Dedicated to my students, past, present and future, and to all students of economics, worldwide, to assist in their pursuit of economics knowledge.
So this is the cost of what you are doing, PLUS the cost of what you gave up to do the thing you are doing now. And it doesn't have to have a monetary value.
So this is the cost of what you are doing, PLUS the cost of what you gave up to do the thing you are doing now. And it doesn't have to have a monetary value.
ReplyDelete