DavidEduardo said:New York has about 25% lower in-car listening than the average of all other markets (see caveats in another post) due to higher use of public transit, but it's the exception. In any case, the bulk of radio listening in the New York MSA is at home and at work... fully 75%.
What you're not taking into account, though, is the percentage of radio listening to Alternative stations - very few people listen to Alternative at work, and I would venture to say that an extremely high percentage of the Alternative listening base does not listen to the radio at home
Obviously, I don't have the facts to back it up, but I feel like over 50% of Alternative radio listening happens in the car, thereby giving the New York City market a HUGE disadvantage for the Alt. format