Stories worth investing in: energy-hungry Ai, measuring inflation, and what caused the 1929 stock market crash

Links for weekend reading: a petition supporting local energy prices, open plan offices and bad moods, and H5N1 on the loose

Programming note: There will be a short, one-week break from Friday, November 29th, to Friday, December 6th, inclusive. I'm away on business - the letters will take a breather for a few days.

Also, thank you for the wave of renewals over the last month. It's very much appreciated.

To those who haven’t renewed or are thinking about starting a subscription,…