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CHAPTER 10
General Equilibrium and
Welfare
A. Summary
This chapter provides a very elementary introduction to general equilibrium
theory. It begins by showing why taking a general equilibrium approach may
be necessary to address some important economic questions and then pro-
ceeds to build a simply model of two markets. That model (drawn primarily
from the graphical approach to international trade theory) generalizes “sup-
ply” by using the production possibility frontier and “demand” by using a
typical person’s indifference curve. An advantage of this approach is to
stress that the economic “problem” is how to make the best (utility-
maximizing) use of scarce resources.
The middle portion of the chapter is devoted to showing the “first theo-
rem of welfare economics” (that perfectly competitive prices, under certain
circumstances, yield economic efficiency). Again this is done using the pro-
duction possibility frontier and indifference curves to show how the opera-
tions of markets cause the economy to hone in on the efficient point.
Reasons why the first theorem may fail are discussed in the third section
of the chapter. Subjects given very brief treatment include: (1) Imperfect
competition; (2) Externalities; (3) Public goods; and (4) Imperfect infor-
mation. Each of these topics is covered in considerable detail in later chap-
ters. The discussion here also includes a brief discussion of equity and of
how goals of equity and efficiency may sometime (but by no means always)
be in conflict. The Edgeworth Box Diagram is the primary tool used for this
purpose.
The chapter concludes with a brief discussion of how money enters into
general equilibrium models. The main goals here are: (1) to introduce the
“classical dichotomy” between monetary and real sectors; and (2) to illustrate
the notion of fiat money and why this innovation has important economic
implications.
154
Chapter 12: General Equilibrium and Welfare 155
b. See Graph
c. The production possibility frontier is the set of food and cloth outputs that sat-
isfy both constraints (see graph).
d. The frontier is concave because the two goods use differing factor proportions.
The slope changes as a different input becomes the binding constraint.
e. The constraints intersect at F = 50. For F < 50 the slope of the frontier is -1.
P
Hence, in this range, F = 1 . For 50 < F < 75 the slope of the frontier is -2
PC
P
(because land is the binding constraint). In this range therefore F = 2 .
PC
PF 5
f. With these preferences, = .
PC 4
g. Any price ratio between 1.0 and 2.0 will cause production to occur at the kink
in the frontier.
h. This capital constraint lies always outside the previous production possibility
frontier. It will not therefore affect any of the calculations earlier in this prob-
lem.
b. If Y = 2 X , X 2 + 2(2 X ) 2 = 900
2
9X = 900; X = 10, Y = 20. This point is shown on the frontier in part a.
c. If X = 9 on the production possibility frontier,
Y = 819 / 2 = 20.24
Given H = 16, U = 4F¼ C¼ and we know that optimality will require C = F since the
goods enter both the utility function and the production possibility frontier symmetri-
2
cally. Since C = F, have 2C = 8 or C = F = 2. Utility = 4 2.
10.5 a. Given the production conditions, the production possibility frontier will be a
straight line with slope - 3/2. Hence the price ratio in this economy must be
PX 3 X Y
= . The equation for the frontier is + = 20 .
PY 2 2 3
3 5 8
b. Using the hint, X S = XJ = XT =
PX PX PX
12
Similarly YT = . Substituting these into the equation for the frontier and us-
PY
2P 4 4 10 1 1
ing the fact that PY = X yields + = = 20 PX = ; PY = . Notice
3 Px PY PX 2 3
how setting the wage here also sets the absolute price level.
158 Chapter 12: General Equilibrium and Welfare
c. With these prices, total demand for X is 16, total demand for Y is 36. Hence 12
hours of labor must be devoted to Y production, 8 hours to X.
10.6 a. For region A the production possibility frontier is X A2 + YA2 = 100 . For region
B it is X B2 + YB2 = 25 . Hence the frontiers are concentric circles with radius 10
for A and 5 for B.
b. Production in both regions must have the same slope of the production possi-
bility frontier. In this case that means that the ratio X/Y must be the same in
both regions – production must take place along a ray through the origin.
c. The geometry of this situation suggests that for efficiency
X A = 2 X B YA = 2YB . Hence X T = 3 X B YT = 3YB and the frontier is given
by X T2 + YT2 = 9( X B2 + YB2 ) = 225 . If X T = 12 YT = 9 .
10.7 a. U1 = 10 U 2 = 5 .
F2
b. F1 = which implies F1 = 40 F2 = 160 .
4
c. The allocation in part a achieves this result --
F1 = F2 = 100 U1 = 10 U 2 = 5 .
d. A natural suggestion would be to maximize the sum of utilities. This would
1 1
require that marginal utilities be equal. Because MU1 = MU 2 =
2 F1 4 F2
equality of marginal utilities requires F1 = 4 F2 F1 = 160; F2 = 40 -- a rather
unequal distribution. Still the sum of utilities is 15.8 – the largest possible.
With an equal allocation the sum of utilities, for example, is 15.0.
10.8 a. The total value of transactions is 20w. So, money supply = 60 = money de-
mand = 5w. So w = 12 (earlier we assumed w = 10 ) So the absolute prices
1 12 1 12
should be changes as:. PX = = 0.6 PY = = 0.4 .
2 10 3 10
b. If the money supply increases to 90, all wages and prices increase by 50 per-
cent: w = 18, PX = 0.9, PY = 0.6 . Relative prices and the overall allocation of
resources remain the same. Yes, this economy exhibits the classical dichoto-
my.
Chapter 12: General Equilibrium and Welfare 159
10.10 a. The preferences of Smith and Jones are shown in the figure. The only ex-
change ratio that can prevail is set by Jones’ preferences – 1C must trade for
0.75H. On the other hand, all efficient allocations must lie along the main di-
agonal of the box where, because of Smith’s preferences, C = 2H.
b. This is an equilibrium – the allocation lies on the contract curve and any trade
would make at least one person worse off.
c. Now the initial position is off the contract curve. Smith has 20“extra” H. If
Jones gets all the gains from trade because Smith gives these to him/her, utility
will increase from U J = 4(40) + 3(120) = 520 to U J = 4(60) + 3(120) = 600 . If
Smith gets all the gains from trade, the new equilibrium requires
4 H + 3C = 520 and C = 2 H . Hence, the equilibrium requires Jones to get H =
52, C = 104. Smith gets H = 48, C = 96 and is much better off than at the ini-
tial allocation. Smith may be able to enforce this equilibrium or, if he/she is
especially strong may in fact take everything.
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XVIII.
FORAGE for the horses and mules, and rations for the men,
sufficient of both to last thirty days, having been loaded on the
wagons, the entire command, composed as previously stated, and
accompanied by General Sheridan and staff, left Camp Supply early
on the morning of December 7, and turning our horses’ heads
southward, we marched in the direction of the battle-ground of the
Washita. Our march to the Washita was quiet and uneventful, if we
except the loquacity of California Joe, who, now that we were once
more in the saddle with the prospect of stirring times before us,
seemed completely in his element, and gave vent to his satisfaction
by indulging in a connected series of remarks and queries, always
supplying the answer to the latter himself if none of his listeners
evinced a disposition to do so for him. His principal delight seemed
to be in speculating audibly as to what would be the impression
produced on the minds of the Indians when they discovered us
returning with increased numbers both of men and wagons.
“I’d jist like to see the streaked count’nances of Satanta,
Medicine Arrow, Lone Wolf, and a few others of ’em, when they
ketch the fust glimpse of the outfit. They’ll think we’re comin’ to
spend an evenin’ with ’em sure, and hev brought our knittin’ with us.
One look’ll satisfy ’em thar’ll be sum of the durndest kickin’ out over
these plains that ever war heern tell uv. One good thing, it’s goin’ to
cum as nigh killin’ uv ’em to start ’em out this time uv year as ef we
hed an out an’ out scrummage with ’em. The way I looks at it they
hev jist this preference: them as don’t like bein’ shot to deth kin take
ther chances at freezin’.” In this interminable manner California Joe
would pursue his semi-soliloquies, only too delighted if some one
exhibited interest sufficient to propound an occasional question.
As our proposed route bore to the southeast after reaching the
battle-field, our course was so chosen as to carry us to the Washita
river a few miles below, at which point we encamped early in the day.
General Sheridan desired to ride over the battle-ground, and we
hoped by a careful examination of the surrounding country to
discover the remains of Major Elliott and his little party, of whose fate
there could no longer be the faintest doubt. With one hundred men of
the Seventh Cavalry, under command of Captain Yates, we
proceeded to the scene of the battle, and from there dispersed in
small parties in all directions, with orders to make a thorough search
for our lost comrades. We found the evidences of the late
engagement much as we had left them. Here were the bodies, now
frozen, of the seven hundred ponies which we had slain after the
battle; here and there, scattered in and about the site of the former
village of Black Kettle, lay the bodies of many of the Indians who fell
during the struggle. Many of the bodies, however, particularly those
of Black Kettle and Little Rock, had been removed by their friends.
Why any had been allowed to remain uncared for, could only be
explained upon the supposition that the hasty flight of the other
villages prevented the Indians from carrying away any except the
bodies of the most prominent chiefs or warriors, although most of
those remaining on the battle-ground were found wrapped in
blankets and bound with lariats preparatory to removal and burial.
Even some of the Indian dogs were found loitering in the vicinity of
the places where the lodges of their former masters stood; but, like
the Indians themselves, they were suspicious of the white man, and
could hardly be induced to establish friendly relations. Some of the
soldiers, however, managed to secure possession of a few young
puppies; these were carefully brought up, and to this day they, or
some of their descendants, are in the possession of members of the
command.
After riding over the ground in the immediate vicinity of the
village, I joined one of the parties engaged in the search for the
bodies of Major Elliott and his men. In describing the search and its
result, I cannot do better than transcribe from my official report,
made soon after to General Sheridan:
“After marching a distance of two miles in the direction in which
Major Elliott and his little party were last seen, we suddenly came
upon the stark, stiff, naked, and horribly mutilated bodies of our dead
comrades. No words were needed to tell how desperate had been
the struggle before they were finally overpowered. At a short
distance from where the bodies lay, could be seen the carcasses of
some of the horses of the party, which had probably been killed early
in the fight. Seeing the hopelessness of breaking through the line
which surrounded them, and which undoubtedly numbered more
than one hundred to one, Elliott dismounted his men, tied their
horses together, and prepared to sell their lives as dearly as
possible. It may not be improper to add that in describing, as far as
possible, the details of Elliott’s fight I rely not only upon a critical and
personal examination of the ground and attendant circumstances,
but am sustained by the statements of Indian chiefs and warriors
who witnessed and participated in the fight, and who have since
been forced to enter our lines and surrender themselves up, under
circumstances which will be made to appear in other portions of this
report.
“The bodies of Elliott and his little band, with but a single
exception, were found lying within a circle not exceeding twenty
yards in diameter. We found them exactly as they fell, except that
their barbarous foes had stripped and mutilated the bodies in the
most savage manner.
“All the bodies were carried to camp. The latter was reached
after dark. It being the intention to resume the march before daylight
the following day, a grave was hastily prepared on a little knoll near
our camp, and, with the exception of that of Major Elliott, whose
remains were carried with us for interment at Fort Arbuckle, the
bodies of the entire party, under the dim light of a few torches held
by of sorrowing comrades, were consigned to one common resting
place. No funeral note sounded to measure their passage to the
grave. No volley was fired to tell us a comrade was receiving the last
sad rites of burial, that the fresh earth had closed over some of our
truest and most daring soldiers.
“Before interment, I caused a complete examination of each
body to be made by Dr. Lippincott, chief medical officer of the
expedition, with direction to report on the character and number of
wounds received by each, as well as to mutilations to which they had
been subjected. The following extracts are taken from Dr.
Lippincott’s report:
“Major Joel H. Elliott, two bullet holes in head, one in left cheek,
right hand cut off, left foot almost cut off, ... deep gash in right groin,
deep gashes in calves of both legs, little finger of left hand cut off,
and throat cut.
“Sergeant-Major Walter Kennedy, bullet hole in right temple,
head partly cut off, seventeen bullet holes in back, and two in legs.
“Corporal Harry Mercer, Troop E, bullet hole in right axilla, one in
region of heart, three in back, eight arrow wounds in back, right ear
cut off, head scalped, and skull fractured, deep gashes in both legs,
and throat cut.
“Private Thomas Christer, Troop E, bullet hole in head, right foot
cut off, bullet hole in abdomen, and throat cut.
“Corporal William Carrick, Troop H, bullet hole in right parietal
bone, both feet cut off, throat cut, left arm broken.
“Private Eugene Clover, Troop H, head cut off, arrow wound in
right side, both legs terribly mutilated.
“Private William Milligan, Troop H, bullet hole in left side of head,
deep gashes in right leg, ... left arm deeply gashed, head scalped,
and throat cut.
“Corporal James F. Williams, Troop I, bullet hole in back; head
and both arms cut off, many and deep gashes in back....
“Private Thomas Dooney, Troop I, arrow hole in region of
stomach, thorax cut open, head cut off, and right shoulder, cut by a
tomahawk.
“Farrier Thomas Fitzpatrick, Troop M, bullet hole in left parietal
bone, head scalped, arm broken, ... throat cut.
“Private John Myres, Troop M, several bullet holes in head,
scalped, nineteen bullet holes in body, ... throat cut.
“Private Cal. Sharpe, Troop M, two bullet holes in right side,
throat cut, one bullet hole in left side of head, one arrow hole in left
side, ... left arm broken.
“Unknown, head cut off, body partially destroyed by wolves.
“Unknown, head and right hand cut off, ... three bullet and nine
arrow holes in back.
“Unknown, scalped, skull fractured, six bullet and thirteen arrow
holes in back, and three bullet holes in chest.”
I have quoted these extracts in order to give the reader an
insight of the treatment invariably meted out to white men who are so
unfortunate as to fall within the scope of the red man’s bloodthirsty
and insatiable vengeance. The report to General Sheridan then
continues as follows:
“In addition to the wounds and barbarities reported by Dr.
Lippincott, I saw a portion of the stock of a Lancaster rifle protruding
from the side of one of the men; the stock had been broken off near
the barrel, and the butt of it, probably twelve inches in length, had
been driven into the man’s side a distance of eight inches. The forest
along the banks of the Washita, from the battle-ground a distance of
twelve miles, was found to have been one continuous Indian village.
Black Kettle’s band of Cheyennes was above; then came other
hostile tribes camped in the following order: Arrapahoes under Little
Raven; Kiowas under Satanta and Lone Wolf; the remaining bands
of Cheyennes, Comanches, and Apaches. Nothing could exceed the
disorder and haste with which these tribes had fled from their
camping grounds. They had abandoned thousands of lodge poles,
some of which were still standing, as when last used. Immense
numbers of camp kettles, cooking utensils, coffee-mills, axes, and
several hundred buffalo robes were found in the abandoned camps
adjacent to Black Kettle’s village, but which had not been visited
before by our troops. By actual examination, it was computed that
over six hundred lodges had been standing along the Washita during
the battle, and within five miles of the battle-ground, and it was from
these villages, and others still lower down the stream, that the
immense number of warriors came who, after our rout and
destruction of Black Kettle and his band, surrounded my command
and fought until defeated by the Seventh Cavalry about 3 P. M. on
the 27th ult.... In the deserted camp, lately occupied by Satanta with
the Kiowas, my men discovered the bodies of a young white woman
and child, the former apparently about twenty-three years of age, the
latter probably eighteen months old. They were evidently mother and
child, and had not long been in captivity, as the woman still retained
several articles of her wardrobe about her person—among others a
pair of cloth gaiters but little worn, everything indicating that she had
been but recently captured, and upon our attacking and routing
Black Kettle’s camp her captors, fearing she might be recaptured by
us and her testimony used against them, had deliberately murdered
her and her child in cold blood. The woman had received a shot in
the forehead, her entire scalp had been removed, and her skull
horribly crushed. The child also bore numerous marks of violence.”
At daylight on the following morning the entire command started
on the trail of the Indian villages, nearly all of which had moved down
the Washita toward Fort Cobb, where they had good reason to
believe they would receive protection. The Arrapahoes and
remaining band of Cheyennes left the Washita valley and moved
across in the direction of Red river. After following the trail of the
Kiowas and other hostile Indians for seven days, over an almost
impassable country, where it was necessary to keep two or three
hundred men almost constantly at work with picks, axes, and
spades, before being able to advance with our immense train, my
Osage scouts came galloping back on the morning of the 17th of
December, and reported a party of Indians in our front bearing a flag
of truce.
It is to this day such a common occurrence for Indian agents to
assert in positive terms that the particular Indians of their agency
have not been absent from their reservation, nor engaged in making
war upon the white men, when the contrary is well known to be true,
that I deem it proper to introduce one of the many instances of this
kind which have fallen under my observation, as an illustration not
only of how the public in distant sections of the country may be
misled and deceived as to the acts and intentions of the Indians, but
also of the extent to which the Indian agents themselves will proceed
in attempting to shield and defend the Indians of their particular
agency. Sometimes, of course, the agent is the victim of deception,
and no doubt conscientiously proclaims that which he firmly believes;
but I am forced by long experience to the opinion that instances of
this kind are rare, being the exception rather than the rule. In the
example to which I refer, the high character and distinction as well as
the deservedly national reputation achieved by the official then in
charge of the Indians against whom we were operating, will at once
absolve me from the imputation of intentionally reflecting upon the
integrity of his action in the matter. The only point to occasion
surprise is how an officer possessing the knowledge of the Indian
character, derived from an extensive experience on the frontier,
which General Hazen could justly lay claim to, should be so far
misled as to give the certificate of good conduct which follows.
General Hazen had not only had superior opportunities for studying
the Indian character, but had participated in Indian wars, and at the
very time he penned the following note he was partially disabled
from the effects of an Indian wound. The Government had selected
him from the large number of intelligent officers of high rank whose
services were available for the position, and had assigned him with
plenary powers to the superintendency of the Southern Indian
District, a position in which almost the entire control of all the
southern tribes was vested in the occupant. If gentlemen of the
experience and military education of General Hazen, occupying the
intimate and official relation to the Indians which he did, could be so
readily and completely deceived as to their real character, it is not
strange that the mass of the people living far from the scene of
operations, and only possessing such information as reaches them
in scraps through the public press, and generally colored by
interested parties, should at times entertain extremely erroneous
impressions regarding the much-vexed Indian question. Now to the
case in point:
With the Osage scouts who came back from the advance with
the intelligence that a party of Indians were in front, also came a
scout who stated that he was from Fort Cobb, and delivered to me a
despatch, which read as follows: