Ask HN: Why aren't there any business-related Q&A sites?

Would somebody enlighten me, why I can't find any Q&A sites for business-related matters (such as: market research, marketing, business development), similar to what stackoverflow is to programming?

Is it because traditional businesses handle this knowledge as intellectual property, rather than an attention economy, or is it because they think it's their competitive advantage?

In either case, are there any particular reason, why applying collective intelligence to this field in a way similar to SO would not work?