A couple days ago Kevin posted a graph showing price changes over time: one line was for cat food, the other dog food. He asked his readers (cat fans, I assume, because of his Friday feature) which was which, specifically which had had the greater increase in recent years..
The "best" comment threads uniformly guessed cat food, offering good and valid reasons (cats eat meat, dogs eat more varied diets).
The answer, however, was dog food had increased; cat food is actually cheaper today than it was in 1985.
I have no idea why the difference. Possibly we underestimate the changes in the price of meat over the last 30 years? Or possibly something else.
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