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.
Demand is a multivariable function. If income and other determinants of demand such as tastes of the consumers, changes in prices of related goods, income distribution, etc., remain constant and there is a change only in price of the commodity, then we move along the same demand curve.In this case, the demand curve remains unchanged.f income and other determinants of demand such as tastes of the consumers, changes in prices of related goods, income distribution, etc., remain constant and there is a change only in price of the commodity, then we move along the same demand curve. In this case, the demand curve remains unchanged.