chapter 8

Question 1

when should we use non-linear regression model? what do we mean by mis-specification of the model?

Question 2

What is the meaning of the coefficients when we have two dummy variables? how do we find them?

Question 3

what is the interpretation of the coefficient when we have a dummy continuos? what would be the graphical rapresentation?

Question 4

Can we directly interpret the coefficients of continuos/continuos? how can it be useful?

Question 5

What are the LS assumptions when there is a relation between variables?

Question 6

what is the notation for a change of y (and expected change of y) with non-linear functions?

Question 7

What is the purpose of including polynomials? are the coefficients interpretable?

Question 8

What is the trade-off of including polynomials? how do we decide how coefficient to keep?

Question 9

What is the interpretation of beta in linear-log regressions?

Question 10

What is the interpretation of beta in log-linear regressions?

Question 11

what is the interpretation of beta in log-log regressions?