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Four Robert Summers Fellowships Awarded

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The NBER has awarded four Robert Summers fellowships that enable economic statisticians to attend the Conference on Research in Income and Wealth (CRIW) meeting on July 20–21, 2026, in Cambridge, MA. Founded in 1936 by Simon Kuznets, the CRIW provides a forum for academics, government representatives, and business economists to present and discuss the latest research in this area. The fellows will participate in the meeting, which is part of the NBER Summer Institute, and have an opportunity to interact with leading scholars and practitioners in the field of economic measurement. 

The…

A research summary from the monthly NBER Digest

Multimodal Freight Transport figure

Multimodal Freight Transport

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Over half of US freight, measured in ton-miles, moves using more than one transport mode. Roughly two-thirds of shipments traveling over 500 miles rely on combinations of road, rail, and waterway networks connected by ports and inland terminals. Recent disruptions—from pandemic-era port congestion to the Panama Canal drought and threatened rail strikes—have shown how problems at local bottlenecks can ripple through this multimodal system, raising transport costs and affecting supply chains nationwide.

In Multimodal Transport Networks (NBER Working Paper 35065), Simon Fuchs and Woan Foong Wong develop a…

From the NBER Reporter: Research, program, and conference summaries

Program Report: Economics of Education figure

Program Report: Economics of Education

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The NBER Economics of Education Program covers topics related to education in a manner that is deeply informed by economic logic and empirical methods. The program draws upon theory from several fields including public, labor, development, and urban economics, as well as industrial organization. The program has 179 members and meets three times a year in Cambridge, Chicago, Stanford, and Washington. The average meeting attracts about 100 submissions for a program of about 10 papers. The program has a culture that combines rigor, constructive advice, and noteworthy collegiality.

Top North American universities are very well represented, but the Economics of Education draws participants from many states, countries, universities, and organizations. While the papers often analyze high-income countries’ policies, most of the…

From the NBER Bulletin on Health

How Inspection Timing Affects Care Quality in US Nursing Homes

How Inspection Timing Affects Care Quality in US Nursing Homes

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Nursing homes certified by the Centers for Medicare & Medicaid Services to provide care and receive public reimbursement through Medicare and Medicaid are subject to mandatory annual inspections. While inspections are unannounced, they typically occur on an approximately yearly basis, as 74 percent of inspections take place between 40 and 60 weeks after the previous one. The average gap is around 53 weeks. Due to the cyclical nature of inspections, nursing home operators are able to anticipate when an inspection is likely and adjust their behavior accordingly. They appear to devote more effort to patient care when inspections are approaching.

In Predictably Unpredictable Inspections (NBER Working Paper 34491), Ashvin GandhiAndrew Olenski, and Maggie Shi study how the predictability of nursing home inspections shapes facility effort and patient...

From the NBER Bulletin on Entrepreneurship

Mixed Immigrant-Native Founding Teams Excel Figure

Mixed Immigrant-Native Founding Teams Excel

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Roughly one-quarter of new employer businesses in the United States are started by immigrants. Immigrant inventors have been responsible for approximately 23 percent of US patents produced since 1976 despite making up only 16 percent of the total US-based inventor population. Yet immigrant entrepreneurs usually do not build companies in isolation—many cofound startups alongside US-born entrepreneurs. In Native-Immigrant Entrepreneurial Synergies (NBER Working Paper 33804), Zhao JinAmir Kermani, and Timothy McQuade examine whether startups cofounded by immigrant and native entrepreneurs outperform those with founders from exclusively one...

Featured Working Papers

Chuck FangItay Goldstein, and Yao Zeng study semi-liquid private credit funds that together manage over $300 billion in assets and find that even though these funds cap investor withdrawals at 5 percent per quarter, they still cannot cover repeated quarters of limit redemptions with cash and loan income alone. This means they must sell illiquid loans and take on more debt, which in turn makes remaining investors more likely to withdraw their money.

Among Medicare-Medicaid dual eligible beneficiaries, state Medicaid programs that cover routine eye exams and eyeglasses increase eye exams by 6.4 percentage points (13 percent) and eyeglasses purchases by 5.9 percentage points (32 percent), while boosting Medicaid spending on eyeglasses and reducing out-of-pocket costs, according to Michel H. BoudreauxBrandy Lipton, and Melissa McInerney.

Peter HuybersMarco TabelliniCharles A. Taylor, and Francesco Toti study migration flows spanning Western Eurasia over the past 10,000 years and find that farmers migrated toward destinations with similar temperature and soil while pastoralists moved toward destinations with similar rainfall.

Researchers Mahta Ghafarianghadim and Garth Heutel, using data from the state of Georgia, suggest that a 1 µg/m³ increase in weekly PM2.5 concentration reduces preschool-aged children's childcare attendance by about 2.5 percentage points, with larger effects among Black and Hispanic children and those with working caregivers.

Analysis of detailed regional data suggests that exposure to the 1970 Bhola cyclone in East Pakistan pushed voters toward the separatist Awami League and boosted support for the guerrilla insurgency that led to Bangladesh's independence, according to Sultan Mehmood and Ahmed Mushfiq. 

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