1.2 ẺͧԭԺⵢͧʹ- (Harrod-Domar Growth Model)
鹡÷ЪҪҵ ҡ Сŧع Harrod-Domar ͸Ժ´ѧ
1. (Saving) ǹ˹觢ͧЪҪҵ ôѧ
S = sY (1)
2. ŧع (Investment) 仵¹ŧͧع (K) ö᷹
I = K (2)
żԵͧ˹ɰԨ (Y) ТѺӹǹعŧع˹ɰԨ ѧ żԵШӹǹع ʵͤͧع (K) դѹѧ
K/Y = k (Capital-Output Ratio)
K/Y = k
㹷ش K = kY (3)
3. ЪҪҵ еͧդҡѺ ŧع ѧ ö¹ѧ
S = I (4)
᷹ (1) (2) ŧ (4)
sY = K (5)

(3) ҡѺ (5) ѧ
S = sY = kY = K = I
ͨ sY = kY (6)
÷ 2 ҧ Y k Ҩѧ
Y/Y = s/k (7)
Y/Y ͡¹ŧͧЪҪҵѵҡԭԺⵢͧGNPͧ
÷ (7) ʴѹǤԴԭԺ⵷ҧɰԨͧ Harrod-Domar ʴ֧ѵҡԭԺ⵷ҧɰԨ (Y/Y) ҡѺѴǹͧѵҡкɰԨ(s) ѵǹͧعͼżԵ (k: capital output ratio)


ͨӡѴ
ͧþѲҷǢͧѺǤԴ ЪҪҵҨԹ͡ŧعҡҧ ੾С㹻
ԭԺ⵷ҧɰԨ èеͧѺèѴ ѡçҹ ö㹡ҧἹ СúçþѲҷҡ ͧȹ