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Message: <blockquote data-quote="Morrus" data-source="post: 7653134" data-attributes="member: 1">It would be next to impossible.  It'd end up simply being a chart of companies with RSS feeds on their forums.  Paizo.com has one; wizards.com doesn't. Pathfinder would shoot to the top, and D&D would almost disappear. That only works if you can do them all.  And then, you're looking at trying to achieve something closer to a census than a representative sample, which isn't realistically attainable.The aim is to basically get a <a href="http://en.wikipedia.org/wiki/Statistical_sample" target="_blank">statistically significant sample</a>. The statisticians out there can comment more on what and why that is, but it's by far the most appropriate approach.Now, bear in mind that I'm not a statistican.  I'm just doing what I was told to do  by an actual statistician.  So my explanations may not be entirely  coherent!  But I've been told very strictly that including company websites would distort the data to beyond meaningless (unless I have the resources to do an actual complete census).   Now, we don't have current survey data indicating the size of the market; so that's a problem.  I'm sure it exists, but I don't have access to it.  The <a href="http://www.enworld.org/forum/content.php?1251-Adventure-Game-Industry-Market-Research-Summary-(RPGs)-V1-0" target="_blank">latest public data is from 1999</a>.  Based on that, we have a confidence interval of within a couple of percent. (That means the 0% ones aren't "none"; they're 0% +/- x%.)Fortunately, the data doesn't appear to have done. The top are D&D and Pathfinder, followed by things like 13th Age, Numenera, Edge of the Empire, new Shadowrun.    New and current stuff very clearly dominates the chart.</blockquote>

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