Which of the following is nonrival in character?

An input-output table details the sales of each industry to all other industries in an economy

Indicate whether the statement is true or false

The formula for price elasticity of demand that is used in practice

A. usually drops all minus signs. B. usually takes on different values at different points on the demand curve. C. may calculate the percentage change in price between P1 and P2 as “(P2 ? P1) as a percentage of (P1 + P2)/2.” D. All of the responses are correct.