# 10x Developers - Richard Hamming, creator of Hamming Codes, believes in them: - See [[Richard Hamming - Art of Doing Science and Engineering - Learning to Learn]] for more detail. Steve McConnell, author of Code Complete, offers [this extensive analysis of the 10x research](https://www.construx.com/blog/the-origins-of-10x-how-valid-is-the-underlying-research/) and comes to the conclusion that they do, indeed, exist. Intuitively, it seems as if their do exist up to 10x differences in developer productivity. #work/notes