$B!x(B6$B!!(Bケインズ乗数効果理論の誤りに関する証明の$BN.$l(B

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ケインズ$BEj;q(B乗数効果理論に基づくケインズ有効需要原理$B!JM-8z<{MW$N86M}!K(Bは数学的に誤りである。

ケインズ乗数効果$B$OB8:_$7$J$$!#(B 

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$B$3$3$K$"$kFbMF$O!"8=Be7P:Q3X$NCf$G!"$H$F$b=EMW$G$O$"$k$,!J3F9q$N6bM;GK$?$sLdBj!K!"L$$@2rEz$,F@$i$l$F$$$J$$LdBj$G$"$k!#9M;!$r?<$a!"=q$-2C$($F$$$/$&$A$K!"0JA0$K=q$$$?FbMF$NCf$K=$@5$9$Y$-E@$,8+$($F$-$?!#$=$l$G!"O@=R$NCf$KL7=b$,$"$k>l9g$O!"8e=R$NJ}$r@5$H$7$F$b$i$$$?$$!#:G8e$K$O!"A4$F=q$-D>$9$D$b$j$G$"$k!#(B

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 $B!!!X8[MQ!&Mx;R$*$h$S2_J>$N0lHLM}O@!Y$O!"(B1935$BG/(B - 1936$BG/$K!"%8%g%s!&%a%$%J!<%I!&%1%$%s%:!J(BJohn Maynard Keynes$B!K$K$h$C$FCx$5$l$?!#$=$N;~0JMh!"%1%$%s%:>h?t8z2LM}O@$K4p$E$$$?M-8z<{MW86M}(B$B!JM-8z<{MW$N86M}!K(B$BM}O@$O8=Be7P:Q3X$N4pHW$N0l$D$r3NN)$7$?!##7#0G/$N4V!"$=$NM}O@$O!"652J=q$K$*$$$F$N$_$J$i$:!"/?t$N0[5D$r=|$1$P!"$I$s$JK\$b%&%(%V%5%$%H$b!"%1%$%s%:>h?t8z2LM}O@$K7k$S$D$$$?M-8z<{MW$N86M}$K4p$E$$$F5-=R$5$l$F$$$k!#(B

$B!!%1%$%s%:Ej;q>h?t8z2LM}O@$X$N0[5D$b!"(B$B?t3XE*$J!"Kt2q7W3X>e$N>ZL@$r7g$$$?$b$N$G$"$k$+(B*$B!"(B$BEj;q>h?t$NB8:_$rG'$a$?>e$G!"$=$NEj;q>h?t8z2L$O>.$5$$$H$7$F$$$k!#(B

* $BJ?@.(B21$BG/(B7$B7n#1#1F|!"%*!<%9%H%i%j%":_=;$N(BBrian Chapman$BGn;N$h$jFMA3(Be-mail$B$rD:BW$7$?!#$=$l$K$h$k$HF1;a$bD9G/$KEO$C$F%1%$%s%:>h?t8z2L<0$N8m$j$r8&5f$5$l$F$*$j!"A0Lk$KI.H$5$l$?$$!#%1%$%s%:>h?t8z2L<0$O8m$j$G$"$k$H$$$&7kO@$OI.

http://www.qedinteractive.com.au/DissEcon.html  

http://www.qedinteractive.com.au/Chapman%20Keynesian%20Multiplier%20Paper%20for%20ATEC%202009%20Revised.pdf  

$B!!1Q8l%3%s%F%s%D!"(BChapter1$B!"!x(B4$BCf$N(B[Question-18]$B$r8+$FM_$7$$!#L\2<$N8!F$$9$Y$-J}Dx<0$O!"$[$s$N(B2$B9T(B($B2<5-!K$G$"$k!#(B

Y2 = C2 + I2 , ΔY2 = ΔC2 + ΔI2, ΔC2 = ΔC1 = aK ΔY1, ΔY2 =ΔY1, ΔY1 - aK ΔY1 = ΔI2, ΔY1 = ΔI / (1 - aK). If a K =0.6, we have ΔY1= 2.5ΔI2.

$B!!(BFig.3-3$B$OH~$7$$!#>e5-$N<0$O!"(BΔI2$B"*(BΔI2+ ΔNX2 + ΔG2$B$HCV$-49$($?<0$r4^$a$F!"3N$+$K91Ey<0$@!#$I$3$K$b8m$j$O8+$D$+$i$J$$!#(B $B#7#0G/$N4V!"C/$b$,>h?t8z2LM}O@$N??h?t8z2L$r5?$C$F$b!"C/$b$=$NM}O@$r?t3XE*$KH?>Z$7!"$=$l$KBe$o$k?7$7$$M}O@$rDs<($9$k$3$H$O$G$-$J$+$C$?!#(B

$B!!I.h?t(B1/(1-MPC)$B$N0?$kDj?t$H$7$F$NB8:_$OG'$a$F$b!"$=$l$O%1%$%s%:$N0U?^$7$?Ej;q>h?t8z2L$r0UL#$9$k$b$N$G$O$J$$!"B($AEj;q>h?t8z2L$O?t3XE*$KB8:_$7$J$$$3$H$r

Fig.3-3$B!!%1%$%s%8%"%s>h?t8z2L?^(B

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(1)$B!!(B$B0lJ}$K$*$$$F!"5-9f&$(BY2$B$O<0!J(B3-37$B!K$K<($5$l$k$h$&$K!"Ev3:G/EYFb$N(BGDP$B$N3F@.J,$NA}J,$NOB$rI=$9$?$a$K;HMQ$5$l$k!#B>J}$K$*$$$F!"5-9f&$(BY1$B$O!"(BY1$B:BI8<4>e$K$*$$$F!"Nc$($P&$(BG2$B$N$_$HEy2A$JCM$r<($9$?$a$K;HMQ$5$l$k!#FC5-$N$J$$8B$j!":G=i$NDj5A$r:NMQ$9$k!#5-9f$N4JC12=$N$?$a$K!"&$@/I\>CHq!a(B0$B$G$"$k$b$N$H$9$k!#(B

$B&$(BY2 =$B&$(BC2 + $B&$(BI2 + $B&$(BNX2 + $B&$(BG

(3-37)

(2)$B!!(B$BFI2$B!J>CHq:b!K$O!"(BY2$B!J:G=*@8;::b!K$H$$$&7P:QLL$G$N7P:QNL(BΔY2$B$N0lItJ,$G$"$k!#>CHq$H$$$&L>$O!"(BGVA$B$NCf$N@.J,$,>CHq$H$$$&L>$N2<$K=8$a$i$l$?$b$N$G$"$k!#(B

(3)$B!!(B$BFI$B<0!J(B3-37$B!K1&JU$N3F@.J,$O!"$"$k4|4VFb$G$B$3$H$rG'$a$J$1$l$P$J$i$J$$!#$=$N<0$NCf$K$*$$$F!"$"$k@8;:J*$O4{$K@8;:$5$l!"JL$N@8;:J*$O!"$^$@@8;:$5$l$F$$$J$/!"L$Mh$N2?;~$NF|$+$K@8;:$5$l$k$G$"$m$&$H$$$&$h$&$J$3$H$O5v$5$l$J$$!#$b$7!"FI

(4)$B!!(B$BFI1 ($B=jF@(B) = ΔY2 ($B:G=*@8;:J*$NGd>e(B) = ΔY3 ($BCf4V@8;:J*9XF~$r=|$$$?862A$HMx1W!K$,(B1$BG/4VFb$G$J$j$?$D$3$H$rG'$a$J$1$l$P$J$i$J$$!#99$K!"(BΔY1=Σ$B@.J,(B1$B!"(BΔY2=Σ$B@.J,(B2$B!"(BΔY3=Σ$B@.J,(B3$B$HJ,2r$G$-$k$H$-!"Nc$($P!"(BΔY1=ΔY2$B$,$J$j$?$D$H$-$O!"(BΣ$B@.J,(B1=Σ$B@.J,(B2$B$,$J$j$?$D$3$H!"5Z$S$=$N$H$-!"$I$A$i$+$NJU0lJ}$@$1$+$i@.J,$N0lIt$r8:$8$F$O$J$i$J$$$3$H$rG'$a$J$1$l$P$J$i$J$$!#(B

(5)$B!!(B$BFI1$B!"(BΔY2$B!"(BΔY3$B$N7P:QE*FCD9$rG'$a$?$b$N$H$9$k!#$=$l$i$N7P:Q;XI8$O!"3F!9$N@.J,$r;}$C$F$$$k!#Nc$($P!"(BΔY3$B$N@.J,$O8[MQ>j!&!&Ey!"(BΔY2 $B$N@.J,$O%;%/%?!<(B1$B;:6H!"%;%/%?!<(B2$B;:6H!&!&!&$N:G=*@8;:J*Ey$G$"$k!#FI2 $B!K$N0?$k@.J,!JNc$($P!"(BΔC2$B!K$O!"JL$N7P:QLL$N@.J,!JNc$($P!"8[MQ>j!&!&Ey!K$NAH@.$G35G0E*$KI=$7F@$k$H$$$&$3$H$rG'$a$J$1$l$P$J$i$J$$!#$3$N35G0$O!";:6HO"4XI=$G:NMQ$5$l$F$$$k35G0$G$"$k!#$J$*!"1QJ8!"(BPart2,Chapter2$B!"!x(B1 $B$K$*$$$F!"(B $BI.[ΔY2(GDP)$B$N@.J,%Y%/%H%k(B]$B!a(B[$BJQ49%^%H%j%C%/%9(B][ΔY3(GVA)$B$N@.J,%Y%/%H%k(B]$B$N4X78$,M6F3Ds<($5$l$F$$$k!#(B$B=>$C$F!"K\Mh!";:6HO"4XI=$NCf$K!">h?t8z2L35G0!J=jF@A}$K$h$kBh#2

(6)$B!!(B$B:G=*@8;:J*!"=jF@!";Y=P$O!"(B1$BG/0JFb$KF1;~$K1( = ΔG2 )$B$r1$B$N;q6b$O!"0\E>$d3$B!J8[MQ

(7)$B!!(BAssumption5 ( $B&$(BNX2 + $B&$(BG2 = 0$B!"(B$BKt$O&$(BI2=$B&$(BNX2=0$B!"(B$B1QJ8!x(B3)$B$N:NMQ$r2>$K5v$9$b$N$H$9$k$J$i$P(B$B!"(B$B%1%$%s%8%"%s%/%m%9$G$O!J2 = ΔG2 +ΔC2$B$,@.N)$9$k$3$H$rFIh?t8z2L$H$7$FCN$i$l$F$$$k=jF@(BΔY1 =ΔG2/(1 - aK)$B$r4{$KCN$C$F$$$k!#(BΔG2/(1 - aK)=(ΔY2 - ΔC2)/(1 - ΔC2/ΔY2) = ΔY2=ΔG2+ΔC2$B$G$"$k!#(B

$B!!%1%$%s%9>h?t8z2L<0$O!"(BΔG2$B$r2$B$KM6H/$5$l$F2?;~$NF|$+!K!"%1%$%s%:>h?tG\$N=jF@$,F@$i$l$k$HM}2r$5$l$F$$$k!#$7$+$7$J$,$i!">e5-<0$O!"7k6I$N$H$3$m!"@/I\$O!"=jF@&$(BY1=ΔG2/(1 - aK)$B$r2=ΔG2+ΔC2$B$r&$(BY1$B$H&$(BY2$B$rB,Dj$9$k4|4VFb$K3N

$B!!2$B$N2$B$,4{$KH/@8$7$F$$$k$H$$$&$3$H$r<($7$F$$$k$N$@$H$$$&;v$B!J!v!K!#(BFig.3-3$B$O!"@5$7$/$OF1?^$NCf$G!"(BΔY2=ΔG2$B$r(BΔ Y2=ΔG2+ΔC2$B$HCV$$$F!"(BFig.4-6$B$N$h$&$K=$@5$5$l$J$1$l$P$J$i$J$$!#(B [$B!v$3$l$O!"6Q9UM}O@2r@O$K$h$kI,A3$N7k2L$G$"$k$3$H$,8e$K<($5$l$k!#(B] 

Fig.4-6$B!!=$@5$5$l$?%1%$%s%8%"%s%:>h?t8z2L?^(B

$B!!$7$+$7$J$,$i!"$3$N$3$H$O!"(BΔG2$B$@$1$+$i<+A3$K!JM6H/E*$K!K(BΔY1 (=ΔG2+ΔC2)$B$rAO=P$7$h$&$H$9$k@/I\$NL\E*$G$O$J$$!#$3$NE@$+$i!"(BFig.4-6$B$O!"(BAssumption5 $B$N2<$G!"(BΔG2$B$H(BΔC2$B$NN>2$B$N$_$KBP$7$F$O(BFig.4-6$B$b8m$j$G$"$k(B$B!#FI2=0$B$H$9$k$3$H$,$G$-$J$$$3$H$r3NG'$5$l$?$$!#=>$C$F!"(BFig.3-3$B$OFs=E$K8m$C$F$$$k!#(B

(8)$B!!(B$BC/$+$O$3$&8@$&$+$b$7$l$J$$!#!V;Y=P&$(BG2$B$N$_$+$i!"D>$A$K!"=jF@&$(BY1=$B&$(BG2 +$B&$(BC2$B$rF@$k$3$H$,$G$-$J$$$3$H$0$i$$CN$C$F$$$k!#2f!9$O!">CHq@-8~!"$"$k$$$O&$(BG2$B$+$iM6H/$5$l$?>CHq0UM_$K4p$E$$$F!"&$(BC2$B$rL$Mh$N2?;~$NF|$+$KF@$k$3$H$r4|BT$7$F$$$k$N$@!W!#$3$N$B>-Mh$K4|BT$9$k>CHq&$(BC2$B$NM6H/$O!"&$(BG2$B$,2$B$O4{$KBg$$$K7P:Q8z2L$rF@$F$$$k$N$G$"$k(B$B!#(B

$B!!%"%&%H%W%C%H!J:G=*@8;:J*!K&$(BG2$B$H$=$l$KBP1~$9$k%$%s%W%C%H!J(BGVA$B!K$H$N4X78$O!"(BFig.3-14$B$K<($5$l$k!#2$B$O!"$=$l$,L5$+$C$?$i!"K\Mh(BGVA$B$NCf$GL14VEj;q$N8:>/$K$h$j8:>/$9$Y$-4k6HMx1W$N0lIt$K$J$C$?$N$+$b$7$l$J$$$7!"8[MQ

Fig.3-14$B!!;:6HO"4XI=?^(B

(9)$B!!(B$BFI2-Y1$BLdBj$H!"1QJ8!"!x(B4$B!"(B[Question-18]$BCf$K<($5$l$k&$(BI2-Y1$BLdBj$H$O!"8_$$$K>/$7$P$+$j0c$C$?LdBj$G$"$k$H$$$&$3$H$rCN$k$Y$-$G$"$k!#I.$BA02= $B&$(BNX2= 0$B$,2>Dj$5$l$F$*$j!"8e2 =$B&$(BNX2 = 0$B!"Kt$O&$(BI2$B$NCf$K&$(BG2$B$H&$(BNX2$B$,4^$^$l$k$H$$$&$3$H$,2>Dj$5$l$F$$$k!#(B

(10)$B!!(B 読者は今までの説明を了解されたであろうか。実は、今までの説明に$B$O!"(B大きな誤りがあるのである。要するに、$B%1%$%s%:>h?t8z2L$r<($9(BFig.3-3$B$H(BFig.4-6$B$O!"(BΔC2= 0$B$H$9$k$3$H$,$G$-$J$$$+$i$H$$$&M}M3$r=|$$$F$b!"(B全くの誤りなのである。これら二つの図は、式(31)に対して、Assumption5(ΔI2=ΔNX2= 0)という仮定を設けて作られたものである。それで、$B&$(BY1=ΔG2/(1-aK)が得られた。実は、Assumption5を設けることはできない。何故なら、ΔY1=ΔG2/(1-aK - aI -aNX)であり、aI(限界民間投資性向)は大きな値であり、 aI = 0と仮定することはできない$B$N$G$"$k(B(英文、$B!x(B4$B!"(B[Answer-24]参照)。aI $B$r9MN8$7$?$i!"%1%$%s%:>h?t$O(B10$BG\0J>e$K$b$J$k$G$"$m$&!#(B

$B!!$3$N$3$H$K$D$$$F!"$b$&>/$7@bL@$r2C$($h$&!#(BAssumption5(ΔI2=ΔNX2= 0)$B$,B8:_$7$J$$2<$G$N2r@O$r%1!<%9(B1$B$H$7$h$&!#(BAssumption5$B$N2<$G$N2r@O$r%1!<%9(B2$B$H$7$h$&!#8B3&>CHq@-8~$O!"(BaK=ΔC2/ΔY2 $B$GDj5A$5$l$k!#%1!<%9(B1$B$N2<$G$O!"$b$7!"(BaK=0.6$B$G$"$k$H$9$l$P!"(B(ΔI2 +ΔG2+ ΔNX2)/ΔY2 =0.4$B$,@.$jN)$C$F$$$k!#(B

$B!!%1!<%9(B2$B$N2<$G$O!"F1$8>r7o$G!"(BΔG2/ΔY2 =0.4$B$,@.$jN)$D$3$H$K$J$k!#$3$l$O!"8=2/ΔY2$B$N2/Y2$B$NE}7WCM$K6a$$$G$"$m$&!#2>$K(BΔG2/ΔY2=0.1$B$H$9$k!#$=$&$G$"$l$P!"(BΔG2$B$H(BΔY2$B$r4^$`?^$G$O!"I,$:!"(BΔG2$B$O(BΔY2$B$N(B1/10$B6a$/$NBg$-$5(B(ΔY2=10ΔG2)$B$GIA$+$l$F$$$J$1$l$P$J$i$J$$!#(B

$B!!(BFig.4-6$B$r8+$F8+$h$&!#%1!<%9(B2$B$N2<$G!"&$(BY2$B$H&$(BG2$B$NHf$O(B1$BBP(B0.4$B$GI=$5$l$F$$$k!#$3$l$O!"&$(BI2$B$H&$(BNX2 $B$NB8:_$rL5;k$7$?$?$a$K5/$3$C$?$b$N$G$"$j!"(BFig.4-6$B$OA4$/$N8m$j$G$"$k!#$3$N860x$O!"(B$B&$(BY1$B$N0UL#$9$k$H$3$m$OJQ$($F$$(B$B$J$$(B(ΔY1$B$O<0!J(B3-37$B!K1&JU$NA4It!K$N$K!"<0!J(B3-37$B!K$N1&JU$+$i$@$1&$(BI2 +$B&$(BNX2$B$r>C5n$7$?$?$a$G$"$k!J&$(BC2 + $B&$(BG2 $B$O<0!J(B3-37$B!K1&JU$N0lItJ,!K!#$3$3$G!"&$(BY2$B!b&$(BY1$B$,$*$-!"%1%$%s%8%"(B$B%s%/%m%9>r7o$,K~B-$5$l$F$$$J$$(B$B$3$H$K$J$k!#=>$C$F!"%1%$%s%:>h?t8z2LM}O@$NBg$-$J8m$j$N0l$D$O!"(BAssumption5(ΔI2=ΔNX2 = 0)$B$r@_$1$?$3$H$K$"$C$?$3$H$K$J$k!#(B[$B$3$NCJMn$O!"8e$G6Q9UM}O@\$7$/O@$8$k!#(B]

$B!!:G=i$+$i!"(BY1 =C2  +  G$B$HDj5A$7$F$$$?$i!"$3$N:8JU$H1&JU4V$NL7=b$,@8$8$F$$$J$+$C$?$3$H$K5$$,IU$+$l$?$G$"$m$&$+!#C"$7!"L14VEj;q$OB8:_$7$J$$$H$$$&Hs8=i (i=1,2,  )$B$H$=$l$i$NA4BN!J$3$l$bMWAGJQ?t$H$_$J$9!K$+$i$J$k0?$k%7%9%F%`$K$*$$$F!"0?$kFCJL$JMWAG(Bx$B#j(B$B$N$_$,B>$NMWAGJQ?t$NHy>.JQ2=$N1F6A$rDj$r@_$1$k>l9g$r9M$($h$&!#Nc$($P!"Ej;q$@$1$,Mx;RN($N4X?t$G$"$k$H$$$&$h$&$J>l9g$G$"$k!#$3$NLdBj$G!"Mx;RN($K4X78$7$J$$MWAG$N2r@O$rHyJ,$rH<$C$F9T$&$H$-$K$O!"MWAG$H$7$F$NEj;q$HA4BN$NCf$NEj;q$NN>J}$rF1;~$K=|$+$M$P$J$i$J$$$3$H$OMF0W$KM}2r$G$-$k$G$"$m$&!#(B

$B!!B;1WJ,4tE@M}O@$+$i!"DB6b$K$O@8;:NL$NJQ2=$KHfNc$7$FJQ2=$9$kDB6b$H8GDjHqE*$JDB6b$,B8:_$9$k$3$H$r!":#$G$OC/$G$bCN$C$F$$$k!#Nc$($P!"@8;:NL$HDB6b$r4^$`862A$HMx1W$K4X$9$k2r@O$r9T$&$H$-!"$3$N2r@O$KBP$7!"HyJ,2r@O$r9T$&$H!"FCJL$KCm0U$7$J$$$H!"8GDjHqE*$JDB6b$,H4$1Mn$A$F$7$^$&$N$G$"$k!#$3$l$i$,!"HyJ,2r@O$N7P:QM}O@2r@O$G$b$J$5$l$F$$$J$$$+!":F6cL#$NI,MW$,$"$k!#(B

(11)$B!!(Ba(t)$B$r;~4V(Bt$B$NHs@~7A4X?t$H$7!"(BaK(t) = $B&$(BC2(t) / $B&$(BY1(t) , aI(t) = $B&$(BI2(t) / $B&$(BY1(t),  aNX(t) = $B&$(BNX2(t) / $B&$(BY1(t), aG(t) = $B&$(BG2(t) / $B&$(BY1(t)$B$HI=$9!#(BaK(t), aI (t)$B$J$I$O3F:b2_$N8B3&;Y=P@-8~$G$"$k!#$3$N$H$-!"G$0U$N#t$K$*$$$F!"(BaK(t) = $B&$(BC2(t)/ $B&$(Bt / ( $B&$(BY1(t)/ $B&$(Bt )$B$G$"$k$3$H$+$i!"

aK (t) +  a (t) +  aNX (t) +  aG (t) =1

(3-R7)

$B:F$S<0(B(3-R7)$B$NN>JU$K&$(BY(t)  (= $B&$(BY1(t)  = $B&$(BY2(t))$B$r3]$1$l$P!"

$B&$(BY(t) =  aK (t) $B&$(BY(t) +  a (t)  $B&$(BY(t) +  aNX (t)$B&$(BY(t)  + aG (t) $B&$(BY(t)  $B!!(B 

  (3-R7-1)

$B<0(B(3-R7-1)$B$+$i!"Nc$($P!"
$B&$(BY(t)=$B!!(B($B&$(BI(t) +  $B&$(BNX(t) + $B&$(BG(t) )/$B!J(B1$B!!(B-$B!!(BaK(t) ) (3-R7-2)
$B&$(BY(t)=$B!!(B( $B&$(BC(t) +  $B&$(BI(t) ) /$B!J(B1 - aNX(t) - aK(t) ) (3-R7-3)

$B!!<0!J(B3-R7-2$B!K$O!"

($B&$(BI(t) + $B&$(BNX(t) + $B&$(BG (t)) : $B&$(BY(t) = $B!J(B1$B!!(B-$B!!(BaK(t) ) : 1$B!!!!!!!!!!(B

(3-R7-4)

$B&$(BC(t) : $B&$(BY(t) = aK(t) : 1

(3-R7-5)

$B!!B($A!"<0!J(B3-R7$B!K$d!"<0(B(3-R7-4)$B$H<0(B(3-R7-5)$B$NAH$_9g$o$;$O!"A4BN&$(BY(t)$B$HItJ,&$(BC(t)$B!"(B $B&$(BI(t)$B!"(B $B&$(BNX(t)$B!"(B $B&$(BG(t)$B$H$N4V$N3d9gHfN($rI=$7$F$$$k!#(B$B$=$&$G$"$k$,8N$K!"<0(B(3-R7-2)$B$O(B$B91Ey<0$J$N$G$"$k(B$B!#(B

$B!!99$K!"5-9f$N4JC1$N$?$a$K!"4V@\@G(B=0$B$H2>Dj$9$k$H$-!"&$(BGVA $B$O!"&$(BGVA = $B&$(B D+ $B&$&P(B+ $B&$(BW$B!!(B+$B&$(BT$B!!(B-$B!!&$(BT = $B&$&P(B + $B&$(BW$B!"$3$3$K!"&P!a1D6HM>>j!"(BW$B!a8[MQ@\@G$r4^$`0\E>$HI=$5$l$k!#(BGVA$B$H(BGDP$B$N4V$N4X78$+$i!"5-9f(B(t)$B$r>JN,$7$F!"
$B&$(BY =  ($B&$&P(B + $B&$(BW ) + ($B&$(BC + $B&$(BI +  $B&$(BNX + $B&$(BG) - ($B&$&P(B + $B&$(BW)   + ($B&$(BT - $B&$(BT)  
 =  ($B&$&P(B+ $B&$(BW ) +{$B&$(BI + ($B&$(BG - $B&$(BT) +$B&$(BNX} -($B&$&P(B +$B&$(BW - $B&$(BT - $B&$(BC) (3-R7-6)

$B!!A05-(B$B!J(B10$B!K(B$B$K=R$Y$?$h$&$K!"2?8N!"2>Dj&$(BI2=$B&$(BNX2=0$B$r@_$1$k$3$H$,$G$-$J$$$N$+!)$=$NM}M3$O!"(B Y2,$B!!(BC2,  I2, G2, NX2$B$+$i$J$k(B5$B8D$N7P:QNL4V$K$*$$$F!"I,$:<0!J(B3-37$B!K$,$J$j$?$?$M$P$J$i$J$$$+$i$G$"$k!#$=$l$O!"F1$8$/!"<0(B(3-37)$B$,I,$:$J$j$?$?$M$P$J$i$L$3$H$HF1$8$G$"$k!#$3$N0UL#$O!"3F:b2_$O

(a)$B!!<0!J(B3-37$B!KKt$O<0!J(B3-R7$B!K$,@.$jN)$D$h$&$K!"3F:b2_$O@8@.$5$l$k!#(B

(b)$B!!3F:b2_$O!"K\Mh!"8_$$$KFHN)$G$"$j$J$,$i!"8_$$$K4Q;!$7$"$$!"8_$$$K1F6A$r$P8_$$$K=>B0E*!"FHN)E*$K@8@.$5$l$k!#(B

$B#c(B)$B!!<0!J(B3-R7-6$B!K$K$*$$$F!"r7o$rK~B-$9$k$h$&$K!"3F:b2_$O@8@.$5$l$k!#(B 

$B&$(BI + ($B&$(BG - $B&$(BT) +$B&$(BNX = $B&$&P(B +$B&$(BW - $B&$(BT - $B&$(BC  (3-R7-7)

($B#d(B)$B!!!V<0!J(B3-R7$B!K$N:8JU3F9`$O>o$KDj?tCM$G$"$k!W$H$$$&$3$H$OI,$:$7$b$J$$!#(B

(e)$B!!#37P:Q;XI84V$K4X$9$kJ}Dx<0$NCf$G!"3F9`$O2<5-(B$B!J(B19$B!K(B$B$K<($9B;1WJ,4tE@7?%$%s%W%C%H!&%"%&%H%W%C%H?^$rK~B-$9$k$h$&$K?M4V$N0U;V$,H?1G$5$l$F!"@8@.$5$l$k!#(B

$B!!=>$C$F!"e!"EvA3$K5/$-$k!#Nc$($P!"&$(BG2$B$r4v$iA}$d$7$F$b!"&$(BY2$B$O0l8~$KA}$($J$$!#&$(BG2$B$r$[$s$N>/$7A}$d$9$3$H$K$h$C$F!"B>$N:b2_@8;:$,BgI}$KA}2C$9$k(B $B!#(B

$B!!$3$l$,?M4V$N7P:Q3hF0$N4pK\86M}$G$"$k!#(B

(12)$B!!(B$BDj$r@_$1$k!#(B

$B2>Dj(B7:$B&$(BG2 = $B&$(BNX2 = 0
$B2>Dj(B7$B$N2<$G$O(B$B!"(BFig.4-6$B$K$*$$$F!"&$(BG2$B$NBe$o$j$K&$(BI2$B$rCV$-49$($??^$,F@$i$l$k!#$3$N>l9g$K$O!"&$(BG2 = 0$B$G$"$k$?$a!"(B$BDI2CE*@/I\;Y=P$NLdBj<+BN$,$J$j$?$?$J$$!#(B

(13)$B!!(B$B>e=R$N(B仮定7$B$K;w$F$$$k$,!"Dj$r@_$1$k!#(B

$B2>Dj(B8:$B&$(BG2+$B&$(BNX2$B$O!"&$(BIT$B$NCf$K4^$^$l$k!#(B

$B!!2>Dj(B8$B$N2<$G$O!"(BΔY2=ΔC2+ΔIT $B$,F@$i$l$k!#$3$N>l9g$N%1%$%s%:>h?t8z2L?^$O!"(BFig.4-6$B$G(BΔG2$B$r(BΔIT$B$GCV$-49$($??^$r!V%1%$%s%:86Cx?^!W$H$J$E$1(B,Fig. 5-5$B$K<($9!#(B

Fig. 5-5 $B%1%$%s%:86Cx?^(B

$B!!$3$N7P:Q%b%G%k$O(B,$BT$B$r6!5k$7$?$i!"4|4V$rDj$a$:!"(B$B2?;~$NF|$+(B$B!"(BΔ$B#C(B2$B$,(BΔIT$B$K8+9g$C$F<+A3$K6!5k$5$l$k$b$N$H$7$F$$$k!#$3$N?^$G$O!"%1%$%s%8%"%s%/%m%9>r7o(B($B&$(BY2=$B&$(BY1)$B$OK~B-$5$l$F$$$k!#(BMPC$B$OB8:_$9$k$N$@$+$i!"$3$N?^$r7P:Q8=>]$N2r@O$K;H$C$F$*$+$7$J$3$H$,5/$-$k$@$m$&$+!#(B

$B!!>\$7$/$O1QJ8!"(B5.3$B!"(B5.4$B!"(B$B!x(B5$B$K@bL@$7$F$$$k$,!"7kO@E*$K8@$($P!";~4V$NJQ2=$rH<$&7P:Q2r@O$K%1%$%s%:86Cx?^$r;H$&$3$H$O$G$-$J$$!#%1%$%s%:86Cx?^%b%G%k$O!"(BC2$B$H(BIT$B$N(B2$BFHN)JQ?t!"(BY2$B$N(B1$B=>B0JQ?t$+$i$J$k(B2$B<+M3EY7O%7%9%F%`$G$"$k!#%1%$%s%:$,(BMPC$B$NB8:_$N2>Dj$r@_$1$?=V4V$K!"%7%9%F%`$K(B1$B8D$N<+M3EY94B+>r7o$,2C$($i$l$k!#$=$N7k2L!"%7%9%F%`$O(B1$B<+M3EY7O%7%9%F%`$H$J$k!#(B

$B!!%1%$%s%:$O>h?t8z2L(BΔY1$B!a&$(BIT/(1-MPC)$B$rT$B$O!"(B1$B<+M3EY7O%7%9%F%`$K;D$C$?(B1$B8D$NFHN)JQ?t$G$"$i$M$P$J$i$J$$!#&$(BIT$B$O;~4V$KL54X78$JJQ?t$H$7$F!"(BΔY2$B$N;OE@$GM?$($i$l$J$1$l$P$J$i$J$$!#&$(BC2$B$O&$(BIT$B$K=>B0$9$k!#=>$C$F!"&$(BC2$B$H&$(BIT$B$NN>h?t8z2L?^$,<($97P:Q$O!";~4V7P2a$K4X78$7$J$$7P:Q$G$"$k!#$3$N4X78$r(BFig.5-4$B!"$K<($9!#C"$7!"&$#y!a&$(BIT$B!"&$#x!a&$(BC2$B!"&$#z!a(BΔY2$B$G$"$k!#(B

Fig.5-4

$B!!(Bついでながら、我々は残った1変数に対し、ΔC2を選ぶこともできる。このときは、ΔY1=ΔC2/MPCである。同じように、ΔY1はΔC2に従属し、両者とも時間の経過に関係しない。ΔY1(=ΔY2)とΔC2とΔITからなるシステムが1自由度系であるとは、これらの各変数が時間の関数であってもよいが、結局はこれらの動きはシステムの全体であるΔY11個の動きで$BM#0l$K(B決まり、ΔC2とΔITはΔY2の中の一定$BHfN($N(B成分であるということである。

(14)$B!!(B$B%1%$%s%:86Cx?^M}O@$K$*$$$F$O!"A4BN&$(BY2$B!"B($A&$(BC2$B$H&$(BIT$B$O;~4VJQ2=$K4X78$;$:!"%3%s%H%m!<%kITG=$JJQF0$9$k?M4V$N0U;V7hDj$K4X78$9$k!#$5$i$K!"&$(BIT$B$O>o$K&$(BY2$B$N:G=*6!5k$NA0$KM?$($i$l$J$1$l$P$J$i$J$$!#$D$^$j!"%1%$%s%:86Cx?^$,<($97P:Q$H$O!"(BC2$B$H(BIT$B$,;~4V$NJQ2=$K4X78$7$J$$7P:Q$G$"$k!#$3$NDj$5$l$F$$$k$B!!$3$N7P:Q%b%G%k$O!":b2_$d=jF@$N8=:_$NJ,G[$NLdBj$r2r@O$9$k$K$OE,Ev$+$b$7$l$J$$$,!";qK\o7P:Q>uBV$K$*$1$k7P:Q$NF0$-$r2r@O$9$k$K$O8~$$$F$$$J$$!#$3$N;kE@$O!";qK\o7P:Q>u67$K$*$1$kBgLdBj!"$J$+$s$:$/!"<:6HLdBj$r2r@O$9$k>l9g$K$OFC$K=EMW$G$"$k!#(B

(15)$B!!(B$B%1%$%s%:86Cx?^M}O@$K$*$1$kBg$-$J7g4Y$O!"&$(BIT$B$N6!5k$r0U?^$7$?=V4V$K!"(BMPC$B>r7o$,GK$l$k$H$$$&$3$H$G$"$k!#$3$NLdBj$r2r7h$9$k$?$a$K$O!";~4V$K4X78$7$J$$&$(BIT$B$N6!5k$K9g$o$;$F!"F1;~$K!"=V;~$K!"&$(BIT$B!&(BMPC/(1-MPC)$B!a&$(BC2$B$r6!5k$7$J$1$l$P$J$i$J$$!#(B

(16)$B!!(B$B%1%$%s%:86Cx?^M}O@$K$*$1$k2$B$r6!5k$9$k=V4V$K@8$8$k!#$3$N$3$H$r(BFig 5-6$B$r;H$C$F@bL@$7$h$&!#(B $B&$(BIT = $B&$(BI2+$B&$(BNX2+$B&$(BG2$B$H$9$k!#K\2r@O$K$*$$$F&$(BG2$B$r(B1$B<+M3EY$N3:Ev$9$k(B1$BJQ?t$H$7$F&$(BG2$B$rA*Br$9$k$H$-!"F1;~$K;D$j$N&$(BI2$B$H&$(BNX2$B$NLr3d$r9MN8$7!"$=$l$r2r@O$NCf$K

Fig 5-6

$B!!%1%$%s%:86Cx?^M}O@$K$h$j!"%1%$%s%:>h?t8z2L<0&$(BY1$B!a!J(BΔI2+ΔNX2+ΔG2$B!K(B/(1 - MPC)$B$,F3$+$l$k!#(BMPC$B$O(BΔIT$B$KBP$7$FDj5A$5$l$F$$$k!#=>$C$F!"(BΔG2$B$N6!5k$KH<$C$F!"&$(BC2$B$@$1$G$J$/!"(BΔI2$B$H(BΔNX2$B$b!"F1;~$K!"=V;~$K6!5k$5$l$J$1$l$P$J$i$J$$!#(B $B$3$N$3$H$O!":$$C$?>u67$r0z$-5/$3$9!#%1%$%s%:86Cx?^M}O@$G$O!"<:6HLdBj2r@O$K$*$$$F!"(BΔI2$B$H(BΔNX2$B$O(BΔG2$B$KH<$C$F=V;~$K6!5k$5$l$J$$(B($BL14VEj;q<{MW$,8:>/$9$k!K$+$i$3$=!">h?t8z2LM}O@$r;H$&$+$i$G$"$k!#(B

$B!!%1%$%s%:86Cx?^M}O@$G$O!"(BΔG2$B$N6!5k$KH<$C$F!"F1;~$K!"=V;~$K!"(BΔC2$B!"(BΔI2$B!"(BΔNX2$B$N6!5k$,MW@A$5$l$k!#%1%$%s%:86Cx?^M}O@$,$3$N$h$&$J$b$N$G$"$C$F$b!"$3$NM}O@$NF0E*7P:QLdBj2r@O$K$*$1$kM-8z@-$r/$J$/$H$b!"F0E*$J7P:QLdBj2r@O$KBP$7$F$O$=$N8zNO$r<:$&$G$"$m$&!#(B

(17)$B!!(B$B>e=R$N$h$&$K!"7P:Q$O;~4V$K4X$7FHN)$JB?<+M3EY7O$G$"$k$Y$-$J$N$K!"k = MPC$B$G$"$k!#$J$*!">CHq@~$O(B2$B<4$K@ZJR$r;}$D!#(BKuznets$B7?$O!"@~7A@~$G86E@$rDL$k!#

Fig. 3-11 Corrected Keynesian multiplier effect model $B!!I.o7P:Q$NCf$NB?$/$N<+M3EY$r;}$D7P:Q%7%9%F%`$NCf$+$i!"7k2LE*$J>CHq$NF0$-$@$1$r8+$k$3$H$K$h$C$FF@$i$l$?$b$N$G$"$k!#4k6HMx1W$rJ];}$7$h$&$H$9$k8D!9$N4k6H$NEXNO$HCHq?4M}$K4p$E$/8B3&>CHq@-8~$,$"$k!#3F!9$N>CHq-Mh$N@83h$rM=A[$9$k!#4k6H2H$O8=:_$N>CHq-Mh$N4k6H$N;Q$rM=A[$9$k!#A40w$,8=:_$N7J5$$N>u67$r4Q;!$7<+8J$N9TF0$rF|!97hCG$7$F$$$k!#(B

$B!!>CHq:b$HEj;q:b$NF0$-$O1&5S$H:85S$NF0$-$K;w$F$$$k!#$b$7!"9T$/l9g$NJb9T$O!"1&5S$H:85S$NF0$-$,$"$?$+$b(B1$BBP$G!"N>5S$NF0$-$,(B1$B<+M3EY7O$N$h$&$K8+$($k$@$m$&!#9T$/l9g!"N>5S$NF0$-$O#2<+M3EY7O$GF0$/!#(B

$B!!$3$N$h$&$K!">CHq:b$HEj;q:b$O!"0BDj$7$?Dj>o7P:Q$NCf$G$O#M#P#C$,0lDj$KJ];}$5$l!"(B1$B<+M3EY7O$N$h$&$KF0$/$N$G$"$m$&!#$=$7$F!"7P:Q$NF0$-$,;~4VE*$KIT0BDj$J>uBV$K$J$k$H!"3F:b2_$OFHN)$K<+M30U;V$GF0$-!"FHN)@-$H$$$:b2_K\Mh$N@-

(18)$B!!(B$BEj;q$KBP$9$k%1%$%s%:>h?t!"(B1/(1-MPC)$B$OB8:_$7$J$$$N$@$+$i!"$b$A$m$s!"(B$BAE@G>h?t!"(BMPC/(1-MPC)$B$bB8:_$7$J$$(B$B!#$3$N$3$H$O!"@G$OA4BN=jF@$NCf$G$N=jF@$G$"$k$N$@$+$iEvA3$G$"$k!#$J$*!"$3$N9`$N>\:Y$K$D$$$F$O!"1QJ8!"(B Chapter1$B!"(B5.1$B$r;2>H$5$l$?$$!#(B 

(19)$B!!(B$Bh?t8z2LM}O@$K$O!"$b$C$H:,K\E*$K=EBg$J7g4Y$,$"$k!#A0@a$G=R$Y$?DL$j!"9qL17P:Q7W;;$K$h$C$F7P:QLdBj$r2r@O$9$k$H$-$K$O!"

Fig.5-2$B$O!"(B$B;~7ONs7?!JKt$O!"3d9g7?!K%$%s%W%C%H!&%"%&%H%W%C%H?^(B$B$r<($9!#K\?^$N?eJ?<4$O;~7ONs$H$7$F$N<4$O$=$N@8;:9b$KBP1~$9$k $B!J(B1$B!K!!B>$N=jF@$NI}$N>l9g$HF1$8$/!"1D6HM>>j!J?^Cf$N(BProfit$B!K$NI}$O!"A4$FA4BN(BY1$B$KBP$9$k$=$NItJ,$N3d9g$r<($9!#(B

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(3) $B!!(BGVA$BA}J,&$(BY$B$O!"&$(BY =$B&$&P(B +$B&$(BW +$B&$(BD$B!"$3$3$K!"&P!a1D6HM>>j!"(BW$B!a8[MQ$C$F!"$3$N7P:Q%b%G%k$G7P:Q2r@OM}O@$r:n$k$H!"&P$O(BY$B$H@5HfNc$7$F$$$k$N$G!"2r@O<0$NCf$K!"(B$B&$(BY$B$H&$(BW$B$K4X$9$k@5HfNc4X78<0$@$1$,8=$l$k(B$B!#(B

$B!!(BW$B$O!"V + WF$B!"$3$3$K!"(BWV$B!a(BY$B$KHfNc$9$k@.J,!"(BWF$B!a(BY$B$KHfNc$7$J$$@.J,!"$HI=$5$l!"(BW$B$O!"(B2$BJQ?t4X?t$G$"$k!#7J5$JQF0$,$"$k>l9g$K$O!"(BWF$B$O!"Dj?t$G$O$J$/!"7P1Du67$K1~$8$F<+8J$N0U;W$G7h$a$kJQ?t$G$"$k!#B($A!"7P1Du672<$K$"$C$F$b!"&P(B/Y$B$r0lDj$KJ]$D$h$&$K!"$"$k$$$O!"&P!d(B0$B$r0];}$9$k$h$&$K!"(BWV$B$H(BWF$B$NN>J}$rJQ2=$5$;$k!#7J5$$NJQF0$rBP>]$H$9$k7P:Q2r@O$KEv$?$C$F$O!"7h$7$F&$(BWF= 0$B$H$7$F$O$J$i$J$$!#$=$7$F!"<:6H2r@OLdBj$H$O!"$^$5$7$/!"&$(BWF$B$KBP$9$kLdBj$J$N$G$"$k!#(B

Fig.5-2 $B;~7ONs7??^(B

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$B!!B($A!"(B$B!V(B$B=i4|Ej;q(BΔI($B$N$_!K$rl9g!"(B$B!W$H$$$&J8@a$H!"%1%$%s%:>h?t8z2LM}O@$ON>N)$7$J$$(B$B!#7P:Q;\:v$,$3$NDL$j$G$"$l$P!"(BMPC$B>r7o$O0];}$5$l$J$$$7!"$=$NJ8@a$r!VDI2CE*Ej;q(BΔI$B$H>CHq(BΔC$B$rl9g!"!W$H2~$a$l$P!">h?t8z2L$OB8:_$7$J$$!#(B

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$B!!(B元に戻り、「消費刺激のために、国より、定額支出金ΔCMONEYを国民に$B;Y5k(Bした場合、限界貯蓄性向分$B!J@G6b(B=0$B!K(Bの投資資金ΔIMONEYが誘発され、その結果、消費財ΔC(=ΔCMONEY)の生産とは別に、資本財ΔI(=ΔIMONEY)が生産される。」という命題は正しいだろうか。これは、不況のときには成り立たない。この理由は、消費財Cと資本財Iとは財貨の種類が違うからである。不況のときには、消費財と資本財に対する設備は、人員を含めて過剰設備となっており、定額支出金ΔCMONEYはその年に貯蓄に回らないという仮定をしても、支出金ΔCMONEYは消費財ΔCに変り得るが、資本財ΔIは新規に生まれないのである。なお、翌年に、ΔCが減少すれば、財貨の生産状況は元に戻り、借入金ΔCMONEYだけが残る。

$B!!$3$NItJ,$NO@M}$OHs>o$K=EMW$G$"$k!#(B(a)$B$[$\40A48[MQ>uBV$K$*$$$F(B$B!"(B(b)$B;qK\:b(BI$B$KBP$9$k@_Hw$,2a>j@_Hw$G$J$/!"(B(c)$B;:6H$N=cMx1W$,J?6QE*$K9u;z$G!"(B(d)$B8x6&;qK\:b$,;:6H8zN($KM-8z$KLrN)$C$F$*$j!"(B(e)$B6bM;5!4X$NJ]M-;q;:$,7rA4$G$"$k>l9g$K$*$$$F!"L14V>CHq:b$N(B$B<+$B$O?75,;qK\:b(BΔIMONEY$B$NM6H/F05!$H$J$j!"6d9T$h$j4k6H$KAOB$;q6b(BΔIMONEY$B$N6!5k$,$J$5$l$l$P!"(BΔIMONEY$B$O:b2_(BΔI$B$KE>2=$9$k!#$=$7$F!"(B$B$=$NE>2=$ND>8e$K!J$"$k$$$O!"F1;~?J9T$G!K(B$BDB6b$NA}J,(B$B$,8B3&CyC_@-8~$,Dj?t$H$7$F0];}$5$l$kJ,$@$1A}2C$5$l$l$P!"(BGDP$B$,A}(B$B2C$9$k!#DB6b$NA}2C$,$J$5$l$J$1$l$P!"$9$0$K;qK\:b@_Hw$O2a>j$H$J$k!#DcDB6b5a?&l9g$O!"KtJL$N8=>]$,5/$-$k!#!!!!!!!!!J(B$BCm0U!*(B$B9`L\(B(25)$B;2>H$N$3$H!#$3$3$NCJMn$NO@=R$O!"B?J,8m$C$F$$$k!#$I$N$h$&$J(B$B@/I\;Y=P!J:DL3D62a5_:Q$r=|$/!K(B$B$b!"7k6I$O>CHq:b(B+$BEj;q:b!a;:6H3&$K$h$kH/@8(BGVA$B!"$K2s$j!"G/EYFb$G$N7P:Q8z2L$OF1$8$G$"$k!#7J5$!"IT7J5$$KBP$9$k8z2L$H$7$F$O!"$=$N;Y=P$K$h$C$F;:=P$5$l$kEj;q:b$,$=$N8e$N7J5$!"IT7J5$$KG!2?$K1F6A$9$k$+$H$$$&LdBj$K$9$jBX$k!#Nc$($P!"0eNEJd=u$NEj;q@-8~J,$O!"LtIJ4k6H!"0eNE4X78C$5$l$l$P650i5!4X$N!">CHq$K2s$l$P>CHq:b;:6H$N!"CyC_$K2s$l$P!"6d9TM;;q$rDL$8$FITFCDj;:6H$N;qK\:b$K2s$k!#3t<0Ej;q$K8~$1$i$l$l$P!"!J8:2A=~5Q$N$J$$!K3t2A$N>e>:$K2s$k!#;Y=P$N8B3&>CHq@-8~J,$N7P:Q2ACM$O!"2H7W$K$*$1$k>CHq:b2_$NLG<:$K$h$C$FG/EYFb$KLG<:$9$k$,!"6PO+$8$k!#(B2010/9/24)$B!#(B

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$B!!(B日本国で、累積国債発行額が異常に膨れ上がった原因は、大きく二つある。一つは、投資乗数効果を基礎とするケインズ有効需要原理$B!JM-8z<{MW$N86M}!K(B理論が本来、政府による失業救済のための理論であったにも関わらず、日本国では、その目的を超えて、その理論が$B$"$k;~4|$+$i!"(B(1)経済発展と、(2)経済不況克服と、(3)内需拡大のための基礎理論として適用され$B$k$h$&$K$J$C$?(B。そして、何ということか、実は、この理論を支える基本式そのものが誤っていたのだ。しかしながら、この基本式の誤りは世界中で共通である。日本国のこの異常事態は、或る理論をその理論の適用範囲を超えて適用してしまったという政策上の誤りから生じたというよりは、或る思想を正しいと信じこんだら、懐疑を含む多方面からの議論を一切許さない一途な国民性から生じたものであると思う。

$B!!(Bこの主題に関しては、次の事項が関係する。1971年、米国の変動為替相場制採用と1973年第1次石油危機から生じた不況対策。1980年代の対米自動車輸出の急増に伴う日米貿易摩擦問題の深刻化。1990年、日米構造協議における日本国の内需拡大策の表明(翌年度より、10年間で430兆円の公共投資を約束)。1991年から始まったバブル経済の破綻から生じた大不況に対処するための公共投資。

$B!!(Bなお、現在(2006)、国の公共事業支出は既に、バブル経済が始まる前の規模に戻っている。従って、ケインズ投$B;q>h?t8z2L<0$N8m$j$K$h$k7P:Q4m5!LdBj$O!"9q:D$N856bJV:QLdBj$rJL$K$9$l$P!"4{$K=*$o$C$F$$$k!#(B4$B>r8x:D$NH/9T3[$O8=:_(B250$BC{1_DxEY!"$=$NH>J,6a$/$O!"%P%V%kGK$?$sA0$KH/9T$5$l$F$$$k!#8=:_$NF|K\9q$N7P:Q4m5!$K4X$9$kLdBj$O!"8x6&Ej;q$G$O$J$/!"(B$B8x6&>CHq(B$B$G$"$k!#FCNc8x:D$OJ?@.(B8$BG/$4$m(B(70$BC{1_DxEY(B)$B$+$i5^7c$KA}Bg$7!"8=:_(B450$BC{1_$^$G$KKD$l>e$,$C$F$$$k!#(B

$B!!8x6&>CHq$NLdBj$H$O!"(B典型的な消費支出(現在の1年間に発生する財貨とサービス価値の滅失)である年間の$B@/I\(B社会保障費用を現在の$B@G<}(B($BcIiC4$r4^$`(B)の範囲内に収めず、その結果として、その$B:b@/(B欠損額は、国民の蓄積貯蓄の再投資回収(売上げによる投資回収)が期待できない費消となったことである。

$B!!(Bこの誤りは、日本国における高齢化社会の到来とは本来、無関係であり、この問題は、過去から引き継ぐ誤った経済思想とそれに基づく政策から生じている。この問題はケインズ乗数効果理論とは無関係であり、経済学の大失敗の故である。政治家の無責任は、第2義的なものである。何故なら、政治家と官僚、マスコミを含めて、経済学の理解は経済学者を超えることはないからである。$B$3$N;vBV$rC/$bM=A[$G$-$J$+$C$?$N$G$"$k$+$i!"<:GT$H$O$$$($J$$$,!">/$J$/$H$bLdBj$,82Cx$K$J$j;O$a$F$+$i$O;j5^$K7P:QJ}?K$rJQ99$9$Y$-$G$"$C$?!#(B

$B!!(B何故、「過去の世代の年金費用を現在と未来の世代が負担するべきである」という経済思想が経済学の中で長く続いていたのであろうか。$B$=$l$rG/6b@)EY@.N)$NNr;KE*$JM3Mh$N8N$H$9$k$N$O3XLd$NJ|4~$G$"$k!#L5=~$NG/6b$H$O!"(B$B@o;`73?M(B$B2HB2!"(B$B@o=}73?M(B$B!"(B$BB`Lr73?M(B$B$NLLE]$r8=Lr@$Be$,$_$k$?$a$N$b$N$G$"$k!#0lHL?M$N@83h$rL?$r$+$1$Fc$9$k$b$N$G$"$C$F!"DL>o?M$NL?$d@83h$rL5=~$Go?M$O!"@8$-$F$$$k4V!"<+J,C#$NF1@$BeF1;N$,!"2HB2$,!"M-=~$G=u$19g$&$Y$-$b$N$G$"$k!#7h$7$F!";R6!$d!"@8$^$l$F$$$J$$?M$,K4$/$J$C$?8+CN$i$L?M$N@83h$r;Y$($k$Y$-$b$N$G$O$J$$!#(B

$B$5$i$K!"(B「現在の人々の命の価値は、現在と将来の人々の生活(即ち、命)を脅かすほどのものであってはならない」という当たり前の考えを経済学者は何故叫んでこなかったの$B$G$"(Bろうか。経済学者は、経済$B3X>e$N(B真理の$BC55a$H(B主張に責任がある。経済学者は、大衆に迎合する必要はない。

$B!!(B国民経済計算におけるケインジアン3勘定システムによれば、法人を含む人々による現在の年次投資は、現在のその人々の年次貯蓄(gross)によるものである。過去の投資の今年度分投資回収額(借入金返済額)は、過去に投資した人々が全額受け取っており、投資していなかった人々は誰も受け取っていない。人の命を扱う医療費は、国の命を扱う軍事費という消費(年度内の生産物の$B2ACM$N(B消滅)と同じ経済的意味を持つもの$B$G$"$k(B。そして、全ての生物にとって、今一瞬より先の未来の生存を保証する原理は何も存在しない。子孫の生命よりも、自身の生命を優先する生物は存在しない。

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(1) John Maynard Keynes, "The General Theory of Employment, Interest and Money", 1997, GREAT MINDS SERIES, Prometheus Books.$B!!K.Lu!!!V8[MQ!&Mx;R$*$h$S2_J>$N0lHLM}O@!W!$1vLnC+M40l!$ElMN7P:Q?7Js(2) James C. W. Ahiakpor, "On the Mythology of the Keynesian Multiplier", http://www.geocities.com/ecocorner/intelarea/jmk7.html

(3) Jochen Hartwig, "Trying to Make Sense of the Principle of Effective Demand", the seventh international post Keynesian workshop, 2002; URL,  Trying to Make Sense of the Principle of Effective Demand.

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