There is little evidence suggesting CoD and Halo are substitute goods. It's a logical explanation to jump to, but the data just doesn't back it up.
You're right about that, and all I was saying originally is that I think that the percentage of players who bought CoD and didn't buy Halo would probably choose Halo over CoD if they had to pick one (and for whatever reason, they did pick one), if they were introduced to both games with the same hype and marketing. So to say that I'm assuming they are substitute goods is wrong. I provided the sales figures to show that some people do buy CoD without buying Halo. And now that I'm explaining what I was trying to say before do you understand my opinion, whether you agree with it or not
I know I don't always say exactly what I mean at first, which I kinda sarcastically hinted at earlier in the thread. That's why I wanna be a programmer, not a journalist