2000: 1% errorSo far as I have been able to determine, we were the first to use aggregated moving averages - a trick I picked up from stock analysis - with Real Clear Politics starting to use them in 2004. It's simple, works and frees your time even if it's not as impressive as some prefer.
2004: 3% error
2008: 0.8% error
2012: 1.14% error
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