Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges" Plenary session 13: "Main world economic challenges"