or the interdependence principle:

Opportunity cost principle

Marginal principle

Interdependence principle

Answer Bank

Roberta is considering taking a job as a barista. However, she will remain in her current job if the wage she is offered is below her current wage.

A lower wage for baristas results in more people taking jobs in different lines of work that pay better.

Baristas may choose to work fewer hours if the wage for baristas falls.

b$.$ The three statements in part a illustrate how the opportunity cost principle, the marginal principle, and the interdependence principle can be used to explain why the