Goodbye, data science
&gt; Nobody knew or even cared what the difference was between good and bad data science work. Meaning you could absolutely suck at your job or be incredible at it and you’d get nearly the same regards in either case.<p>In my experience it&#x27;s even a little bit worse than that. Approaches that are wrong from a statistics point of view are more likely to generate impressive seeming results. But the flaws are often subtle.<p>A common one I&#x27;ve seen quite many times is people using a flawed validation strategy (e.g. one which rewards the model for using data &quot;leaked&quot; from the future), or to rely on in-sample results too much in other ways.<p>Because these issues are subtle, management will often not pick up on them or not be aware that this kind of thing can go wrong. With a short-term focus they also won&#x27;t really care, because they can still put these results in marketing materials and impress most outsiders as well.