It is rather a difficult issue for statistical agencies how to estimate price index accurately, while quality adjustment is one of those factors which influence the accuracy.

如何准确地计算价格指数成为困扰各国统计机构的一个难题，而质量调整是目前影响价格指数准确性的重要因素之一。

The average fan spends $25 – a conservative estimate based on ticket price and souvenirs.

平均球迷花费$25–根据票价和纪念品的一个保守估计。

This is an outside estimate of the price.

这是最高的估价。

Though this is well above our current estimates, it has a limited impact on the stock right now given the iPad accounts for around 7% of our estimate price estimate.

FORBES: Apple Goes To $420 As iPad Stands Erect In Me-Too Tablet Storm Of 2011

Revenues generated from the sale of oil and natural gas liquids contributes 51% of our price estimate for Exxon and a fall in oil prices could result in a significant downside to our price estimate for the stock.

FORBES: Uneven Impact On Oil Stocks From OECD Trimming Oil Demand Forecasts

The potential upside, however, would still leave our price estimate below market price.

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