The importance of economic growth

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Presentation transcript:

The importance of economic growth …for poor countries

selected poverty statistics In the poorest one-fifth of all countries, daily caloric intake is 1/3 lower than in the richest fifth the infant mortality rate is 200 per 1000 births, compared to 4 per 1000 births in the richest fifth.

selected poverty statistics In Pakistan, 85% of people live on less than $2/day One-fourth of the poorest countries have had famines during the past 3 decades. (none of the richest countries had famines) Poverty is associated with the oppression of women and minorities

Estimated effects of economic growth A 10% increase in income is associated with a 6% decrease in infant mortality Income growth also reduces poverty. Example: Growth and Poverty in Indonesia 1984-96 change in # of persons living below poverty line change in income per capita +76% -25% 1997-99 -12% +65%

Income and poverty in the world selected countries, 2000

The importance of economic growth …for poor countries …for rich countries

Huge effects from tiny differences In rich countries like the U.S., if government policies or “shocks” have even a small impact on the long-run growth rate, they will have a huge impact on our standard of living in the long run…

Huge effects from tiny differences percentage increase in standard of living after… annual growth rate of income per capita …25 years …50 years …100 years 2.0% 64.0% 169.2% 624.5% 2.5% 85.4% 243.7% 1,081.4%

Huge effects from tiny differences If the annual growth rate of U.S. real GDP per capita had been just one-tenth of one percent higher during the 1990s, the U.S. would have generated an additional $449 billion of income during that decade

The lessons of growth theory …can make a positive difference in the lives of hundreds of millions of people. These lessons help us understand why poor countries are poor design policies that can help them grow learn how our own growth rate is affected by shocks and our government’s policies

Prediction: Higher s  higher k*. And since y = f(k) , higher k*  higher y* . Thus, the Solow model predicts that countries with higher rates of saving and investment will have higher levels of capital and income per worker in the long run.

International Evidence on Investment Rates and Income per Person

The transition to the Golden Rule Steady State The economy does NOT have a tendency to move toward the Golden Rule steady state. Achieving the Golden Rule requires that policymakers adjust s. This adjustment leads to a new steady state with higher consumption. But what happens to consumption during the transition to the Golden Rule?

Starting with too much capital then increasing c* requires a fall in s. In the transition to the Golden Rule, consumption is higher at all points in time. time y c i t0

Starting with too little capital then increasing c* requires an increase in s. Future generations enjoy higher consumption, but the current one experiences an initial drop in consumption. y c i t0 time

Prediction: Higher n  lower k*. And since y = f(k) , lower k*  lower y* . Thus, the Solow model predicts that countries with higher population growth rates will have lower levels of capital and income per worker in the long run.

International Evidence on Population Growth and Income per Person