HeyJaredBy the Numbers
Using data and research to understand what really makes a difference
- Indexed issues, last 90 days
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- Sep 14, 2026
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- Jul 21, 2026
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US Energy Data: a new platform to explore American energy, state-by-state (opens the original)
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I’ve spent the last decade working with and advocating for open and accessible data. It’s not enough to just collect the data, and put it online in a spreadsheet (although this data collection work is absolutely crucial, and underrated).For people — policymakers, journalists, the general public — to make use of it, you need to make it easy to use. That’s what we try to do at Our World in Data, across a huge number of topics.Over the last six months, I’ve been trying to do the same, specifically
Young people tend to be happier than older generations, but not in the Anglosphere (opens the original)
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For a long time, the “U-shaped curve” has been a dominant framework in the research on happiness. As the theory goes, happiness scores tend to follow a U-shape with age: people are happiest when they’re young, become less so into middle-age, and things pick up again in their later years.This was often presented as a universal pattern across countries. This theory has always had its critics, but even the researchers who coined it have begun to question whether the U has disappeared over the last
Forget more reservoirs; should the UK just build desalination plants instead? (opens the original)
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A few weeks ago, I wrote an article about why the UK needs to get its act together and build some new reservoirs. It hasn’t built one in my lifetime — despite adding 10 million people — and the mismatch between winter and summer rain is probably going to get worse.<a class="image-link image2 is-viewable-img" href="https://substackcdn.com/image/fetch/$s_!GZqf!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2
The UK needs to build more reservoirs (opens the original)
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The UK has had an extremely dry summer. Look at photos online, and you’ll see the traditionally green parks looking like hay.Just how dry have things been?Look at data since the 1800s, and rainfall in England in July was the lowest on record, by a long way. You can see this in the bottom panel of the chart below.The <a href="https://www.metoffic
Tracking global food production through a record El Niño (opens the original)
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This summer has been a hot one for many countries. With an extremely strong (and potentially record-breaking) El Niño on the way, next year is likely to be even hotter. If you’re interested, Zeke Hausfather at the Climate Brink has a very good article on how that is developing.Two of my biggest concerns when it comes to climate change are the direct impacts of e
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