Jerry G. Thursby et al. have published "Prepublication Disclosure of Scientific Results: Norms, Competition, and Commercial Orientation" in Science Advances.
Here's an excerpt:
On the basis of a survey of 7103 active faculty researchers in nine fields, we examine the extent to which scientists disclose prepublication results, and when they do, why? Except in two fields, more scientists disclose results before publication than not, but there is significant variation in their reasons to disclose, in the frequency of such disclosure, and in withholding crucial results when making public presentations.