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 price level elasticity of aggregate demand is a concept which has been overlooked in both macroeconomic textbooks (3) and the research literature (4) but is a relevant influence for the balance of trade and changes in the size of the trade deficit or surplus.