关于该指数的每一项议题都建立在三项指标之上。

Each topic on the index is built on three indicators.

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在这三项指标中，空房率是影响价格增加的最大因素。

Of the three, vacancy rates most affect price acceleration.

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同时还调查了关于儿童的三项指标：中小学入学人数，以及各国儿童死亡率。

The study also measured three indicators for children: primary and secondary school enrollment Numbers and childhood mortality rates in each country.

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