两个经济学的学生走在路上，看到路边有一坨屎，A对B说：你把这坨屎吃了，我就给你5000万。为了钱B就毫不犹豫的吃了这坨屎，A爽快给了B一张 5000万的支票。
他们继续走着，但是心里却都有了一个疙瘩。A心想，他吃一坨屎，我就给了他5000万，真不值。B心里想，我吃了一坨屎，才拿到5000万，真不值。
突然，在路边又出现一坨屎。于是B报复A说道：你把这坨屎吃了，我就还你5000万。见到弥补损失的机会，于是A也毫不犹豫的吃了屎。
但是两个人回过头来想想，就觉得不对：什么都没得到，却一人吃了一坨屎。于是把这件事告诉了他们的经济学导师。
导师激动的喊道：天哪！知道吗？你们刚才做 了什么！
两个学生一脸后悔地说：我们一人吃了一坨屎。
导师立即打断他们的话：不！一眨眼功夫，你们就创造了一个亿的GDP，奇迹啊！这个经验推广全国，实现小康还会远吗！
不久，权威机构宣称我国已基本实现小康。这位经济学教授也顺利进入国家院士之列。
Two students studying economics, walking on a road, saw a piece of shit. Student A said to Student B, “if you eat this piece of shit, I will pay you 50 million Yuan.” Ok---B ate the shit with no hesitation at all---So A immediately paid to B 50-million a check.
They kept walking, but an odd issue came to them. A thought,” as he ate a piece of shit, I had to give him 50million Yuan, not really worth it. ” At same time, B was yet thinking,” I ate a piece of shit, only getting 50 million, not really worth it.”
Out of blue, another piece of shit occurred sidewalk. Then B said to A with a revenge mind, “if you eat the shit, I will return back your 50 million.” A saw an opportunity to offset his loss and therefore ate it without any hesitating.
When the two, however, thought of the whole thing, they felt something was wrong---They did not get any, but each eating one shit. So they went to their economic-teaching professor and told him the event.
The professor yelled, after listening to them, “My god! Do you guys know? What did you just do! ”
Being regrettable, the two answered, “We each ate one shit. “
The professor interrupted them, “No, with the blink of an eye, you generated a 100- million GDP—what a miracle! As we propagate this technique in whole country, our country will be growing richer. “
No long later, the relevant authority announced that the country has almost reached to a middle-class level. And this professor became a member of National Academy of economics accordingly.