In the past, people focus more on communication content than on its way, which brings short-period effect.

以往人们对媒介影响的研究，关注传播内容大于传播形式，这只能看到短期效果。

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Results Obtain the estimates of treatment effect, time period effect, sequence effect and individual variation separately.

结果分别获得处理效应、阶段效应、顺序效应以及个体变异的估计。

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White said his team wanted to see whether living in greener urban areas had a lasting positive effect on people's sense of well-being or whether the effect also disappeared after a period of time.

怀特说，他的团队想知道生活在绿化较好的城市地区是否会对人们的幸福感产生持久的积极影响，还是说这种影响会在一段时间后就消失。

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Over a shorter period the effect can be even less.

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Afraid that grantees like DC would reap the benefit of these 19 years without fair compensation to authors, Congress included a termination right, allowing authors to take back the rights in their works before the extended period took effect.

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The final regulations are expected to be adopted in November following a public comment period and take effect next year.

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