This article informs users how the quarter three 2012 preliminary estimate of gross domestic product was compiled including details of the assumptions made to calculate the estimate. This includes a review of the pattern of the key GDP components between June and September to help explain the decisions that have been made. The article also assesses what impact the Olympics and Paralympics may have had on different sectors of the economy and compares the impacts of the Sydney 2000 and London 2012 Games on the Australian and UK economies.
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