有人有Chegg的account嗎? 求貼答案給我~~~ 謝謝!!!

WTL91

This problem tests your understanding of the effect of the income distribution on savings rates.

The economy of Sonrisa has 1000 people in three income categories: poor, middle class, and rich. The

poor ear $500 per year and have to spend it all to meet their consumption needs. The middle class earn

$2,000 per year, of which $1,500 is spent and the rest saved. The rich earn $10,000 per year, and consume

80% of it, saving the rest.

(a) Calculate the overall saving rate in Sonrisa if 20% of the people are poor and 50% are in the middle

class.

(b) Suppose that all growth occurs by moving people from the poor category to the middle-class category

(all poor people become middle-class people). Will the saving rate rise over time or fall?

(c) Answer part (b) using another growth scenario, where growth changes over time in a way opposite to

that in (b): all middle-class people become poor.

WTL91

小胖爱琪琪 发表于 2013-12-4 12:09
a) Total Income of Sonrisa=200*500+500*2000+300*10000=$4.1million

Total saving=200*0+500*500+300*20 ...

Thank you so much!!