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Macroeconomics
D. N. Dwivedi
Former Professor of Economics
Maharaja Agrasen Institute of Management Studies
Delhi
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While evolving the content and organisation of fifth edition of
Macroeconomics, the prime objective of prior editions to offer a
comprehensive and authentic textbook on macroeconomics is retained. The
scope of this book is planned by taking a comprehensive review of the
syllabi of macroeconomics recommended by UGC and the Indian
universities for undergraduate and postgraduate courses. The book meets
the theoretical needs of academicians and policymakers. The extent to
which UG and PG students have perceived the book, appreciation gained by
the subject teachers and recommendations by various Indian universities,
give a strong evidence of the successful efforts laid in its evolution.
However, in dealing with a scientific subject, there is always a scope for
improving methodological approach for presenting the subject matter more
systematically. As such, there are certain significant revisionary changes
made in this edition.
Acknowledgement
I would like to express my deepest appreciation and gratefulness to
McGraw Hill Education for seeking opinion and suggestions of subject
experts for improving the presentation of the book. A special gratitude to
the contribution of the editorial personnel of McGraw Hill. I am also
thankful to numerous Indian and foreign students for emailing their
appreciations of the book. I express my indebtedness to reviewers for their
appreciation, comments, and suggestions for further improvement in the
exposition of subject matter of macroeconomics.
The comments and suggestions from the subject experts, teachers and
students are always welcome.
D. N. Dwivedi
Email: dnd.dwivedi@gmail.com
About the Author
Preface
Part I Introduction
1. Introduction to Macroeconomics
2. Circular Flow Model of the Economy
3. National Income Accounting
Part I Introduction
1. Introduction to Macroeconomics
1.1 What is Macroeconomics
1.2 Macroeconomic Variables
1.3 Macroeconomics as a Theoretical and a Policy Science
1.4 Microeconomics vs. Macroeconomics
1.5 Origin and Growth of Macroeconomics
1.6 Some Basic Concepts and Approaches to Macroeconomic
Analysis
1.7 Macroeconomic Model Building
1.8 Importance of Macroeconomics
1.9 Limitations of Macroeconomics
Suggested Readings
Review and Objective Questions
2. Circular Flow Model of the Economy
2.1 Economy as a Circular Flow of Products and Money
2.2 Circular Flows in the Two-Sector Model
2.3 Circular Flows in Three-Sector Model: A Model with Government
Income and Expenditure
2.4 Circular Flows in Four-Sector Model: A Model with the Foreign
Sector
Suggested Readings
Review Questions
3. National Income Accounting
3.1 Some Concepts Related to National Income
3.2 Different Kinds of Measures of National Income
3.3 Nominal and Real GNP
3.4 Methods of Measuring National Income
3.5 Measurement of National Income in India
3.6 Trends in Some Other Macro Variables in India
Suggested Readings
Review Questions
Introduction
The objective of Part I of the book is to introduce macroeconomics and
to lay down the method of theoretical foundation and basic framework
for the study of macroeconomics. Part I of the book contains three
chapters. Chapter 1 contains a detailed discussion on the introduction
of macroeconomics as a branch of economic science, its origin and
growth, the scope of its subject matter, its comparison with
microeconomics, the macro-variables and analytical concepts used in
macroeconomic analysis, method of building analytical models, and
importance and limitations of macroeconomic theories. Chapter 2
explains the working of the economy and presents graphically the
circular flow of macro-variables, especially products and money. In
Chapter 3, national income accounting has been discussed in detail.
C O
The objective of this chapter is to introduce macroeconomics and to
discuss analytical framework along the following aspects:
• Introduction of macroeconomics as a branch of economics
• A brief account of macroeconomic variables
• Macroeconomics as theoretical and policy science
• Comparison of macroeconomics with microeconomics
• Taking a view of origin and growth of macroeconomics
• The basic concepts and approaches to macroeconomic analysis
• A brief description of model building in macroeconomics
• Importance and limitations of macroeconomics
INTRODUCTION
As is widely known, modern economics has two major branches: (i)
microeconomics and (ii) macroeconomics1. Although economics as a
social science was founded by Adam Smith, the ‘Father of Economics’2, in
his book The Wealth of Nations in 1776, the subject matter of economics
remained confined until 1930s to what is now known as microeconomics.
The economic thoughts and theories propounded by the classical
economists from the days of Adam Smith down to the neo-classical
economists until the Great Depression (1929-1934) was confined to what is
known as microeconomics. Therefore, until the early 1930s, the scope of
economics remained limited to microeconomics. It was in 1936 that John
Maynard Keynes laid the foundation of macroeconomics as a new branch of
economics by writing his revolutionary book The General Theory of
Employment, Interest and Money (1936). The subsequent growth of
literature on the interpretation and elaboration of Keynesian thoughts and
theories and the empirical verification and evaluation of his thoughts and
theories over a period of three decades, culminated in the emergence of
macroeconomics. The subject matter and the scope of macroeconomics
continued to expand further with the counter-criticism of Keynesian
theories and methodology and formulation of new macroeconomic theories,
which led to the foundation of post-Keynesian macroeconomics. The prime
objective of this book is to present a comprehensive and authentic
elaboration of the Keynesian and post-Keynesian macroeconomics.
Among the macro variables of the goods market, gross domestic product
(GDP) is the most important macro variable as all the other macro variables
of the goods market, except employment, are the components of GDP. All
the goods-market variables are flow variables in the sense that they are
subject to change over time with change in their determinants. Also, all
goods-market macro variables are interrelated and interdependent. The
interrelationship and interdependence of the macro variables will be
discussed ahead along with the theory of income determination.
In case of macro variables of the money market, aggregate money supply
and aggregate money demand are the two most important macro variables.
The aggregate money supply is determined autonomously by the central
bank of the country and, in the analysis of money market, it is treated to be
a stock variable. But, money demand is treated as a flow variable. Money
demand consists of transaction plus speculative demands for money. The
variable ‘interest rate’ is determined by aggregate money supply and money
demand.
Beside, the macro variables of the goods and money market are also
interrelated and interdependent. Their interrelationship and interdependence
are elaborately discussed and presented graphically and in functional form
in Chapter 17. It may be noted here that the analysis of the interaction
between macro variables of goods and money market makes a very
important contribution to macroeconomics, known as IS-LM model. The
interaction between the goods market and money market variables
determines the level of the ultimate target variables: (i) economic growth,
(ii) general price level, and (iii) balance of payments.
1.3 MACROECONOMICS AS A
THEORETICAL AND A POLICY
SCIENCE
As Samuelson and Nordhaus have pointed out, “…macroeconomics is still
an area of great controversy among economists and politicians alike” (op.
cit., p. 381). While some economists consider macroeconomics basically as
a theoretical science, some others consider it as a purely policy science.
This kind of controversy on the nature of macroeconomics raises a
question: Is macroeconomics a theoretical science or a policy science?
Macroeconomics, however, has both theoretical and policy orientations. Let
us now look at theoretical and policy orientations of macroeconomics.
Macroeconomics as a Theoretical Science
Macroeconomics as a theoretical science uses theoretical models to explain
the behaviour and the determination of the equilibrium level of
macroeconomic variables (national output, employment, money supply and
demand, general price level and balance of payments, etc.) and analyses the
nature of relationship between them in a logical way and in an orderly
manner. The most important aspect of macroeconomic theories is that they
provide framework and analytical tools to analyse the macroeconomic
phenomena. Macroeconomic theories that offer theoretical explanation of
the determination of national income, aggregate level of consumption,
saving and investment, employment and growth rate, behaviour of the
general price level, determination of product-and-money market
equilibrium, exchange rate and balance of payments constitute the main
body of theoretical macroeconomics. Macroeconomic theories, though not
perfect, do provide a great deal of understanding of, and insight into, the
working of the economy, and in identifying the factors and forces that cause
adverse or desirable effects on the economy. A clear understanding of
macroeconomic dynamics is a necessary condition for the formulation of
appropriate macroeconomic policies to achieve predetermined goals.
Conclusion
It may be concluded at the end that macroeconomics has both theoretical
and policy orientations. In fact, the origin of macroeconomics can be related
to the search for means and measures to solve such economic problems as
the Great Depression and unemployment. But, for finding out an
appropriate feasible solution to such economic problems, it is indispensable
to develop analytical frameworks and economic models to understand the
working of the economy, and interaction and interdependence of the macro
variables. Any random choice and application of policy measures to solve
big economic problems can do more harm than good to the economy.
Building analytical framework and models represents the theoretical nature
of macroeconomics. However, macroeconomic theories are not abstract
theories: they have been developed on the basis of facts of economic life.
Therefore, macroeconomic theories, though imperfect, have a good deal of
application in policy formulation. In case of macroeconomics, theories and
policies go together.
Micro-Macro Paradoxes
Boulding13 has pointed out the following three important Micro-Macro
Paradoxes:
1. An important paradox pertains to cash holding. If all the individuals
decide to hold a larger amount of cash, the total individual cash
holding increases which decreases the level of transactions. But the
stock of money remains the same for the overall transactions in the
economy as a whole.
2. The second paradox is related to saving and investment. If an
individual saves and invests more, his or her income increases. But
this is not true for the economy as a whole. The reason is if all the
individuals with given incomes decide to save more and more, the
consumption expenditure will decrease by the same amount.
Decrease in consumption expenditure reduces the aggregate demand
for consumer goods. This reduces the prospect for investment. The
aggregate investment may even decrease which will reduce the level
of aggregate income.
3. The third paradox pertains to profit and wages. At micro level, one
tends to accept the proposition that the distribution of national
income between wage incomes and profits depends on the relative
bargaining power of the labour and the employers. According to
Boulding, however, it depends on “a combination of other factors,
the most important of which are decisions of management to invest,
i.e., to accumulate real assets, and the complex of the decision of the
whole society about liquidity preference”. Boulding concludes, “It is
these paradoxes, more than any other factor, which justify the
separate study of the system as a whole, not merely as an inventory
or list of particular items”.
Monetarism: A Counter-Revolution
As mentioned above, the Keynesian economics started showing the signs of
its failure during the 1970s as it failed to provide solution to economic
problems of those days. This raised the doubt about the relevance and
applicability of Keynesian economics to the problems of growth and
stability. A group of economists, called “monetarists”, led by Milton
Friedman claimed that Keynesian theory had failed to predict national
output, price level, rate of employment and unemployment, and interest
rate. The monetarists came out with a new revolutionary thought.
According to the monetarists, the role of money is central to the growth and
stability of national output, not the role of aggregate demand for real output,
as Keynesians believe. In the opinion of the monetarists, money supply is
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the lake to the merciful goodness of that Providence who is "the God of the
fatherless and the widow."
Meanwhile the little vessel was battling with the angry waves in a place
where there was a narrow passage, some fifty yards broad, between two
dangerous shelving sandbanks, well known to the master of the Katharine
and his crew. The sandbanks themselves, as it happened, lay partly under
the lee of one of the little islands which stud the coast near Lachta; and the
current was bearing strong upon the bank upon the leeward. At this moment
the Katharine shipped a large quantity of water; as ill-luck would have it,
the tiller broke, and before the boat's head could be righted she had drifted
upon the edge of the bar of sand, and there she stuck fast. The little bark
would have been overwhelmed by the breakers but for the shelter afforded
by the corner of the island and the shifting of the wind a point or two round
to the north; indeed she was fast filling with water, in spite of the efforts of
the passengers to keep her afloat by bailing. To add to the general confusion
on board, it now turned out that several of the passengers, who had been
drinking at the village inn before starting from Lachta, were fairly
intoxicated, and the rest were sinking down bewildered into the apathy of
despair, so that only Stephen and two of the boatmen had their wits about
them. But though they strove with all their might, they were unable to move
the boat from off the sandbank. At this moment, when the waves were
breaking over the little Katharine, and had already swept off into deep
water one or two hapless passengers, who had lost all heart and courage, a
sail was seen approaching.
It was rather a large vessel, with a gallant crew of some twenty men,
who had been inspecting a portion of the coast. They had seen the perilous
position of old Paul and his boat, and had borne down to his assistance, for
in spite of the terrible raging of the wind and waves the captain could not
see the poor fellows swept away one by one and drowned without at least
making an effort to save them.
The vessel neared the sandbank; but how may she approach close
enough to rescue the unfortunate fellows on board the Katharine? A boat is
lowered from the vessel, and four as gallant Russian sailors as ever
ploughed the fresh waters of Ladoga or the Baltic have rowed up to the
spot; but the strength of two of the crew, added to the exertions of Stephen
and the boatmen of the Katharine, are not sufficient to move the boat from
the firm grasp with which the sand held her keel. They were, therefore,
beginning to relax their efforts, when a second boat, with a crew of six
stout-hearted fellows, neared the bank, and by vigorous efforts reached the
spot in time to reinforce their comrades. Without the loss of a moment, one
of the crew, a fine tall muscular Russian, some six feet five inches high,
stripped off his outer garments, leaped into the sea, and after swimming a
few sharp strokes gained a footing on the sand. This was heavy work
indeed, as the sand was not hard and firm, but mixed with mud and slime;
but the giant strength of the new arrival turned the scale, and after a few
short and sharp heaves the Katharine moved once more. In a few moments
she was afloat again, and taken in tow by the other boat.
And where was Stephen all this time? Worn out with fatigue and cold,
for he had been immersed some two hours in the chilly waves, and standing
in deep water and nearly exhausted by their violence, he had lost his footing
on the slippery bank, and having got in a moment beyond his depth was
vainly attempting to keep his head above water by swimming in his
drenched and dripping clothes, the weight of which in a few minutes more
would have carried him down.
"Oh! Steenie, Steenie!" cried the old boatman, Paul, with a loud voice of
agony, which would make itself heard even above the roaring of the angry
wind and waves; "can none of you save my poor Stephen, the bravest lad
that ever trod a deck! He's gone now; and but for his help this day my boat
would have been lost."
"He's not lost yet!" cried the tall seaman; and, plunging into the waves,
he caught him by the hair of the head just as he was sinking a third time; the
next wave would have carried him fairly down, and his life would have
been gone beyond recall.
It was but the work of a moment for the strong, tall stranger to swim
with the lad towards the boat, which was hovering near; and in another
second the gallant crew had lifted him in over the gunwale and laid him at
the bottom of the boat. As soon as he showed signs of life, and began to
open his eyes, a flask of brandy was applied to his mouth, and he soon
revived. The tall man, too, got in, and leaving two of his crew to help old
Paul to tow the Katharine ashore, he gave the signal to his men, and they
pulled off with all their might in the direction of Lachta. Though the waves
were still running high, yet, fortunately, the wind was astern; so the sharp,
quick strokes of the crew soon brought the boat to a landing-place from
which, a few hours before, poor Stephen had departed in such high spirits,
and with such confidence in Paul's seamanship and the ability of the
Katharine to make the passage.
As soon as the boat came to the sheltered nook where the steps of the
landing-place led up from the sea, Stephen was put ashore, and partly led
and partly carried he reached the cottage of his mother. At the sight of her
son the poor widow burst into a flood of tears, and began to give way to an
agony of joy and grief. A warm bath was soon prepared for her son; and
after the application of some gentle restoratives poor Stephen was able to sit
up and thank his kind preserver, the tall stranger, who, with his two men
behind him, just now lifted up the latch of the cottage-door and had entered
the room.
"Gracious Heaven!" exclaimed the grateful mother; "why, sir, you are in
wet clothes too! Sit down, sir, by the fire, and accept of my humble fare,
while I go and find some of my Steenie's clothes for you to put on, and I dry
those dripping garments."
The tall stranger sat down, and, as the widow left the room, gave his two
followers a hint not to make known to the boy or his mother who he was. In
a few minutes the stranger had retired, and assumed a plain old suit
belonging to the young man whose life he had saved, and was engaged in
eating some hot bacon which the widow had just placed on the table before
him, with many protestations of her eternal gratitude to the saviour of her
son.
"May the King of Heaven, who never turns a deaf ear to the widow's
prayer, mercifully reward you for saving my Steenie's life! It is not many a
sailor, or merchant either, that would have done as you did to-day. Heaven
speed you; and may you never forget that the poor widow of Lachta is
praying for you night and morning, that the Almighty may increase your
store, whenever you are sailing over the stormy sea, or the lakes of Onega
and Ladoga."
The tall stranger was about to rise and depart, when suddenly the door
opened, and a naval officer entered with a crowd of attendants. It was the
captain and mate of the barque which Paul and Steenie had seen in the
offing, and which had sent her boats to the rescue of the Katharine.
"My noble master, may it please your majesty," he said, falling on one
knee, "the Royal Peter has come safe, and she has towed the Katharine too
into the little port of Lachta."
The poor widow fell down upon her knees in astonishment, and faltered
forth her apologies for not having recognized his majesty, and for having
treated him with such apparent disrespect.
"Nay, nay, my good woman," said the czar, smiling, "how could you
know the emperor thus disguised in mud and dirt. But you will know him
henceforth. I shall keep your son's clothes in remembrance of this day; and
when your boy 'Steenie,' as you call him, wakes up from the sound sleep
into which he has fallen, tell him that he will always find a true friend in
Peter Alexovitch."
Our readers when they learn that the foregoing story is founded upon a
plain historical fact—as they will find upon reading for themselves the
"Life of Peter the Great,"—will be grieved to hear that the noble conduct of
the emperor on this occasion cost him his life. He had for a long time
suffered under a chronic internal disease, which none of the court
physicians could effectually combat; and in the month of November, 1724,
in which our story is laid, having gone, contrary to the advice of his
physicians, to inspect the works on Lake Ladoga, his exposure to the wet
and cold, in rescuing the poor ferryman and his crew in the manner related,
affected him so seriously that he never afterwards recovered. The emperor
went home to his palace at St. Petersburg without loss of time, but his
malady increased in spite of all the remedies which the medical skill of
Russia could furnish; and gradually he sank under the disease, till death put
an end to his sufferings towards the close of the following January.
Such was the end of Peter I. of Russia, deservedly named the "Great;"
though he was the strangest compound of contradictions, perhaps, that the
world has ever seen. In him the most ludicrous undertakings were mingled
with the grandest political schemes. Benevolence and humanity were as
conspicuous in his character as a total disregard of human life. He was at
once kind-hearted and severe, even to the extent of ferocity. Without
education himself he promoted arts, sciences, and literature. "He gave,"
says one of his biographers, "a polish to his people, and yet he was himself
a savage; he taught them the art of war, of which, however, he was himself
ignorant; from the sight of a small boat on the river Moskwa he created a
powerful fleet, and made himself an expert and active shipwright, sailor,
pilot, and commander; he changed the manners, customs, and laws of the
Russians, and lives in their memory, not merely as the founder of their
empire, but as the father of his country."
Yes; the memory of Peter the Great to this day is dear among all classes
of the Russians, from the noblest of the Boyards down to the meanest
peasant. But if among the towns and villages of his vast empire there be one
in which his name is cherished with especial honour, it is that little fishing
town of Lachta; and in proof of our assertion we may add, that the cottage
in which "Steenie" and his mother lived and died is still familiarly known to
every traveller in those parts as "Peter's House."
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