With respect to the impartiality of his electoral projections, Silver stated, "Are [my] results biased toward [my] preferred candidates? I have tried to disclose as much about my methodology as possible".
PECOTA projections were first published by Baseball Prospectus in the 2003 edition of its annual book as well as online by Baseball
Silver produced the PECOTA forecasts for each Major League Baseball season from 2003 through 2009.
In 2000, Silver graduated with Honors with a Bachelor of Arts degree in economics from the University of Chicago.
He also wrote for the Chicago Weekly News and the Chicago Maroon.
When asked in 2009, "What is your biggest regret in life?
" Silver responded, "Spending four years of my life at a job I didn't like".
Silver set out to analyze quantitative aspects of the political game to enlighten a broader audience. I saw a lot of discussion about strategy that was not all that sophisticated, especially when it came to quantitative things like polls and demographics'".
Silver reports that "he was stranded in a New Orleans airport when the idea of Five Thirty came to him. On March 7, 2008, while still writing as "Poblano," Silver established his own blog, Five Thirty
While employed at KPMG, Silver continued to nurture his lifelong interest in baseball and statistics, and on the side he began to work on his PECOTA system for projecting player performance and careers.
He quit his job at KPMG in April 2004 and for a time earned his living mainly by playing online poker.
Unlike most other baseball projection systems, PECOTA relies on matching a given current player to a set of "comparable" players whose past performance can serve as a guide to how the given current player is likely to perform in the future.