Modeling complex systems: A case study of compartmental models in epidemiology with PK Kollepara, Alex Siegenfeld We "show how assumptions can constrain model outcomes to a narrow portion of the wide landscape of potential epidemic behaviors" 1/ arxiv.org/abs/2110.02947

“While critique is certainly an important part of improving scientific fields, we do not want to set a precedent or encourage submission of articles that only critique the methods used by others.” statmodeling.stat.columbia.edu/2021/10/30/whi…

ML models are being deployed in mission-critical settings, such as autonomous vehicles. Shockingly, the data used to train these models are rarely checked! The Lyft Level 5 dataset has errors in 70% of the validation scenes, see our blog post: dawn.cs.stanford.edu/2022/01/24/loa/ (1/5)

In a recent profile, MIT senior Sihao Huang talks about working with MIT Center for Constructive Communication PhD student Alex Siegenfeld towards the emerging field of complex systems science—which uses insights + tools from engineering + physics to understand social systems. news.mit.edu/2022/modeling-…

New research from Hertz Fellow & Massachusetts Institute of Technology (MIT) PhD student Alex Siegenfeld explains why the effectiveness of surgical #masks in preventing respiratory infections has been underestimated. thetyee.ca/News/2022/02/0…

The exact wording in polls, surveys and psychology studies matters more than most people seem to realize. This is a big deal if you want to learn from polls and academic papers, or if you conduct studies yourself. Here are some dramatic real examples:

“Masks block some fraction of viral particles from dispersing from those who are infected and from infecting those who are susceptible . . . studies that did not find masks to be effective had limited statistical power and therefore do not imply that m statmodeling.stat.columbia.edu/2022/02/24/mas…

Since the Bucha massacre was made public, Germany has paid ~$1.5B in gas to Russia Yet 🇩🇪 will still close its nuclear power plants in 2022. Why? I dug up the details. Not pretty. The only conclusion is that 🇩🇪 would rather kill nuclear than fight Putin & defend Ukraine 1/

Statistics and science reform: My conversation with economist Noah Smith statmodeling.stat.columbia.edu/2022/06/14/sta…

Preprint with Alex Siegenfeld and Andrew Gelman et al. - How Democracies Polarize: A Multilevel Perspective Almost all democracies employ elections at various scale, but how do the nested elections interact with heterogenous political geographies? 🧵 arxiv.org/abs/2211.01249 1/

I'm excited to announce our library zkml for trustless machine learning! After months of hard work, we've supercharged its performance & expanded its capabilities. Now, zkml achieves 92% accuracy on ImageNet! Blog post: medium.com/@danieldkang/f… GitHub: github.com/ddkang/zkml 1/

My paper with Yaneer Bar-Yam featured on the cover of Entropy