德國經濟學家：Engel coefficient。
Engel coefficient is simply a food budget share.

The Engel coefficient is used for the purpose by The United Nations (UN),
where a coefficient above 59% represents poverty,
50-59% represents a state where daily needs are barely met,
40-50% a moderately well-off standard of living,
30-40% a good standard of living
and below 30% a wealthy life.

這樣一看，發現果子狸原來是“何不食肉糜”的。

=====我的恩格爾係數比隨機誤差小，所以我對通貨膨脹這個問題根本不開口。

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