https://en.wikipedia.org/wiki/It's_the_economy,_stupid

**It's the economy, stupid! 笨蛋，問題出在經濟！**

https://www.graphicnews.com/en/pages/23706/economy-g20-member-nations/related

https://flowingdata.com/2009/03/13/27-visualizations-and-infographics-to-understand-the-financial-crisis/

EOS introductory: 策略與經濟原則：利潤、彈性、成本（可避免成本、沈沒成本）、Fims’ N, 賽局

EOS introductory: 策略與經濟原則：利潤、彈性、成本（可避免成本、沈沒成本）、Fims’ N, 賽局

需求彈性、價格彈性

邊際成本、平均成本

https://www.youtube.com/watch?v=HSeCnJilV8w

https://medium.com/@mingruge42/如何計算一個產品的總生產成本-a6ecf2f31504