What does Howard Becker mean by the term Art Worlds? When and why did he formulate the concept, and what approach to art research does it represent?

-          What is the main difference between Becker´s Art Worlds and Bourdieu´s Theory of Field?

-          What does Becker mean by conventions and how are they applied in art? Describe briefly two examples from Becker´s text

-          How can conventions change in time and what does that change mean for producers or recipients?