What do you mean by cross demand?
Demand can be defined as the quantity of goods and services that
a consumer is willing and ready to buy and at given price and at a
particular period of time.
Cross demand can be explain by using the knowledge of cross
elasticity of demand.
Hence cross demand is the same as cross elesticity of
demand.
Cross elasticity of demand measured the degree of responsiveness
of the demand for one good due to a price change of another
good.
Complements goods are denoted by negative cross elasticity while
substitude goods are denoted by positive elasticity.
Cross demand is measured as the percentage change in demand for
the first good that occurs in response to a percentage change in
price of the second good. Take for instance, if, in response to a
5% increase in the price of Kerosine, the demand of new stove that
are kerosine inefficient decreased by 10%, the cross elasticity of
demand would be: -10% divided by 5% equal to -1