Economists love their supply demand graph. This article is saying the graph isn't enough. This seems obvious on its face, reminds me a friction in physics, whe

Economists love their supply demand graph. This article is saying the graph isn't enough. This seems obvious on its face, reminds me a friction in physics, where you can ignore it until you cannot. But physics is not incapable of measuring the friction. The concern is if economists able to account their model's friction.