“And, as anyone who’s done these sorts of experiments knows, you often see improvements well in excess of 10%. To take a silly example, Dustin Curtis experimented with getting more readers of his weblog to follow him on Twitter. After four experiments, he’d achieved a 173% improvement. And even this is probably underestimating things. I expect many nonprofits are not accomplishing their goals at all. Even if they made a little bit of progress, their improvement would be mathematically infinite. (It’s also quite possible that many nonprofits are actually being counter-productive. After all, before we started measuring the effects of medical treatment, we were bleeding people with leeches.)” - × × ×