Let W be the included exogenous variables in a regression function that also has endogenous regressors (X). The W variables can

A nation that currently has a surplus in its capital account is called a

A) debtor nation. B) net lender. C) net borrower. D) current account surplus nation. E) creditor nation.

If additional units of a good are produced at an increasing opportunity cost, the production possibilities frontier would be bowed outward (concave)

Indicate whether the statement is true or false