According to UN projections, what proportion of the world's urban population will reside in the urban areas of developing countries by 2025?

If the demand for airline tickets to Fort Lauderdale is price elastic,

a. airline revenue will increase if supply increases b. airline revenue will increase if supply decreases c. a small change in price will cause a large shift in the demand curve d. a large change in price will cause a small shift in the demand curve e. a large change in price will cause a large shift in the demand curve

If personal income taxes are increased, disposable income and consumption

a. increase. b. stay the same. c. decrease. d. change in an unpredictable direction.