Seminar notes: Economic growth

  • twenty years ago I was interested in …

The Needham problem

  • Joseph Needham
  • given its early achievements and innovations, why did China not continue to lead in scientific and industrial developments, allowing Europe to overtake it and usher in the modern scientific revolution?
  • “Why was Europe first?”

I began reading about economic growth

  • or “social change” more generally
  • this article by Abramowitz was the most interesting thing I read

Why I like it so much?

  • starts with serious economic theories
  • theories of the firm
  • theories of political economy
  • decides that they aren’t good enough

That is,

  • economists can’t explain economic growth!

Finishes with

  • pure sociology, political science, cultural theory
  • “social climate”

Where did things go wrong for economic theory?

  • long-term economic growth can only be explained by technological development

How to explain technological development?

  • you need all those other, non-economic, theories and perspectives

This provided an opening for me

  • I came up with my own answer to the Needham problem
  • I can talk about that at the end
  • but first let’s turn to Abramowitz’ article

Adam Smith, “The wealth of nations,” 1776

Today — everyone is talking about “economic growth”

  • but how should it be explained?
  • if there is anything economists should be able to explain, it is surely this!

Smith talks about “wealth,” but what is it?

  • Smith’s great insight: not how much we have, but how much we can produce
  • our productivity

We talked about this before

  • the difference between an old, rich, woman
  • and a young, brilliant, artist

Wealth is a question of

  • providing the right conditions for brilliant painters, so to speak

Smith trusted in individuals and in their self-interest

  • people are constantly trying to find the most advantageous use for their money

If everyone acts in this way — the total benefit for society will be maximized

  • as individuals we are all selfish, but the total outcome of our selfish actions is the outcome most beneficial to society
  • cf. self-interest of baker and shoe-maker etc

The “invisible hand”

“he intends only his own gain, and he is in this, as in many other cases, led by an invisible hand to promote an end which was no part of his intention

Division of labor

Smith was fascinated by pin factories

  • from 10 pins a day per person
  • to 48,000 pins by 10 people
  • 4,800 pins each

Advantages of specialization …

  • division of labor — more productive labor
  • easier to invent machines

The idea of the factory

  • unleashed a tremendous potential

Size of the market

  • the bigger the market, the more specialization
  • for a very big market you can survive making a very small thing

Applies also across borders

  • world market — globalization
  • we need to make the markets as big as possible — increase specialization
  • in order to take advantage of division of labor — we must trade

Advantage of foreign trade:

‘”if a foreign country can supply us with a commodity cheaper than we ourselves can make it, better buy it of them with some part of the produce of our own industry, employed in a way in which we have some advantage … It is certainly not employed to the greatest advantage, when it is thus directed towards an object which it can buy cheaper than it can make it”

I.e.

  • free trade permits the best allocation of society’s resources
  • protective tariffs interfere with this allocation — reduce national income

“The dismal science”

The only problem:

  • once labor is perfectly divided, you cannot go further
  • growth will come to an end

Factors of production

You get the same result if you look at how something is produced

  • production functions

What do we need in order to make something — like a chair?

  • raw material
  • tools — capital
  • labor

Input-driven growth

What you get out of the economy depends on what you put in

  • land is fallow, workers have no jobs, machines are not turning
  • the economic potential it not realized

The economy grows if you realize this potential

  • plant more potatoes on a given piece of land

Cf. China’s spectacular growth during the past 40 years

  • central planning meant that productive resources were not used
  • after the introduction of markets and capitalism — China simply had to grow
  • the growth could actually have been higher

But what happens when you run out of inputs?

  • you can’t get more output if there is no more input
  • the economy grinds to a halt
  • similar to the limits of division of labor

Cf. Thomas Malthus

  • English clergyman
  • convinced that any economic improvements would be wiped out by population growth
  • GDP/capita stay the same or decline
  • there is less for people to eat

Population grows geometrically

  • food production grows arithmetically

Decreased marginal utility of labor

  • more people are working on the same land
  • the last person contributes less
  • decreased productivity per person

Preventive checks

  • moral restraint
  • delayed marriages
  • celibacy

Positive checks

  • famine
  • disease
  • war

Actual population growth rates

  • the number of children declines with increased GPD per capita
  • Taiwan had fewer newborn children than China — despite the one-child policy

Why was Malthus wrong?

  • women’s participation in the work force
  • access to family planning
  • changing social norms
  • urbanization — children are not an asset
  • social security and pensions — you don’t need to rely on your children in your old age

World population

  • will peak at 10 billion in the 2080s
  • and stabilize and decline after that

Thomas Carlyle: the “dismal science”

Economics, with its predictions of gloom and societal challenges based on self-interest and limited resources, offered a bleak outlook on the world’s future.

It is a science of ultimate decline or at least stasis

  • sooner or later we will always run out of resources

Cf. Karl Marx

From this perspective

  • Communism as unleashing new productive potential
  • not a question of justice — but of economic growth

The means of production

  • the physical tools and resources required to produce goods

Relations of production

  • the social organization of production
  • a certain given social type

A slave economy, a feudal economy, a capitalist economy

  • they all set limits to the economy

Communism will shatter those limits

  • unleash new potential
  • “fully automated luxury Communism”

Return to growth theories

From the middle of the 19th century

  • economists stopped worrying about growth
  • the economy was growing very quickly — nothing to worry about!

“Development” as a catch-word for the protectorates of the League of Nations

  • but how is development to be achieved?

Acute issue after the end of the Second World War

  • competition with the Soviet Union
  • “central planning is a much more efficient system”

Often fought in newly independent poor countries

  • they wanted their economies to grow
  • but what could the West offer them?
  • great efforts by big scientific foundations to develop “theories of growth”

Much better statistical data

  • GDP data only after WW2

Growth accounting

Robert Solow

  • paper in 1956, Nobel Prize in 1987

Basic idea

  • measure the contribution of different factors of production to economic growth
  • understand the sources of long-term economic growth

Decomposes the growth rate of an economy’s total output into components that are attributed to

  • labor, capital, natural resources

Shocking results:

  • only 20% of growth explained this way
  • the rest was “the Residual”
  • “a measure of our ignorance”
  • that is a lot of ignorance!

Later attempts

  • got the residual down to 50 percent
  • that is still not that great

What is the rest?

  • everyone agreed that it had to do with productivity gains
  • more efficient use of resources

Technology

  • economic growth is a consequence of technological development

For example,

  • use biotechnology to increase crop yields
  • use machines to make chairs
  • use computers

Our economies have grown exponentially for two hundred years

  • far outstripping all our previous limitations

Ergo,

  • if we want to explain economic growth, we must explain technological change

But how should we explain technological change?

  • this is where economists fall down
  • they are simply not equipped to do it

Most of Abramowitz article deals with the existing economic theories of economic growth

  • he gives credit to some of them
  • but is critical of most of them
  • this is where his article becomes very detailed — and a bit difficult to follow

Basic problem:

  • economists are limited by their models

Give incentives to individuals

  • lower taxes etc
  • but unclear relationship to technological innovation

Higher savings, higher investments in R and D

  • but it is obviously not that simple

The problem of balancing models

  • they come to a stop
  • they can’t sort of go anywhere

Perfect competition

  • profits go down to zero
  • and there is no money for research

Austrian economics is better!

  • evolutionary perspective

Joseph Schumpeter, Austrian economist

  • the importance of monopoly profits
  • the importance of entrepreneurs

Capitalism as a question of

  • “creative destruction”
  • you destroy at the same rate as you create

Role of companies

Technological advancement

  • contingent on investment
  • businesses must invest in research and development to pioneer new products and processes that meet market demands and improve efficiency

Feedback loop

  • technological progress is influenced by business activity
  • which in turn responds to technological advancements

The pace and direction of technological development are shaped by

  • production, investment, market demands, and competitive pressures

Issues of patents

  • reward inventors
  • but not restrict dissemination

Retaining staff

  • invest in staff that goes elsewhere for more money

Role of government

Investment in infrastructure

the development and effective use of technology require

  • advanced infrastructure in power, transportation, and communication
  • markets may not sufficiently provide due to the public goods nature of such investments

Education

For example

  • the significance of a highly skilled workforce
  • creating a society that values and supports continuous learning and innovation
  • shifting values towards more knowledge-intensive activities.

“Positive externalities”

  • greater benefits to society than just to individuals and companies
  • justifies a role for government

Research

Research is expensive and the returns are uncertain

  • carry high risks and uncertainties, especially given the potential for commercial obsolescence
  • markets, being risk-averse and focused on short-term returns, may underinvest in the long-term research and development

Regulatory environment

Protect property rights, enforce contracts, and regulate economic activities to ensure fair competition

  • prevent monopolies, thereby encouraging investment and innovation

Stable macroeconomic environment

  • a strong propensity to save
  • well-developed financial system
  • legal and regulatory systems that protect property rights and encourage entrepreneurship

Economic structure transformation

  • changes society — puts people under strain — consequences of growth
  • the government has to deal with them
  • economic growth — more of a welfare state
  • Dani Rodrick on globalization

Decline of Britain

How lot’s of innovations originally were made in Britain

  • but only realized in the US
  • very difficult to find something “made in the UK”

For example

  • telephone
  • jet engines
  • LCD displays
  • computer technology
  • World Wide Web
  • AI

Why?

  • better funding
  • technological ecosystem
  • university research
  • skilled workforce

Wars sharpen the mind

  • the competition during war often leads to technological breakthroughs
  • often as a result of vast spending by the state

Cf. the only viable Soviet innovations

  • Kalashnikov, AK-47, machine guns
  • Tupolov airplances
  • Sputnik and other space technology

The Spy Who Came in From the Cold

  • Switzerland and the coo-coo clock

US defense budget

  • great innovations

For example

  • internet infrastructure
  • GPS — and Google Streetview
  • semi-conductors and micro-chips
  • stealth technology
  • voice recognition and AI
  • drones
  • satellite imaging

“Social climates”

  • quotes Kuznets

The underlying social climate and public attitudes towards economic activities and government policies

  • the importance of a societal outlook that supports secularism, egalitarianism, and nationalism is emphasized

Egalitarianism

Democracy

Nationalism

A growth society

  • organize and utilize resources efficiently
  • the societal values that encourage innovation and hard work
  • institutional and educational frameworks that support technological advancement and skill development

Markets, while efficient in allocating resources, do not inherently provide or enhance these social capabilities

But Abramowitz shows that these factors too vary a lot

  • they change over time
  • and they are totally different in the US, UK and Japan
  • and they would not apply to China at all

Best explanation — John Stuart Mill:

Innovative hubs

1oth century Baghdad

15th century Florence

  • all those painters lived really close to each other

London in the 1960s

Silicon Valley

What do they have in common?

  • they are all urban setting
  • people from all different background come together
  • there is an intense competition — but not necessarily for money
  • the people involved often very young

Why Europe was first

My explanation …

Mazzucato, What is economic value and who creates it?

Degrowth