This may not be appropriate for this site, I couldn't tell from the FAQ or a quick search on meta. I am looking for the proper attribution, origin, and correct version of the quote:
That which is measured, improves.
I've seen various versions and attributions to different people.
Some versions of it:
Pearson's Law: "That which is measured improves. That which is measured and reported improves exponentially." - Karl Pearson
"When performance is measured, performance improves. When performance is measured and reported back, the rate of improvement accelerates." - Thomas S. Monson
A few sources say it was used often at Sun Microsystems but do not attribute it to anyone.