sentences:  teem has already achieved the position of market leader in the energy training segment as it convinces delegates with its up-to-date and compact contentcs as well as its great value for money.Price stiffness could be considered the "opposite" of the price elasticity function.While the price elasticity is a measure indicating the change of the demand or supply given a certain change in the price, the "price stiffness" used by EXAA is set out to determine the impact of a change in the supply and demand structure on the market clearing price.