我們正在經歷一場財富幻覺 勒緊褲腰帶過日子吧！

https://www.youtube.com/watch?v=PAN6V_MEpLY

https://wiki.mbalib.com/wiki/%E6%81%A9%E6%A0%BC%E5%B0%94%E7%B3%BB%E6%95%B0 (Engel's Coefficient)

http://tw.aboluowang.com/2018/1028/1195781.html