A resource that can substitute for something but at a higher price is called

What would be an example of an implicit cost of production?

a. the cost of a delivery truck in a business that rarely makes deliveries b. the cost of employee training programs c. the cost of raw materials for producing bread in a bakery d. the cost of lost income an entrepreneur could have earned working for someone else

The gap between rich and poor countries is likely to be greatest for

a. life expectancy b. literacy rate c. per capita income d. moral development e. years of education