INFJs tend to see helping others as their purpose in life, but while people with this personality type can be found engaging rescue efforts and doing charity work, their real passion is to get to the heart of the issue so that people need not be rescued at all.
Cross elasticity of demand Cross elasticity of demand (XED) is the responsiveness of demand for one product to a change in the price of another product. Many products are related, and XED indicates just how they are related.
The cross-price elasticity of demand is used to measure by how much the quantity demanded of a certain good changes as the price of a different good changes. It is defined as the percentage change in quantity demanded of a certain good 1 divided by the percentage change in price of a good 2.