I recall an article 2 or 3 years ago where a consultant estimated a cost of something like $4 billion in lost productivity due to the tournament, and I'm sure a lot of companies jumped on the bandwagon due to that. While I'm sure there is some dip in productivity, I remember his assumptions failed to consider that people waste time every day and that these people are likely checking on the tournament results when they would normally be doing something non-work related anyway. Also if I remember correctly, he estimated something like 60 million people watching while the ratings showed it was only around 15-20 million.