總體經濟學問題income vs comsumption … - 經濟

※ 引述《shmilorm (清淡辣椒油)》之銘言：
: take two points on a straight-line consumption function. when income(Y)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
: is 100, total consumption (C) is 140. when Y is 200, C is 200
: a. Autonomous consumption is 60
: b. The component of C that does not depend on income equals 80
: c. The component of C that does depend on income equals 60
: d. when Y is 200, autonomous consumption equals 1.0
: 我知道答案..不過整個看不懂...
: 有哪位大大有時間可以教教我嗎...

令 C = a + by

┌ 140 = a + 100b
└ 200 = a + 200b
=>b = 0.6, a = 80

/* C:消費 total consumption
a:自發性消費 Autonomous consumption
b:邊際消費傾向
Y:所得



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