endogenous 1.ppt
- 1. Economic Growth: The Short Run vs. the Long Run Time National economic output Actual output Potential output Business cycles in the short run Economic growth in the long run Downswing Upswing The crisis of 1997-98 is irrelevant to Asia’s long-term growth potential.
- 2. Economic Growth: The Short Run vs. the Long Run To analyze the movements of actual output from year to year, viz., in the short run Need short-run macroeconomic theory Keynesian or neoclassical To analyze the path of potential output over long periods Need modern theory of economic growth Neoclassical or endogenous
- 3. The Neoclassical Theory of Exogenous Economic Growth Traces the rate of growth of output per capita to a single source: Technological progress Hence, economic growth in the long run is immune to economic policy, good or bad. “To change the rate of growth of real output per head you have to change the rate of technical progress.” ROBERT M. SOLOW
- 4. The New Theory of Endogenous Economic Growth Traces the rate of growth of output per capita to three main sources: Saving Efficiency Depreciation “The proximate causes of economic growth are the effort to economize, the accumulation of knowledge, and the accumulation of capital.” W. ARTHUR LEWIS
- 5. Exogenous vs. Endogenous Growth The neoclassical view that economic growth in the long run is merely a matter of technology The new view that long-run growth depends on saving, efficiency, and depreciation is more illuminating.
- 6. A Simple Model of Endogenous Growth Four building blocks: S = I Saving equals investment in equilibrium. S = sY Saving is proportional to income. I = K + K Investment involves addition to capital stock. Y = EK Output depends on quality and quantity of capital.
- 7. A Simple Model of Endogenous Growth Implication: g = sE - Rate of economic growth equals Saving rate times Efficiency (i.e., the output/capital ratio) minus Depreciation
- 8. Endogenous Growth in the Harrod-Domar Model You may recognize the endogenous growth model as a reinterpretation of the Harrod-Domar model where growth depends on A. the saving rate B. the capital/output ratio C. the depreciation rate
- 9. Sources of Endogenous Growth I Saving Important implication for economic policy: Economic stability with low inflation and positive real interest rates spurs saving, which is good for growth.
- 10. Sources of Endogenous Growth I 100 400 300 200 1965 1990 East Asia OECD Africa Income per capita
- 11. Sources of Endogenous Growth II Depreciation The effect of depreciation on growth is related to that of saving and investment on growth. Unprofitable investment in the past reduces the quality of capital and makes it depreciate more rapidly, necessitating more replacement investment to make up for economic and physical wear and tear. The more national saving has to be set aside for replacement investment, the less will be available for the buildup of new capital.
- 12. Investment: Quantity and Quality Compare Botswana and Tanzania: In Botswana, the share of State-Owned Enterprises in total investment fell from 16% in 1985-90 to 12% in 1990-97. In Tanzania, the SOE share of investment fell from 46% in 1985-90 to 23% in 1990-97. This is probably a good sign. Privatization helps improve investment.
- 13. Investment: Quantity and Quality Investment quality, however, is not only a question of public vs. private enterprise. Sound banking is also important. It takes sound commercial banks, usually privately owned banks motivated by profit rather than by political concerns, to channel household savings into high-quality investment.
- 14. Sources of Endogenous Growth III Efficiency Also fits real world experience quite well Technical progress is good for growth because it allows us to squeeze more output out of given inputs. And that is exactly what increased efficiency is all about! Thus, technology is best viewed as an aspect of general economic efficiency. Important implication for economic policy: Everything that increases economic efficiency, no matter what, is also good for growth.
- 15. Sources of Endogenous Growth III Five sources of increased efficiency 1. Liberalization of prices and trade increases efficiency, which is good for growth. 2. Stabilization reduces the inefficiency associated with inflation, which is good for growth. 3. Privatization reduces the inefficiency associated with state-owned enterprises, which … 4. Education makes the labor force more efficient. 5. Technological progress also enhances efficiency. The possibilities are virtually endless!
- 16. Sources of Endogenous Growth III This is good news. If growth were merely a matter of technology, we would not be able to do much about it … … except to follow technology-friendly policies by supporting R&D and such. But if growth depends on saving and efficiency, there are things that we can do, in the private sector as well as through the public sector, to foster rapid economic growth. Because everything that is good for saving and efficiency is also good for growth.
- 17. What to Do to Encourage Economic Growth Maintain strong incentives to save Keep inflation low and real interest rates positive Maintain financial system in good health so as to channel saving into high-quality investment Foster efficiency 1. Liberal price and trade regimes 2. Low inflation 3. Strong private sector 4. More and better education 5. Limited, or well managed, natural resources
- 18. Liberalization and Economic Growth Liberalization of prices means that markets, not bureaucrats, are allowed to set prices. Mixed market economy is more efficient than central planning. Compare former Soviet Union with the US and Europe Liberalization of trade allows specialization according to comparative advantage. Free trade is more efficient than self-sufficiency. North Korea and Cuba vs. Hong Kong and Singapore Applies to trade in goods, services, capital. 1
- 19. Liberalization Increases Economic Efficiency G E C Traditional output Modern output H D Domestic, distorted price ratio O
- 20. Liberalization Increases Economic Efficiency G F A B C Output gain Traditional output Modern output D H E Price distortion World price ratio Domestic, distorted price ratio If output gain = E and price distortion = c, then E = mc2 OC = modern output CA = traditional output OA = total output O
- 21. Liberalization Increases Economic Efficiency G F A B C Output gain Traditional output Modern output D H E Price distortion World price ratio Domestic, distorted price ratio O J K Imports Exports Welfare gain
- 22. Liberalization Increases Economic Efficiency G F A B C Traditional output Modern output D H E Price distortion O J Welfare gain M N Q Transition takes time: From E to F via M, N, and Q
- 23. Liberalization Increases Economic Efficiency D G F E A B Price distortion J O H World price ratio C AB = static gain BC = dynamic gain AC = AB + BC = total gain Productivity gain K Welfare gain Traditional output Modern output
- 24. Growth and Trade, 1965-98 105 countries -6 -4 -2 0 2 4 6 8 10 0 50 100 150 200 250 300 350 Trade (% of ppp-adjusted GDP) Growth per capita (% per year) NB: UAE, Hong Kong, and Singapore. Singapore Hong Kong United Arab Emirates China Korea Botswana Each 50 percentage point increase in the trade ratio is associated with an increase in per capita growth by almost 1% per year.
- 25. Growth and Trade, 1965-98 32 sub- Saharan African countries -6 -4 -2 0 2 4 6 8 10 0 20 40 60 80 100 Trade (% of ppp-adjusted GDP) Growth per capita (% per year) Each 20 percentage point increase in the trade ratio is associated with an increase in per capita growth by 1% per year.
- 26. Growth and Foreign Direct Investment, 1965-98 100 countries -4 -2 0 2 4 6 8 10 0 2 4 6 8 10 12 14 Foreign direct investment (% of ppp-adjusted GDP) Growth per capita (% per year) Qualification: Relationship rests on Botswana and Singapore. Botswana Singapore Each three percentage point increase in the FDI ratio is associated with an increase in per capita growth by almost 1% per year.
- 27. Growth and Foreign Direct Investment, 1965-98 -4 -2 0 2 4 6 8 10 0 2 4 6 8 Foreign direct investment (% of ppp-adjusted GDP) Growth per capita (% per year) Each one percentage point increase in the FDI ratio is associated with an increase in per capita growth by almost 1% per year. 31 sub- Saharan African countries Relationship depends on the inclusion of Botswana. Botswana
- 28. Stabilization and Economic Growth Stabilization of prices means that distortions associated with inflation are reduced. Inflation distorts the choice between real and financial capital by punishing money holdings, and thus creates inefficiency in production. Inflation thus involves a tax, the inflation tax. An inefficient tax compared with most other taxes. Inflation also creates uncertainly which tends to discourage trade and investment. Inflation also tends to result in overvaluation of currency, thus hurting exports and growth. 2
- 29. Stabilization Increases Economic Efficiency Financial capital Real capital Undistorted price ratio G F E A Inflation distortion 45° Output after Output before Distorted price ratio C D H O B Output gain If output gain = E and inflation distortion = c, then, again, E = mc2
- 30. Privatization and Economic Growth Privatization means that profit-oriented owners and able managers are allowed to direct enterprises. Profit motive replaces political considerations as the guiding principle of business operations. Profit-maximizing owners generally want to appoint managers and staff on merit rather than on the basis of political connections, for example. Private enterprise is generally more efficient than state-owned enterprises. 3
- 31. Privatization Increases Economic Efficiency Private output Public output Undistorted price ratio D G Distorted price ratio F E A B N Price and quality distortion H O J K 45° Output gain
- 32. Same Story Time and Again Free trade is good for growth Reduces the inefficiency that results from restrictions on trade Price stability is good for growth Reduces inefficiency resulting from inflation Privatization is good for growth Reduces inefficiency resulting from SOEs Education is good for growth Reduces the inefficiency that results from inadequate education
- 33. Same Story Time and Again Can describe this by simple arithmetic The efficiency gain from eliminating an economic distortion (trade restrictions, inflation, unnecessary state intervention, insufficient education) is directly proportional to the square of the distortion: E = mc2 E stands for efficiency gain, m is a multiplicative constant, and c is the distortion
- 34. E = mc2 If the distortion is substantial (severe trade restrictions, high inflation, big SOE sector, poor education), then reducing or eliminating the distortion can increase efficiency and growth a great deal. We can see this by plugging appropriate numbers into the formula and also by econometric research, where the theory is compared with experience (i.e., economic statistics).
- 35. Education and Economic Growth Education means a better trained and hence more efficient work force. Need to provide primary and secondary education to all, especially females Need to provide tertiary education to a greatly increased number of people Need increased public commitment to education This requires both increased public expenditure on education and probably also increased scope for private sector involvement in education. 4
- 36. Growth and Education, 1965-98 86 countries -4 -2 0 2 4 6 8 10 0 20 40 60 80 100 120 140 Secondary-school enrolment 1980-97 (%) Growth per capita (% per year) An increase in secondary-school enrolment by 40% of each cohort goes along with an increase in per capita growth by 1% per year.
- 37. Growth and Education, 1965-98 -6 -4 -2 0 2 4 6 8 10 0 1 2 3 4 5 6 7 8 Public expenditure on education (% of GNP) Growth per capita (% per year) Each two percentage point increase in the education expenditure ratio is associated with an increase in per capita growth by about 1% per year. 33 sub- Saharan African countries
- 38. Natural Resources and Economic Growth Natural resources, if not well managed, may turn out to be, at best, a mixed blessing. Three possible channels Education Dutch disease Rent seeking What is the evidence? 5
- 39. Natural Resources and Economic Growth 1965-98 Abundant natural resources, if not well managed, appear harmful to growth. -4 -2 0 2 4 6 8 10 0 10 20 30 40 50 60 Share of natural capital in national wealth (%) Growth per capita (% per year) 86 countries A ten percentage point increase in the natural capital share goes along with a decrease in per capita growth by nearly 1% per year.
- 40. Natural Resources and Education 90 countries 0 1 2 3 4 5 6 7 8 9 0 10 20 30 40 50 60 Share of natural capital in national wealth (%) Public expenditure on education (% of GNP) An 18 percentage point increase in the natural capital share is associated with a decrease in public expenditure on education by 1% of GNP. Abundant natural resources appear to crowd out human resources.
- 41. Natural Resources and Corruption Abundant natural resources appear to go along with corruption. 0 1 2 3 4 5 6 7 8 9 10 0 5 10 15 20 25 Share of natural capital in national wealth (%) Corruption index New Zealand 45 countries
- 42. What Is the Upshot? Economic growth responds to public policy. In particular, by encouraging saving and investment of high quality foreign trade and investment education ... the government can help foster rapid economic growth.
- 43. Sir Arthur Lewis Got It Right Since the second world war it has become quite clear that rapid economic growth is available to those countries with adequate natural resources which make the effort to achieve it. W. ARTHUR LEWIS (1968)
- 44. What Else? These lessons are borne out by experience from around the world. Additional lessons: Too much inflation hurts saving, investment, and trade — and thereby also growth. Too much SOE activity hurts the quality of investment and education — and growth. Too much agriculture and, more generally, natural resource dependence, if not well managed, hurts education and trade — and thereby also growth. Too rapid population growth also tends to impede economic growth.
- 45. Reservations Even so, the question of rapid growth is, of course, a bit more complicated. We also need to address a host of political, social, and cultural questions as well as questions of natural conditions, climate, and public health — which would take us too far afield. But the main point remains: To grow or not to grow is in large measure a matter of choice. Many of the constraints on growth are man- made, and can be removed.
- 46. In Conclusion: It Can Be Done Economic growth makes a difference, especially in poor countries. A question literally of life and death And not only in poor countries, for there is poverty amid plenty in rich countries Recall the main point of Gunnar Myrdal’s Asian Drama (1968): It was that the Asian economies were incapable of rapid economic growth! New growth theory suggests that similar claims about Africa will also be proven wrong.
- 47. In Conclusion: It Can Be Done There has been much progress in economic policy and performance around the world in the 1990s. Growth-friendly reforms have been widely embraced among ordinary people and politicians across the political spectrum, not only in Asia, but also, increasingly, in other parts of the world, including Africa. Yet, various special interest groups try to resist.
- 48. ‘Reformers have the idea that change can be achieved by brute sanity.’ George Bernard Shaw To grow or not to grow is in large measure a matter of choice. These slides can be viewed on my website: www.hi.is/~gylfason/copenhagen.ppt In Conclusion: It Can Be Done