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.
1 A good is income inelastic if the income elasticity of demand is greater than 0 but less than 1. 2  This implies that for a 1% change in income, demand for the good changes by less than 1%. 3  A good is considered inferior if the associated income elasticity of demand is a negative number.he price elasticity of demand measures the responsiveness of the quantity demand of a good when the price of that same good changes. We calculate the elasticity of demand by measuring the percentage change in the quantity demand over the percentage change in price of that good (% change in Q d / % change in price).