Inequality itself is not a particularly strong predictor of economic mobility, as sociologist Scott Winship noted in a recent article based on his analysis of this data.

正如社会学家斯科特·温希普在最近一篇基于对这些数据分析的文章中指出的那样，不平等本身并不是一个特别有力的经济变动性的预报器。

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Mr Winship has a number of other problems with Mr Stiglitz's figures.

Winship先生对于Stiglitz先生的数据有着一系列其它的问题。

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But a commenter quickly notes that Mr Winship made a mistake here: he used Messrs Saez and Piketty's figures for income not including capital gains.

但很快就有评论家指出温斯普在此犯了一个错误：他引用赛斯和皮凯蒂两位先生数据中的收入却没有包括资本收益所得部分。

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Winship also says it's best to consider which airlines fly out of your hometown airport and your usual travel patterns when choosing a program.

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But travelers who have been using cheap flights as a status strategy, may get bumped down -- or out -- of the game, Winship said.

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It's a win for business travelers who easily qualify for the programs through company-paid flights, Winship said, because fewer elite members means better odds for upgrades.

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