Systems Eng Prof @ GWU 🦛 | Director, Data Analytics MS Program | EVs 🔋🚗 | Low Carbon Tech | Choice Modeling | Survey Research | China | US-China Policy | #rstats | #reproducibility | #opensource | Father | opinions own https://bsky.app/profile/jhelvy.bsky.socialhttps://bsky.app/profile/jhelvy.bsky.social/post/3mjdaz6chf22zYou're next Donny https://www.nytimes.com/2026/04/12/world/europe/hungary-election-orban-magyar.html https://www.nytimes.com/2026/04/12/world/europe/hungary-election-orban-magyar.html?campaign_id=60&emc=edit_na_20260412&instance_id=173966&nl=breaking-news&regi_id=219454601&segment_id=218120&user_id=b2307709aa6fbf99ff4972ed10a273b712 Apr 2026 21:06 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mjdaz6chf22zhttps://bsky.app/profile/jhelvy.bsky.social/post/3mj56jdb6b225@pingfanhu.bsky.social has an amazing 3-part blog series on agentic engineering workflows: Part 1 - Claude code basics: https://pingfanhu.com/blog/2026-03-26-agentic-engineering-1/ Part 2 - Workflow and examples: https://pingfanhu.com/blog/2026-04-06-agentic-engineering-2/ Part 3 - Software that ties it together: https://pingfanhu.com/blog/2026-04-09-agentic-engineering-3/10 Apr 2026 11:06 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mj56jdb6b225https://bsky.app/profile/jhelvy.bsky.social/post/3mj34tk5wrk2nAt its peak, the US had over half a million soldiers deployed to Vietnam, with a total of 2.7 million served over the course of the war, and US forces still failed to secure the country09 Apr 2026 15:30 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mj34tk5wrk2nhttps://bsky.app/profile/jhelvy.bsky.social/post/3miix7kwuys2lThis is monumental...the entire open source world now has access to a #python version of Claude code, with a #rust port coming soon. This is the fastest repo in history to surpass 100k stars. Absolutely wild that the most powerful AI coding agent is now just out there. https://github.com/ultraworkers/claw-code02 Apr 2026 10:02 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3miix7kwuys2lhttps://bsky.app/profile/jhelvy.bsky.social/post/3mi5rqbn3ec2oOof...damning evidence of AI responses on online surveys. The battle against AI survey bots is well underway, and it doesn't look like the humans are winning https://www.theguardian.com/technology/2026/mar/28/how-fraudulent-church-data-revealed-ais-threat-to-polling28 Mar 2026 23:24 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mi5rqbn3ec2ohttps://bsky.app/profile/jhelvy.bsky.social/post/3mhnetthmik2lThe very best stats course you can get is still free. Absolutely amazing stuff. [contains quote post or other embedded content]22 Mar 2026 10:51 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mhnetthmik2lhttps://bsky.app/profile/jhelvy.bsky.social/post/3mh6iz7yzbs2z@jigarshahdc.bsky.social on point👇 [contains quote post or other embedded content]16 Mar 2026 12:56 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mh6iz7yzbs2zhttps://bsky.app/profile/jhelvy.bsky.social/post/3mgs6zi5vlc22If you think that's cool, wait til yoy see my market research tech [contains quote post or other embedded content]11 Mar 2026 15:25 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mgs6zi5vlc22https://bsky.app/profile/jhelvy.bsky.social/post/3mgn5onzkuk2lHas there ever been a time when the strategy of "if we just keep bombing civilians eventually they'll finally rise up to overthrow their oppressive government" ever worked?09 Mar 2026 15:18 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mgn5onzkuk2lhttps://bsky.app/profile/jhelvy.bsky.social/post/3mg7zk7scd222Someone ported Karpathy's microGPT to pure #julialang in 99 lines with 0 dependencies, it's 1600x faster than CPython... hard to emphasize enough how impressive this is https://www.reddit.com/r/Julia/s/VggUYfIGok04 Mar 2026 09:59 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mg7zk7scd222https://bsky.app/profile/jhelvy.bsky.social/post/3mfzqlhdcgc2z@simonwillison.net is the first I've heard use the term "agentic engineering", which feels like a much better description of how I use tools like Claude Code (as opposed to "vibe coding", which implies no human architecting the result). Great stuff in this post: https://simonwillison.net/2026/Feb/23/agentic-engineering-patterns/01 Mar 2026 22:03 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mfzqlhdcgc2zhttps://bsky.app/profile/jhelvy.bsky.social/post/3mftokd7gy22tSharing a new #opensource project we've been building: vehicletrends.us — an interactive dashboard tracking U.S. automotive market trends from millions of listings. Data is available via the {vehicletrends} #rstats package. Site made with #Quarto, code at github.com/vehicletrends 🚗 📊27 Feb 2026 12:10 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mftokd7gy22thttps://bsky.app/profile/jhelvy.bsky.social/post/3mfrdoqnqlc2gCheck out this wide-ranging discussion I had with Frank Sesno, director of the Alliance for a Sustainable Future at GWU. Topics include EV competition, US-based EV production, facing the challenge of Chinese EV leadership, and national security (among other things). https://www.youtube.com/watch?v=oUMzgm7P8Qc26 Feb 2026 13:51 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mfrdoqnqlc2ghttps://bsky.app/profile/jhelvy.bsky.social/post/3mfouosdq7k26We live in a magical time for #dataviz. This map is just a static html page served on GitHub pages 🤯 It uses the incredible {pmtiles} #rstats package by @kylewalker.bsky.social to quickly filter through ~21M rows of data hosted on Cloudflare vehicletrends.github.io/hhi-map/25 Feb 2026 14:17 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mfouosdq7k26https://bsky.app/profile/jhelvy.bsky.social/post/3mf7gaechec2nSo jealous of S. Korea https://www.bloomberg.com/news/articles/2026-02-19/ousted-korean-president-yoon-sentenced-to-life-over-martial-law?embedded-checkout=true19 Feb 2026 10:48 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mf7gaechec2nhttps://bsky.app/profile/jhelvy.bsky.social/post/3mdva2irfl22iThere I fixed it [contains quote post or other embedded content]02 Feb 2026 16:06 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mdva2irfl22ihttps://bsky.app/profile/jhelvy.bsky.social/post/3mdv6gouvv22hI teach my students to always start the y-axis at 0 when making a bar chart for a reason https://x.com/WhiteHouse/status/201737099243624902502 Feb 2026 15:37 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mdv6gouvv22hhttps://bsky.app/profile/jhelvy.bsky.social/post/3mdi77rrxfs2zIncredible self own for the US. The damage being done to the US scientific enterprise is generational. We will look back on this as a tipping point where the US chose all on its own to stop leading the world in science. https://www.science.org/content/article/u-s-government-has-lost-more-10-000-stem-ph-d-s-trump-took-office28 Jan 2026 11:46 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mdi77rrxfs2zhttps://bsky.app/profile/jhelvy.bsky.social/post/3mdatnyeg6s26Now channel your inner Mitch McConnell and stick to it https://www.nytimes.com/2026/01/24/us/democrats-congress-reaction.html [contains quote post or other embedded content]25 Jan 2026 13:31 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mdatnyeg6s26https://bsky.app/profile/jhelvy.bsky.social/post/3md6zquy7rs2dDefund ICE or shut the government down. This is the moderate position.24 Jan 2026 20:15 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3md6zquy7rs2dhttps://bsky.app/profile/jhelvy.bsky.social/post/3mcvk36frek2dPeople are holding on to hope with "but the Generals wouldn't obey that order right?" and 1) that says a LOT about where we are right now and 2) you better believe they 100% would follow that order, and if not there are hundreds in line who would I mean look at who they put in charge of DoD ffs21 Jan 2026 01:40 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mcvk36frek2dhttps://bsky.app/profile/jhelvy.bsky.social/post/3mcrmlpye7k2pFor the record, as an American, I think threatening tariffs on our closest European allies and fellow NATO members because they are standing up to US threats to forcibly annex Greenland is bad.19 Jan 2026 12:14 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mcrmlpye7k2phttps://bsky.app/profile/jhelvy.bsky.social/post/3mcqinueld224Most Americans have no idea how immensely pissed Canadians are at the US. I'm not Canadian, but have family there, and the damage from the US's betrayal will last a generation or more. There's no returning to the prior relationship regardless who takes power in the US. [contains quote post or other embedded content]19 Jan 2026 01:31 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mcqinueld224https://bsky.app/profile/jhelvy.bsky.social/post/3mcketw76ac2mIt begins. Canadians will soon experience the vast superiority of Chinese EVs, and the US will lose its largest vehicle export market. The transition will happen much faster than people think. [contains quote post or other embedded content]16 Jan 2026 15:07 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mcketw76ac2mhttps://bsky.app/profile/jhelvy.bsky.social/post/3mchuqupurk25Updated my LLM / AI policy for my intro to #Rstats programming course this semester: https://p4a.seas.gwu.edu/2026-Spring/syllabus.html#use-of-chatgpt-and-other-ai-tools Largely inspired by @andrew.heiss.phd post: lnkd.in/e_Sr2D-515 Jan 2026 15:14 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mchuqupurk25https://bsky.app/profile/jhelvy.bsky.social/post/3mcbcv5anls2dIt's a DS workshop by @andrew.heiss.phd, what more do you need to know? You should check it out #rstats #positron [contains quote post or other embedded content]13 Jan 2026 00:38 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mcbcv5anls2dhttps://bsky.app/profile/jhelvy.bsky.social/post/3mcb44gdf2k23🤌 [contains quote post or other embedded content]12 Jan 2026 22:37 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mcb44gdf2k23https://bsky.app/profile/jhelvy.bsky.social/post/3mc3dbcmll22wIt's all too obvious why any regime as unpopular as the current one would work so hard to silence public data infrastructure https://www.bloomberg.com/news/articles/2026-01-09/why-the-trump-administration-is-choosing-not-to-collect-some-us-data?accessToken=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzb3VyY2UiOiJTdWJzY3JpYmVyR2lmdGVkQXJ0aWNsZSIsImlhdCI6MTc2ODA1ODE1OCwiZXhwIjoxNzY4NjYyOTU4LCJhcnRpY2xlSWQiOiJUOExENEhLSUpIOTUwMCIsImJjb25uZWN0SWQiOiJEMUQ4QjZFOTk1QzI0M0VDOTQwMURGMTY3MkFDQ0E0MyJ9.5l6-YwkNPy1AlJdNn3qX-IaWNYg6iN-uIuVibEvmCC8&leadSource=uverify%20wall10 Jan 2026 15:29 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mc3dbcmll22whttps://bsky.app/profile/jhelvy.bsky.social/post/3mbyi6af5pk2jTwo more shot. Shut it down until the lawlessness ends. https://www.nytimes.com/2026/01/08/us/politics/federal-agents-shooting-portland.html?campaign_id=9&emc=edit_nn_20260109&instance_id=169035&nl=the-morning&regi_id=219454601&segment_id=213407&user_id=b2307709aa6fbf99ff4972ed10a273b709 Jan 2026 12:19 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mbyi6af5pk2jhttps://bsky.app/profile/jhelvy.bsky.social/post/3mbv6qe35ns2sI swear to God if the shoe were in the other foot there is NO WAY the Rs would have let this obscene level of lawlessness go on. The Ds need to grow a pair and start pulling from the old Mitch McConnell playbook. [contains quote post or other embedded content]08 Jan 2026 04:52 +0000at://did:plc:2ei6s4tl5nqd2eo7j2drkhoz/app.bsky.feed.post/3mbv6qe35ns2s