Her father is Robert Ellis Silberstein (Jewish). Her mother is Diana Ross (African-American).
If the cross price elasticity is positive, then we call such goods Substitutes (example: pizza and burgers -- you usually consume either or). The income elasticity of demand measures the change in the quantity demanded of some good, when the income changes, holding everything else constant.For example you can measure what happens to the demand for expensive red wine when income increases.f the cross price elasticity is positive, then we call such goods Substitutes (example: pizza and burgers -- you usually consume either or). The income elasticity of demand measures the change in the quantity demanded of some good, when the income changes, holding everything else constant.
Price elasticity of demand measures the change in consumption of a good as a result of a change in price. It is calculated by dividing the percent change in consumption by the percent change in price. For example, if the price of a name-brand microwave is raised by 20% and subsequently consumer purchases of this product drop by 25%, the microwave has a price elasticity of demand of 25% divided by 20%, or 1.25.