There are massive incentives to lie about how much you make. It's not hard to imagine this tool will be used by HR compensation experts to determine wage parity. With that in mind, the higher the average, the better positioned you will be to negotiate a higher salary, therefore everyone who reports how much they make is ultimately incentivized to state more than they make in hopes of driving up the wage index for their field.
It would be neat if the IRS / CRA / national tax body would publish summaries based on people's actual tax returns. Although you don't specify things like industry, and other career specific quirks on your tax returns. (i.e. Ruby on Rails developer vs Dynamics CRM developer)
What's an outlier? I bet a lot of people feel they're shortchanged by about $10k, and will report that much higher to set a baseline. Outlier sounds more like "AngularJS developer making $250,000 in Cleveland"
it means more accurate baseline calculation as well as median salary which will rule out things like "AngularJS developer making $250,000 in Cleveland"
Why didn't you buy industry standard employer wage reported surveys like any employer of size does? They are readily available and the cost would be a drop in a bucket for LNKD.
