Allsb ook, Odgen O.
A icle
Ra ional Expec a ions and C owding-Ou
K edi und Kapi al
P o ided in Coope a ion wi h:
Duncke & Humblo , Be lin
Sugges ed Ci a ion: Allsb ook, Odgen O. (1986) : Ra ional Expec a ions and C owding-Ou , K edi und
Kapi al, ISSN 0023-4591, Duncke & Humblo , Be lin, Vol. 19, Iss. 2, pp. 248-251,
h ps://doi.o g/10.3790/ccm.19.2.248
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Ra ional Expec a ions and C owding-Ou
By Ogden O. Allsb ook, J ., A hens, Geo gia
The no ion o i ually pe ec compe i ion has gained enascence by he
ma ke clea ing assump ion o a ional expec a ions in mac oeconomic
heo y. In all he li e a u e on a ional expec a ions, he e appea s o be one
lacuna: he appa en ly simple ask o hypo hesizing a ional expec a ions in
an IS - LM model has no been cas . No doub he ask is less impo an han
es ing he hypo hesis agains he da a, and no doub he ask is complica ed
by he s a ic se ing o IS - LM, bu no doub such an expe imen could
e eal some posi i e and nega i e aspec s o bo h a ional expec a ions and
Keynesian o hodoxy.1 I is ou ask he e o a emp such exposi ion by
ansla ing one o he p edic ions inhe en in he s ong assump ion o e i-
cien use o su icien in o ma ion in o IS - LM. Tha p edic ion is ha mon-
e a y policy, p ope ly cas , leads o a change in he composi ion o ou pu , o
c owding-ou .
U ilizing he o hodox IS - LM amewo k, we mus eo de he demand
o money o con o m o a ional expec a ions. One way o doing his is o
assume ha as in e es a es decline, he specula i e demand o money
declines. While Keynesians in e p e a all in in e es o mean a highe p ob-
abili y ha u he in e es declines become less likely so mo e eal balances
should be held quiescen , he a ional expec a ions g oup in e p e a all in
in e es as mone a y policy becoming mo e expansi e, and he e becomes an
inc easing p obabili y ha p ices o commodi ies and in e es a es will
inc ease. On he basis ha a all in in e es is he signal o (in la iona y)
money g ow h, agen s would oll cash om idle o ac i e belances o spend-
ing. They do his in an icipa ion o bo h in la ion in commodi y p ices and
an inc ease in he s ock o money wi h which hey may eplace hei
deple ed s ock o specula i e balances. Veloci y inc eases. In his case we
assume a consensus o in o med opinion suddenly exis s, and he e is no lag
dis ibu ion among agen s o lowe in e es a es. Specula ion shi s o he
1 Fo a su ey o he bu geoning li e a u e, see Begg [1982, pp. 266 - 284]. Al hough
he equa ions a e desc ibed in a modi ied manne , sund y au ho s do no depic he
condi ions in o hodox Keynesian geome y. See
Sa gen
and
Wallace,
[1975, pp.242-
244].
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DOI h ps://doi.o g/10.3790/ccm.19.2.248 | Gene a ed on 2023-01-16 12:52:50
Ra ional Expec a ions and C owding-Ou 249
posi i e p obabili y o commodi y p ices ising a he han o bond p ices
ising. The slope o he specula i e demand o money cu e becomes posi-
i e, and he LM slope hus becomes nega i e.
In he pu es case, he IS cu e would be e ical, e lec ing he nea
maximiza ion o eal ou pu in equilib ium. Howe e , as open ma ke ope -
a ions o buy bonds d i e in e es a es down, a ansi o y disequilib ium
be ween IS and LM occu s, and he pe e se e ec o a all in in e es a es
aises eal spending and ou pu empo a ily by he expansiona y gap "ab"
in Figu e I. This gap is s ic ly ansi o y.
As agen s ac on he mone a y in o ma ion, hey spend idle balances and
eal ou pu ises, bu he inc eased supply o money om bo h he inc eas-
ing s ock and a p io ise in eloci y will shi he mone a y agg ega es om
LMi o LM2. AS soon as all desi ed specula i e balances ha e been spen ,
he e is no u he mo emen along he LMX cu e, and he shi o LM2
e lec s he ise in nominal money s ock. In e es a es which ell om an
ini ial ¿0 o i as open-ma ke pu chases ini ially aised bond p ices, ha e
now isen o ¿1 as money g ow h expec a ions a e ealized. In equilib ium,
eal g ow h is neu alized, bu in e es a es a e highe , e lec ing he
decline in eal balances ia he ise in commodi y p ices and in e es a es.
The highe in e es a es do no e lec a change ei he in he eal (in la ion-
adjus ed- ) o he na u al (Wicksellian-n*) a es o in e es , bu he decline
in demand o eal balances is analogous in e ec o a change in he sa ing
a io. Real balances a e pa o pa cel o sa ings, so he sa ing a io
declines, he consump ion a io ises and he in es men a io alls. In Fig-
IS
y
Figu e 1
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DOI h ps://doi.o g/10.3790/ccm.19.2.248 | Gene a ed on 2023-01-16 12:52:50
250 Ogden O. Allsb ook, J .
u e 1 nominal in e es a es (i) a e a p oxy o p ices. The all in in e es
om ¿0 o i is a Keynes e ec , and he ise in in e es o ii is a Fishe e ec .
The gap be ween he na u al a e (n*) and he nominal a e (¿1), which is
highe , e lec s c owding-ou .
Ra ional expec a ions wi hin IS - LM denies Keynesian o hodoxy o he
powe o o ge a liquidi y ap wi h a loo a e o in e es which emascu-
la es mone a y policy. I onically, he a ional expec a ions assump ion
ansmog i ies mone a y policy om ano he an age, which is ha mana-
ge s o managed money and po olio holde s bo h ag ee on he in luence o
he quan i y o money as he sole ins umen o mone a y policy on ou pu
and p ices. While he neu ali y o money p e ails in an agg ega e sense, i
does no p e ail in a dis ibu i e sense.
Re e ences
Begg, D. K. H., The Ra ional Expec a ions Re olu ion in Mac oeconomics (Bal i-
mo e: Johns Hopkins Uni e si y P ess, 1982). - Sa gen , T. J., and Neil Wallace, "Ra-
ional Expec a ions, he Op imal Mone a y Ins umen , and The Op imal Money Sup-
ply Rule." Jou nal o Poli ical Economy. 1975 - 83, 241 - 254.
Zusammen assung
Ra ionale E wa ungen und C owding-ou
Diese Au sa z o mulie die Geome ie des IS-LM-Modells neu, indem a ionale
E wa ungen einge üh we den. In einem solchen Modell bewi k Geldpoli ik
C owding-ou , also eine Ve d ängung des p i a en Sek o s. Dami üh en die Annah-
men on a ionalen E wa ungen, expansi e Geldpoli ik und e inge e Nach age
nach Realkasse zu eine Abnahme de Spa - und de In es i ionsquo e und eine
Zunahme de Konsumquo e. Es zeig sich also, daß es eine Nich -Neu ali ä des Gel-
des in bezug au die Ve eilung und Zusammense zung de Gesam nach age gib .
Summa y
Ra ional Expec a ions and C owding-Ou
This pape eo de s he IS - LM geome y o include a ional expec a ions. When
mone a y policy is hen applied, he e ec is one o c owding-ou . Hence, he assump-
ions o a ional expec a ions, expansiona y mone a y policy, and educed demand
o eal balances leads o educed sa ing and in es men a ios and an inc eased con-
sump ion a io. I is hus he case ha non-neu ali y o money in a dis ibu ional o
composi ional sense exis s.
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Ra ional Expec a ions and C owding-Ou 251
Résumé
A en es a ionnelles e c owding-ou
L'au eu de ce a icle inclu des a en es a ionnelles dans la géomé ie de IS-LM.
L'e e d'une poli ique moné ai e es celui d'un c owding-ou . Les hypo hèses
d'a en es a ionnelles, de poli ique moné ai e expansionnis e e de demande édui e
de balances éelles conduisen à une éduc ion de l'épa gne e des aux d'in es isse-
men ainsi qu'à une augmen a ion de la consomma ion. La monnaie n'es donc pas
neu e dans un sens de dis ibu ion ou de composi ion.
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DOI h ps://doi.o g/10.3790/ccm.19.2.248 | Gene a ed on 2023-01-16 12:52:50