I http://www.kengonutahara.com/teaching ( ) I 1 / 54
1 IS-LM 2 45 3 IS 4 LM I ( ) I 2 / 54
IS-LM ( ) I 3 / 54
1930 1933 1/4 GDP 1929 30% 1929 1933 = ( ) I 4 / 54
(1883-1946) = IS-LM (1904-1989) ( ) I 5 / 54
IS-LM 1 IS (Investment) (Saving) 2 LM (Liquidity) (Money) ( ) I 6 / 54
( ) I 7 / 54
45 ( ) I 8 / 54
(1/3) NX = 0 }{{} C = C(Y T) } {{ } Y T = C ( ) I 9 / 54
(2/3) MPC 1 0 < MPC < 1 ( ) = ( ) I = I r r = I ( ) I 10 / 54
(2/2) G = G, T = T E E = C + I + G = C(Y T) + I + G ( ) I 11 / 54
E E=C(Y-T)+I+G Y ( ) I 12 / 54
Y = E E Y=E 45 o Y ( ) I 13 / 54
E Y=E E=C(Y-T)+I+G 45 o Y ( ) I 14 / 54
E = C(Y T) + I + G 1 G G 2 T = MPC ( T) } {{ } ( ) I 15 / 54
G E Y=E E G E=C(Y-T)+I+G 45 o Y1 Y2 ( ) I 16 / 54 Y
Y Y = C + I + G... Y = C + I + G = C + G (I I = 0) = MPC (Y T) + G ( C = MPC (Y T)) = MPC ( Y T) + G ( (Y T) = Y T) = MPC Y + G ( T = 0)... Y = G ( ) I 17 / 54
(1/2) Y G = 1 } 1 {{ MPC } [ ] MPC = 0.8 Y G = 1 1 MPC 1 = 1 0.8 G = G ( ) I 18 / 54
(2/2) 1 1 MPC > 1 = ( ) I 19 / 54
(1/2) Y = C(Y T) + I + G 1. Y G 2. Y C 3. C Y 4. Y C. Y G ( ) I 20 / 54
(2/2)... 1. GDP 2. 3. GDP 4. GDP 5. GDP. ( ) I 21 / 54
T E Y=E E E=C(Y-T)+I+G 45 o Y1 Y2 ( ) I 22 / 54 Y
Y (1/2)... 1. 2.. GDP 3.. GDP 4.. GDP = ( ) I 23 / 54.
Y (2/2) Y = C + I + G... Y = C + I + G = C (I G I = G = 0) = MPC (Y T) ( C = MPC (Y T)) = MPC Y MPC T... Y = T ( ) I 24 / 54
(1/3) Y ( T = MPC ) } 1 {{ MPC } ( ) MPC 1 MPC ( ) I 25 / 54
(2/3) Y ( T = MPC ) } 1 {{ MPC } MPC = 0.8 MPC = 0.2 MPC ( ) I 26 / 54
(3/3) 1 1 MPC } {{ } MPC 1 MPC } {{ } G GDP GDP ( ) I 27 / 54
vs. (1/5) Y = ( ) I 28 / 54
vs. (2/5) ( ) I 29 / 54
vs. (3/cd5) G Y = G (Y T) = G C = G =MPC ( ) I 30 / 54
vs. (4/5) T Y = ( T) (Y T) = ( T) = + C = ( T) ( ) I 31 / 54
vs. (5/5) G T = IS-LM ( ) I 32 / 54
(1/3) [ ] Y = C + I + G C = 100 + 0.6(Y T) I = 200 G = 200 T = 100 1 Y 2 G = 300 Y Y/ G T = 100 3 G = 300 T = 200 Y Y/ G ( ) I 33 / 54
(2/3) [ ] Y = 100 } + 0.6(Y {{ T) } + }{{} 200 +G Y = 0.4Y = 300 0.6T + G ( ) I 34 / 54
(3/3) G T 1 T = 100 G = 200 Y = 2 T = 100 G = 300 Y = (1350 1100)/(300 200) = = 3 T = 200 G = 300 Y = (1200 1100)/(300 200) = ( ) I 35 / 54
IS ( ) I 36 / 54
IS I r r I = IS = r Y ( ) I 37 / 54
IS E E=Y r r 1 Y 1 Y 2 E=C+I(r )+G E=C+I(r )+G 1 Y 2 r 2 Y Y 1 2 IS Y ( ) I 38 / 54
IS G E E=Y E=C+I(r )+G 1 2 r r 1 Y1 Y 2 E=C+I(r )+G 1 1 Y Y Y 1 2 IS IS Y ( ) I 39 / 54
IS 1 IS r I Y (Y = C + I + G 2 G IS G Y Y = C + I + G 3 T IS ( ) I 40 / 54
IS ( ) ( ) Y = C + I + G Y C G } {{ } S = I IS } Y C(Y {{ T) G } = }{{} I(r) ( ) I 41 / 54
IS r r r 1 S(Y ) 1 S(Y ) 2 r 1 r 2 I(r) r 2 I, S Y1 Y2 Y IS ( ) I 42 / 54
LM ( ) I 43 / 54
(1/2) i L(i) L(i) ( ) I 44 / 54
(2/2) r = i L( ) r = i π M P P = ( ) I 45 / 54
r M/P r* L(r) M/P ( ) I 46 / 54
r = = i i = r ( ) I 47 / 54
M r M 2/P M 1/P r 2 r 1 L(r) M/P ( ) I 48 / 54
LM L( ) r Y LM ( ) I 49 / 54
LM r r r 2 1 r LM r L(r,Y ) 2 2 r 1 L(r,Y 1) M/P M/P Y1 Y2 Y ( ) I 50 / 54
LM M r r LM r 2 r 2 LM r 1 L(r,Y ) r 1 M 2/P M 1 /P M/P Y Y ( ) I 51 / 54
( ) I 52 / 54
IS-LM (1/2) IS Y = C(Y T) + I(r) + G G T LM M P = L(r, Y) M ( ) I 53 / 54
IS-LM (2/2) r LM IS Y ( ) I 54 / 54