Dataset research

So all grant applicants are peer reviewed and this results in an impact score which is then translated to a percentile rank - is that right?

Why is it called an impact score?

Not a huge deal, but do you know which percentile method is used?

Are these percentiles across all time, or across one application period, or across one grant category/period, etc.? But always within individual "study sections", yes? Are applications randomly assigned to study sections? Are acceptance patterns consistent with this?

I'm always concerned about using percentiles because they destroy so much information in potentially misleading ways. You may want to consider a shape-preserving transformation like z-scoring or normal percentiles.

Is there a reference to the NHLBI study? Do they have their data and code available?

Rather a nasty selection bias problem - will be interesting to see what comes of it!