Income elasticity of demand measures: 0 how much quantity demanded changes in response to a price change. 0 how much a consumer can buy at given income levels. 0 how much consumer purchasing power is affected when prices change. how demand for a good changes in response to changes in income. One explanation for why the poor tend to receive more noncash assistance than cash assistance is that: O taxpayers prefer to give cash assistance. 0 the poor are better off with noncash assistance. 0 those who supply noncash services have more political power than the poor. Q) the poor prefer to receive noncash assistance