Not only do comments and stories probably not take equal work, but there are unequal numbers of stories and comments. This is an issue because the goal is to m

Not only do comments and stories probably not take equal work, but there are unequal numbers of stories and comments. This is an issue because the goal is to maximize karma per unit of effort, so the question is how does the expected_karma_per_submission to expected_karma_per_comment ratio compare to the work_per_submission to work_per_comment ratio. Finally, submissions are assymetric in the sense that they can only be voted up. This is hard to capture in the above ratios. Submit some mindless articles and you will collect no karma on most - but you will get a few points here and there, and in aggregate your karma will increase. Submit a similar number of mindless comments and you'll net lose a bunch of karma.