These are the last two of the common elasticities typically
studied in intro mirco, though there are many other elasticities
of interest to economists.
or simply -- Income elasticity of demand:
change in desired quantity demanded, due to a change in
income.
-- Own price elasticity of supply:
change in desired quantity supplied, due to a change in market
price.
or simply 
-- Income elasticity of demand:
-- Own price elasticity of supply:
