1. If we are trying to relate output to labor inputs and capital inputs using regression analysis, would we expect the coeffi cients of the regressions to be positive or negative? Why? 2. What are...

1. If we are trying to relate output to labor inputs and capital inputs using regression analysis, would we expect the coeffi cients of the regressions to be positive or negative? Why?

2. What are dummy variables? How are they useful in identifying differences among groups?