Two macro economists are taking a walk in the park. They come across a pile of dog shit and one says to the other ”I’ll give you $500 if you eat that.” To his s

Two macro economists are taking a walk in the park. They come across a pile of dog shit and one says to the other ”I’ll give you $500 if you eat that.” To his surprise, the other complies. The money is handed over. After a while more, they come across another turd. The dare is repeated, the other way around. One says to the other, ”you know I can’t help but feel like the only thing we got out of these transactions is that we’ve both eaten dog shit.” The other shakes his head and replies ”The GDP has gone up by $1000.”