jusletter 6 september 2004 grégoire mangeat sports media rights and competition law what are the relevant markets economics of appraisal with regard to their acquisition sale in middle 80 s popular sporting events grew importance leagues began negotiate these thus engaging an economic activity exceeding regulatory function authorities started dealing sport observing changes from point view this paper focuses upon table contents a introduction b 1 value chain sector buyer seller relations i mutual goals ii adaptation iii structural bonds iv commitment 2 characteristics profitability commercial c factors which influence deals sunk costs elasticity demand