>When the proportion of meatless options doubled from one to two of four choices, overall sales remained about constant. But sales of meat-containing meals dropped, and sales of vegetarian meals, such as “wild mushroom, roasted butternut squash and sun blushed tomato risotto with parmesan”, rose 40–80%. So they cut the available meat options and doubled the available vegetarian options and find it surprising they sol…
I don’t think it’s as obvious as you imply. If a menu goes from 80% meat to 20% meat, I wouldn’t have been surprised to learn that either the same proportion of customers still chose a meat option; or that fewer customers ordered anything to begin with
Similarly, this is about cafeterias. Sometimes food runs out. Hell, the meat option always runs out on airplanes until food gets to me. If they reduce the meat even more, no wonder that more people will eat vegetarian dishes. There's no meat left.