One can get another cup of drip coffee for 100 yen at any Starbucks on the same day. Given a tall cup costs 340 yen in Japan, I feel worsed off if not taking this advantage. Is the marginal utility of second cup higher than first?
During final exam week I was totally caffeinated, and now need decaffeinated.
So, to drink or not to drink, that is the question.
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