Suppose that de beers and the local water utility are both monopolists, in the markets for diamond jewelry and water, respectively. if both monopolies decide to raise prices by 15%, the monopoly that is most likely to see its total revenue decrease is ( a) de beers or b) the local water utility) because it’s demand is a) unit elastic, b) less price elastic, or c) more price elastic.

By 2020, automobile market analysts expect that the demand for electric autos will increase as buyers become more familiar with the technology. however, the costs of producing electric autos may increase because of higher costs for inputs (e.g., rare earth elements), or they may decrease as the manufacturers learn better assembly methods (i.e., learning by doing). what is the expected impact of these changes on the equilibrium price and quantity for electric autos?