Listen now | By Walt Hickey Welcome to the Numlock Sunday edition. This week I spoke to Alison Griswold, who just restarted one of my favorite newsletters, Oversharing, which is all about companies in the sharing economy. Since pausing the newsletter, Griswold went to grad school with a concentration on sustainable cities, and is coming back with a renewed interest in the ways that tech companies are interacting, improving and undermining different cities. We spoke all about what’s changed, and how the sharing economy has an effect on the world.