Once upon a time, a book entitled Moneyball hit the shelves, and with it came a storm of debate over the relative merits of college vs. high school prospects. Michael Lewis' bestseller, though a tad sensationalistic in tone, uncovered a market inefficiency that the A's were expoliting- the drafting of college players over high school players produced a higher return on investment. A study by Rany Jazayerli of Baseball Prospectus concluded as much. In a study of drafts between 1984-1991, Jazayerli concluded that the average return on investment for a college player was substantially higher than that of a high school player.
However, that same study by Jazayerli concluded that as the years have passed, the gap between the college and high school players has become nonexistent:
"I'm man enoug...

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