### Exploring Feedback and Growth

1. The destabililizing and stabilizing forces mentioned in
the text are examples of feedback. Feedback is discussed in here:

http://ingrimayne.com/econ/AllocatingRationing/PriceAndFeedback.html

There are problem sets about feedback here:

http://ingrimayne.com/econ/AllocatingRationing/feedback.htm

and here:

http://ingrimayne.com/econ/Cycles/feedbak2.htm

2. Suppose two countries start with per capita income of $1000.
One country is able to grow at 3% annually while the other grows at
3.3% annually. How much difference will that slightly greater growth
rate make in 100 years? In 200 years? You can find out by using the
compound interest rate calculator at:

http://www.moneychimp.com/calculator/compound_interest_calculator.htm

What did you find?

3. People who deal with growth rates often talk about the "Rule of
70" or the "Rule of 72." Search the Internet to discover what these
rules are. Which is more accurate? Can you use them to get a rough
estimate of the answers in the previous question?