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Rolf Pendall

@rpplan.bsky.social
506 followers 263 following 84 posts

I'm an urban planning educator at the University of Illinois, Urbana-Champaign. My questions/quests: Can zoning make communities equitable instead of protecting privilege? What narratives & political campaigns can lead to zoning for equity?

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Rolf Pendall @rpplan.bsky.social · 30/05/2025
LLMs suck at lit review, and they're getting worse at it. Transparently obvious from today's news (HHS's nonsense MAHA report!) and backed with recently published peer-reviewed research by Peters & Chin-Yee: doi.org/10.1098/rsos...
Screen grab of article title and authors, "Generalization bias in large language model summarization of scientific research," Uwe Peters and Benjamin Chin-YeeAbstract: "Artificial intelligence chatbots driven by large language
models (LLMs) have the potential to increase public science
literacy and support scientific research, as they can quickly
summarize complex scientific information in accessible terms.
However, when summarizing scientific texts, LLMs may
omit details that limit the scope of research conclusions,
leading to generalizations of results broader than warranted
by the original study. We tested 10 prominent LLMs,
including ChatGPT-4o, ChatGPT-4.5, DeepSeek, LLaMA 3.3
70B, and Claude 3.7 Sonnet, comparing 4900 LLM-generated
summaries to their original scientific texts. Even when
explicitly prompted for accuracy, most LLMs produced
broader generalizations of scientific results than those in
the original texts, with DeepSeek, ChatGPT-4o, and LLaMA
3.3 70B overgeneralizing in 26–73% of cases. In a direct
comparison of LLM-generated and human-authored science
summaries, LLM summaries were nearly five times more
likely to contain broad generalizations (odds ratio = 4.85,
95% CI [3.06, 7.70], p < 0.001). Notably, newer models tended
to perform worse in generalization accuracy than earlier
ones. Our results indicate a strong bias in many widely
used LLMs towards overgeneralizing scientific conclusions,
posing a significant risk of large-scale misinterpretations
of research findings. We highlight potential mitigation
strategies, including lowering LLM temperature settings and
benchmarking LLMs for generalization accuracy."
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Rolf Pendall @rpplan.bsky.social · 23/05/2025
1/ Property taxes are the best value-capture mechanism, per Aurora Echevarria & @elpaavo.bsky.social based on intensive study of Mexico City. Excellent summary of their arguments on @urbanaffairsreview.bsky.social blog: www.urbanaffairsreview.com/uar-archive/...
urbanaffairsreview.com
Challenges to Equitable and Effective Land Value Capture: Lessons from Mexico City — Urban Affairs Review
Scholars and practitioners argue that local governments should capture rising land values to fund services and infrastructure, especially when the value results from public and collective action. Yet ...
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Heather Hurlburt @natsecheather.bsky.social · 04/04/2025
I promised my friend @rpplan.bsky.social that I would activate my account here to share my thoughts about the larger economic, political and global aspirations behind the tariffs, written for @chathamhouse.org www.chathamhouse.org/2025/04/trum...
chathamhouse.org
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Rolf Pendall @rpplan.bsky.social · 17/03/2025
Interesting reading. What implications for housing policy? Households are aging and shrinking but it’s expensive to adapt the stock. Would it be cost-effective to socialize costs of retrofits for energy efficiency, health, & safety?
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Yonah Freemark @yonahfreemark.com · 13/03/2025
New data tool launch today 🚨 @urbaninstitute.bsky.social's Federal Infrastructure site. It includes detailed information on funds from 110 programs across all states, counties & metro areas. Tool pinpoints the support that communities receive for transportation, housing, energy, water & broadband.
apps.urban.org
Are Federal Infrastructure Dollars Meeting Your Community’s Needs?
Data analysis tracking whether the billions in funding that the US has committed to its roads, bridges, housing, and other infrastructure are getting to the communities that need it most.
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Ida Bae Wells @nhannahjones.bsky.social · 11/03/2025
Please, please, if you report on this: the mandate to affirmatively further fair housing is literally codified in the Fair Housing Act of 1968 and neither Trump nor HUD can “repeal” this law. The rule defined how to enforce the law, but the law and obligation remain. www.yahoo.com/news/hud-sec...
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Rolf Pendall @rpplan.bsky.social · 10/03/2025
I'm seeing an uptick in the anti-inclusionary zoning narrative from an econ 101 standpoint, which assumes a questionable counterfactual (upzoning could occur without IZ). In many places, IZ is the political cost of upzoning.
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Rolf Pendall @rpplan.bsky.social · 02/02/2025
Insights from @timothysnyder.bsky.social about the ongoing coup and how patriots (i.e., those who believe in the rule of law) can counter it. The Logic of Destruction open.substack.com/pub/snyder/p...
open.substack.com
The Logic of Destruction
And how to resist it
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Rolf Pendall @rpplan.bsky.social · 28/01/2025
Whom would you choose as the Dems’ shadow Secretaries of HUD, DOT, EPA, USDA, Treasury, HHS, Education, or any other agency? @timothysnyder.bsky.social has a good summary of this brilliant idea here: snyder.substack.com/p/shadow-cab...
snyder.substack.com
Shadow Cabinet
A Positive Form of Opposition
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Rolf Pendall @rpplan.bsky.social · 19/01/2025
What drivers get | What walkers get, Champaign “in-town” edition, I.e., the area that’s supposed to be pedestrian-friendly
A wide street plowed and salted ready for 40mph in a 30mph zone that should be 20mphAn icy slushy sidewalk with ample evidence of frequent pedestrian traffic
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Rolf Pendall @rpplan.bsky.social · 17/01/2025
Excellent recap by @sara-mctarnaghan.bsky.social on Treasury’s analysis of homeowner insurance: harder to get and more expensive.
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Rolf Pendall @rpplan.bsky.social · 18/12/2024
This morning I overheard my doctor scoffing outside the closed exam room door about UnitedHealthcare listing its CEO job opening within 12 hours of the event. He was repeating misinformation but still. Our docs are fed up w private health insurance—why not the AMA?
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Rolf Pendall @rpplan.bsky.social · 17/12/2024
Smart perspective from John Landis on causes of housing shortages + practical solutions. It isn’t just zoning; in a lot of places, it’s not about zoning at all. www-planetizen-com.cdn.ampproject.org/c/s/www.plan...
www-planetizen-com.cdn.ampproject.org
To Build More Housing, Cities Must Be Smarter in How They Use Land
How strategic land use policy decisions can alleviate the housing crisis and limit unsustainable sprawl.
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Rolf Pendall @rpplan.bsky.social · 17/12/2024
Amid a scalding heat wave, parts of South Australia exceeded 45°C (113°F) Monday. It met 96% of power demand with renewables. Result: energy prices remained below zero. reneweconomy.com.au/wind-and-sol...
reneweconomy.com.au
Wind and solar smash output records as grid demand hits new highs in midst of heatwave
Updated: South Australia smashes demand record, but prices remain negative because wind and solar supplied nearly all its power needs, as main grid also hits new peaks in heatwave.
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Rolf Pendall @rpplan.bsky.social · 16/12/2024
Check out the whole thread. Excellent work—thank you!!from post 6: “the median renter making less than $30,000 has just $250 left, a 55% drop (inflation-adjusted) since 2001. burdened lower-income renters spend less on basic necessities, threatening their well-being and housing stability.”
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Rolf Pendall @rpplan.bsky.social · 21/11/2024
Valuable critique by @sara-mctarnaghan.bsky.social of efforts to measure resilience
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Rolf Pendall @rpplan.bsky.social · 20/11/2024
I learned so much just now about Chapter 40B (MA's "anti-NIMBY" law) from a new article by Noémie Sportiche and colleages in @houspoldebate.bsky.social. 40B has created tens of thousands of units in "high-opportunity" neighborhoods. doi.org/10.1080/1051...
doi.org
Can Fair Share Policies Expand Neighborhood Choice? Evidence From Bypassing Exclusionary Zoning Under Massachusetts Chapter 40B
Opening up neighborhoods that offer greater opportunities for social mobility to low- and moderate-income households remains a challenge in the United States. Exclusionary zoning practices act as a...
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Rolf Pendall @rpplan.bsky.social · 18/11/2024
My first Bluesky post. It’s daunting to start on a new platform. Whom do I imagine as the community(ies) I’ll most want to be part of here? I.e., who do I want to be here? Early followers: why did you follow me (back)? What can I offer that you think few others can? Thanks.
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Rolf Pendall @rpplan.bsky.social · 19/11/2024
Unintended consequences of well-meaning policies: using rent payments to boost credit scores can hurt long-term renters more than it helps would-be homebuyers. Thanks @corpkiller.bsky.social for the insight.
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Rolf Pendall @rpplan.bsky.social · 18/11/2024
My first Bluesky post. It’s daunting to start on a new platform. Whom do I imagine as the community(ies) I’ll most want to be part of here? I.e., who do I want to be here? Early followers: why did you follow me (back)? What can I offer that you think few others can? Thanks.
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