Part of the problem is that the study relies heavily on an assumed “multiplier” effect, in which every new job in energy leads indirectly to the creation of 2.5 jobs elsewhere.

部分问题在于这份研究报告严重依赖一种假定的“倍增”效应，即在能源行业每创造一份工作就会间接地在其它行业创造2.5个就业岗位。

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The peer monitoring problem is an important issue in the study of group lending.

团体贷款中的横向监督问题是团体贷款研究中的重要问题。

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The problem of statistics and estimation of disaster economic phenomena is an important prerequisite for the study of systematic engineering of natural disaster reduction and disaster economics.

灾害经济现象的统计与评估问题，是开展减灾系统工程及进行灾害经济学研究的重要前提。

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This problem is the focus of an important new study by Demographia.

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To give you an idea of how widespread the problem is, a new study to be published in the Journal of Finance and Quantitative Analysis finds that option volume in a specific stock begins to surge three days before unannounced analyst upgrades or downgrades of a company.

WSJ: Insider Trading's Smart Cheats

The problem with the study, Diet Soft Drink Consumption is Associated with an Increased Risk of Vascular Events in the Northern Manhattan Study ( Gardner et al., Journal of General Internal Medicine) is that the numbers are low enough to leave us uncertain as to whether diet drinks were the cause or simply correlated with other factors that led to these events.

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