You Have Learned in One of Your Economics Courses That $$\widehat { \text { RelPersInc } } = 0.518 - 18.831 \times \left( n - n _ { u s } \right) , R ^ { 2 } = 0.522 , S E R = 0.197$$

question 10

Essay

You have learned in one of your economics courses that one of the determinants of per
capita income (the "Wealth of Nations")is the population growth rate.Furthermore you
also found out that the Penn World Tables contain income and population data for 104
countries of the world.To test this theory, you regress the GDP per worker (relative to
the United States)in 1990 (RelPersInc)on the difference between the average population
growth rate of that country (n)to the U.S.average population growth rate (nus )for the
years 1980 to 1990.This results in the following regression output: $$\widehat { \text { RelPersInc } } = 0.518 - 18.831 \times \left( n - n _ { u s } \right) , R ^ { 2 } = 0.522 , S E R = 0.197$$ (a)Interpret the results carefully.Is this relationship economically important?

---

Definitions:

Muscle Cell

Specialized cells that make up muscle tissue, capable of contracting and generating force, essential for movement and posture.

Spindle-Shaped Cells

Cells that are tapered at both ends; commonly found in smooth muscle tissues where they help in contraction and relaxation activities.

Smooth Muscle

A type of muscle found in the walls of hollow organs like the intestines and blood vessels, characterized by its involuntary control and the ability to slowly contract and relax.

Skeletal Muscle

A type of striated muscle that is attached to bones and is under voluntary control, responsible for movement.