Determine the sentiment expressed in the news from financial perspective.
Options: positive, negative

Activision Blizzard Inc. ATVI, -1.09% Chief Executive Bobby Kotick sent a letter to employees Friday, after a majority of quality assurance (QA) employees at subsidiary Raven Software chose to unionize. Kotick said the videogame maker will engage in "good faith negotiations" with the Communications Workers of America representing Raven Software employees, to enter into a collective bargaining agreement.
positive