It is usually positioned as between standard economy class and business class in terms of price, comfort, and available amenities. In 1991, EVA Air was the first to introduce Evergreen Class (later renamed to Elite Class, and then to Premium Economy Class), becoming the first airline in the world to offer this class of service. It can be said that in many ways, Premium Economy class has become a standard reflection of what Economy class was like several decades ago.[1][2] In some countries, this class has emerged as a response from governments and companies requiring economy class for travel done by staff.