for International Studies announced the launch of a new pilot initiative with Angola, to be implemented through its MIT-Africa Program.

The new initiative marks a significant collaboration between MIT-Africa, Sonangol (Angola’s national energy company), and the Instituto Superior Politécnico de Tecnologias e Ciências (ISPTEC). The collaboration was formalized at a signing ceremony on MIT’s campus in June with key stakeholders from all three institutions present, including Diamantino Pedro Azevedo, the Angolan minister of mineral resources, petroleum, and gas, and Sonangol CEO Gaspar Martins.

“This partnership marks a pivotal step in the Angolan government’s commitment to leveraging knowledge as the cornerstone of the country’s economic transformation,” says Azevedo. “By connecting the oil and gas sector with science, innovation, and world-class training, we are equipping future generations to lead Angola into a more technological, sustainable, and globally competitive era.”

The sentiment is shared by the MIT-Africa Program leaders. “This initiative reflects MIT’s deep commitment to fostering meaningful, long-term relationships across the African continent,” says Mai Hassan, faculty director of the MIT-Africa Program. “It supports our mission of advancing knowledge and educating students in ways that are globally informed, and it provides a platform for mutual learning. By working with Angolan partners, we gain new perspectives and opportunities for innovation that benefit both MIT and our collaborators.”

In addition to its new collaboration with MIT-Africa, Sonangol has joined MIT’s Industrial Liaison Program (ILP), breaking new ground as its first corporate member based in sub-Saharan Africa. ILP enables companies worldwide to harness MIT resources to address current challenges and to anticipate future needs. As an ILP member, Sonangol seeks to facilitate collaboration in key sectors such as natural resources and mining, energy, construction, and infrastructure.

The MIT-Africa Program manages a portfolio of research, teaching, and learning initiatives that emphasize two-way value — offering impactful experiences to MIT students and faculty while collaborating closely with institutions and communities across Africa. The new Angola collaboration is aligned with this ethos, and will launch with two core activities during the upcoming academic year:

1. Global Classroom: An MIT course on geo-spatial technologies for environmental monitoring, taught by an MIT faculty member, will be brought directly to the ISPTEC campus, offering Angolan students and MIT participants a collaborative, in-country learning experience.
2. Global Teaching Labs: MIT students will travel to ISPTEC to teach science, technology, engineering, arts, and mathematics subjects on renewable energy technologies, engaging Angolan students through hands-on instruction.

“This is not a traditional development project,” says Ari Jacobovits, managing director of MIT-Africa. “This is about building genuine partnerships rooted in academic rigor, innovation, and shared curiosity. The collaboration has been designed from the ground up with our partners at ISPTEC and Sonangol. We’re coming in with a readiness to learn as much as we teach.”

The pilot marks an important first step in establishing a long-term collaboration with Angola. By investing in collaborative education and innovation, the new initiative aims to spark novel approaches to global challenges and strengthen academic institutions on both sides.

These agreements with MIT-Africa and ILP “not only enhance our innovation and technological capabilities, but also create opportunities for sustainable development and operational excellence,” says Gaspar. “They advance our mission to be a leading force in the African energy sector.”

“The vision behind this initiative is bold,” says Hassan. “It’s about co-creating knowledge and building capacity that lasts.”

Four new faculty members join the School of Architecture and Planning (SA+P) this fall, offering the MIT community creativity, knowledge, and scholarship in multidisciplinary roles.

“These individuals add considerable strength and depth to our faculty,” says Hashim Sarkis, dean of the School of Architecture and Planning. “We are excited for the academic vigor they bring to research and teaching.”

Karrie G. Karahalios ’94, MEng ’95, SM ’97, PhD ’04 joins the MIT Media Lab as a full professor of media arts and sciences. Karahalios is a pioneer in the exploration of social media and of how people communicate in environments that are increasingly mediated by algorithms that, as she has written, “shape the world around us.” Her work combines computing, systems, artificial intelligence, anthropology, sociology, psychology, game theory, design, and infrastructure studies. Karahalios’ work has received numerous honors including the National Science Foundation CAREER Award, Alfred P. Sloan Research Fellowship, SIGMOD Best Paper Award, and recognition as an ACM Distinguished Member.

Pat Pataranutaporn SM ’18, PhD ’20 joins the MIT Media Lab as an assistant professor of media arts and sciences. A visionary technologist, scientist, and designer, Pataranutaporn explores the frontier of human-AI interaction, inventing and investigating AI systems that support human thriving. His research focuses on how personalized AI systems can amplify human cognition, from learning and decision-making to self-development, reflection, and well-being. Pataranutaporn will co-direct the Advancing Humans with AI Program.

Mariana Popescu joins the Department of Architecture as an assistant professor. Popescu is a computational architect and structural designer with a strong interest and experience in innovative ways of approaching the fabrication process and use of materials in construction. Her area of expertise is computational and parametric design, with a focus on digital fabrication and sustainable design. Her extensive involvement in projects related to promoting sustainability has led to a multilateral development of skills, which combine the fields of architecture, engineering, computational design, and digital fabrication. Popescu earned her doctorate at ETH Zurich. She was named a “Pioneer” on the MIT Technology Review global list of “35 innovators under 35” in 2019.

Holly Samuelson joins the Department of Architecture as an associate professor in the Building Technology Program at MIT, teaching architectural technology courses. Her teaching and research focus on issues of building design that impact human and environmental health. Her current projects harness advanced building simulation to investigate issues of greenhouse gas emissions, heat vulnerability, and indoor environmental quality while considering the future of buildings in a changing electricity grid. Samuelson has co-authored over 40 peer-reviewed papers, winning a best paper award from the journal Energy and Building. As a recognized expert in architectural technology, she has been featured in news outlets including The Washington Post, The Boston Globe, the BBC, and The Wall Street Journal. Samuelson earned her doctor of design from Harvard University Graduate School of Design.

Peter Temin PhD ’64, the MIT Elisha Gray II Professor of Economics, emeritus, passed away on Aug. 4. He was 87. 

Temin was a preeminent economic historian whose work spanned a remarkable range of topics, from the British Industrial Revolution and Roman economic history to the causes of the Great Depression and, later in his career, the decline of the American middle class. He also made important contributions to modernizing the field of economic history through his systematic use of economic theory and data analysis.

“Peter was a dedicated teacher and a wonderful colleague, who could bring economic history to life like few before or since,” says Jonathan Gruber, Ford Professor and chair of the Department of Economics. “As an undergraduate at MIT, I knew Peter as an engaging teacher and UROP [Undergraduate Research Opportunities Program] supervisor. Later, as a faculty member, I knew him as a steady and supportive colleague. A great person to talk to about everything, from research to politics to life at the Cape. Peter was the full package: a great scholar, a great teacher, and a dedicated public goods provider.”

When Temin began his career, the field of economic history was undergoing a reorientation within the profession. Led by giants like Paul Samuelson and Robert Solow, economics had become a more quantitative, mathematically rigorous discipline, and economic historians responded by embracing the new tools of economic theory and data collection. This “new economic history” (today also known as “cliometrics”) revolutionized the field by introducing statistical analysis and mathematical modeling to the study of the past. Temin was a pioneer of this new approach, using econometrics to reexamine key historical events and demonstrate how data analysis could lead to the overturning of long-held assumptions.

A prolific scholar who authored 17 books and edited six, Temin made important contributions to an incredibly diverse set of topics. “As kindly as he was brilliant, Peter was a unique type of academic,” says Harvard University Professor Claudia Goldin, a fellow economic historian and winner of the 2023 Nobel Prize in economic sciences. “He was a macroeconomist and an economic historian who later worked on today’s social problems. In between, he studied antitrust, health care, and the Roman economy.”

Temin’s earliest work focused on American industrial development during the 19th century and honed the signature approach that quickly made him a leading economic historian — combining rigorous economic theory with a deep understanding of historical context to reexamine the past. Temin was known for his extensive analysis of the Great Depression, which often challenged prevailing wisdom. By arguing that factors beyond monetary policy — including the gold standard and a decline in consumer spending — were critical drivers of the crisis, Temin helped recast how economists think about the catastrophe and the role of monetary policy in economic downturns.

As his career progressed, Temin’s work increasingly expanded to include the economic history of other regions and periods. His later work on the Great Depression placed a greater emphasis on the international context of the crisis, and he made significant contributions to our understanding of the drivers of the British Industrial Revolution and the nature of the Roman economy.

“Peter Temin was a giant in the field of economic history, with work touching every aspect of the field and original ideas backed by careful research,” says Daron Acemoglu, Institute Professor and recipient of the 2024 Nobel Prize in economics. “He challenged the modern view of the Industrial Revolution that emphasized technological changes in a few industries, pointing instead to a broader transformation of the British economy. He took on the famous historian of the ancient world, Moses Finley, arguing that slavery notwithstanding, markets in the Roman economy — especially land markets — worked. Peter’s influence and contributions have been long-lasting and will continue to be so.”

Temin was born in Philadelphia in 1937. His parents were activists who emphasized social responsibility, and his older brother, Howard, became a geneticist and virologist who shared the 1975 Nobel Prize in medicine. Temin received his BA from Swarthmore College in 1959 and went on to earn his PhD in Economics from MIT in 1964. He was a junior fellow of Harvard University’s Society of Fellows from 1962 to 1965.

Temin started his career as an assistant professor of industrial history at the MIT Sloan School of Management before being hired by the Department of Economics in 1967. He served as department chair from 1990t o 1993 and held the Elisha Gray II professorship from 1993 to 2009. Temin won a Guggenheim Fellowship in 2001, and served as president of the Economic History Association (1995-96) and the Eastern Economic Association (2001-02).

At MIT, Temin’s scholarly achievements were matched by a deep commitment to engaging students as a teacher and advisor. “As a researcher, Peter was able to zero in on the key questions around a topic and find answers where others had been flailing,” says Christina Romer, chair of the Council of Economic Advisers under President Obama and a former student and advisee. “As a teacher, he managed to draw sleepy students into a rousing discussion that made us think we had figured out the material on our own, when, in fact, he had been masterfully guiding us. And as a mentor, he was unfailingly supportive and generous with both his time and his vast knowledge of economic history. I feel blessed to have been one of his students.”

When he became the economics department head in 1990, Temin prioritized hiring newly-minted PhDs and other junior faculty. This foresight continues to pay dividends — his junior hires included Daron Acemoglu and Abhijit Banerjee, and he launched the recruiting of Bengt Holmström for a senior faculty position. All three went on to win Nobel Prizes and have been pillars of economics research and education at MIT.

Temin remained an active researcher and author after his retirement in 2009. Much of his later work turned toward the contemporary American economy and its deep-seated divisions. In his influential 2017 book, “The Vanishing Middle Class: Prejudice and Power in a Dual Economy,” he argued that the United States had become a “dual economy,” with a prosperous finance, technology, and electronics sector on one hand and, on the other, a low-wage sector characterized by stagnant opportunity.

“There are echoes of Temin’s later writings in current department initiatives, such as the Stone Center on Inequality and Shaping the Future of Work” notes Gruber. “Temin was in many ways ahead of the curve in treating inequality as an issue of central importance for our discipline.”

In “The Vanishing Middle Class,” Temin also explored the role that historical events, particularly the legacy of slavery and its aftermath, played in creating and perpetuating economic divides. He further explored these themes in his last book, “Never Together: The Economic History of a Segregated America,” published in 2022. While Temin was perhaps best known for his work applying modern economic tools to the past, this later work showed that he was no less adept at the inverse: using historical analysis to shed light on modern economic problems.

Temin was active with MIT Hillel throughout his career, and outside the Institute, he enjoyed staying active. He could often be seen walking or biking to MIT, and taking a walk around Jamaica Pond was a favorite activity in his last few months of life. Peter and his late wife Charlotte were also avid travelers and art collectors. He was a wonderful husband, father, and grandfather, who was deeply devoted to his family.

Temin is lovingly remembered by his daughter Elizabeth “Liz” Temin and three grandsons, Colin and Zachary Gibbons and Elijah Mendez. He was preceded in death by his wife, Charlotte Temin, a psychologist and educator, and his daughter, Melanie Temin Mendez.

By reducing its reserves, the Texas Windstorm Insurance Association can keep prices steady for policyholders on the coast. But it may struggle to pay claims.