From 1890 to 2010, countries with lower levels of real GDP per person than the United States all had growth rates that are lower than that of the United States.

The coefficient of determination is .90, the number of observations is 30, and a multiple regression model using 2 independent variables is estimated. What is the value of the adjusted coefficient of determination?

A) .8926 B) .9000 C) .7500 D) .8000

Price elasticity of demand is useful because it measures __________ responsiveness to changes in __________

a. taxpayers'; demand b. producers'; supply c. consumers'; price d. consumers'; demand e. producers'; income