Taxicab fares in most cities are regulated. several years ago, taxicab drivers in boston obtained permission to raise their fares 10 percent, and they anticipated that revenues would increase by about 10 percent as a result. they were disappointed, however. when the commissioner granted the 10 percent increase, revenues increase by only about 5 percent. what can you infer about the elasticity of demand for taxicab rides? what were taxicab drivers assuming about the elasticity of demand?