Studies on paused exercises

Are there any studies on pausing at either end range for a short time? Best I can find are some with 20 second pauses between reps, such as …

… which are obviously quite different from 2 count pauses.

I’m not aware of any studies comparing briefly paused variations to non-paused variations.

As you program lots of paused variations, what do you consider the pros and cons of it, other than providing exercise variety?

Specifically interested in what I have noticed from personal experience is that when doing high rep sets (15+), even a few pauses towards the end of a set increase number of reps significantly (25%+). Is this an effective way to accrue tonnage?