Dave Studenmund has a terrific article up at The Hardball Times today entitled Making The Most of What You've Got". A great article that looks at two important factors in creating runs: getting your runners into scoring position, and getting hits when those runners are there. Also Studes links to Tangotiger's "How Runs Are Really Created" which is a seminal piece of research.
https://www.battersbox.ca/article.php?story=20041129110937999