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cpi的概念?

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  • 山野踏歌

    CPI(居民消费价格指数)是衡量居民家庭消费品和服务价格水平变动的宏观经济指标,其核心概念如下:

    定义与作用

    CPI通过统计一篮子代表性消费品和服务(如食品、住房、交通等)的价格变化,反映居民生活成本变动趋势,是衡量通货膨胀或通货紧缩的核心指标。

    计算方法

    采用固定商品篮子法,公式为:

    $$

    CPI = \left( \frac{\text{当期价格} \times \text{商品数量}}{\text{基期价格} \times \text{基期商品数量}} \right) \times 100\%

    $$

    其中,商品篮子每五年根据居民消费习惯调整。

    分类与权重

    按城乡分别编制,涵盖八大类(食品、居住、交通等),共251个小类近千种商品。

    权重由家庭消费结构决定,城市样本约4万个家庭,农村样本约6万个家庭。

    与通货膨胀的关系

    CPI涨幅超过3%通常视为温和通胀,超过5%为严重通胀。

    通过CPI变化可观察货币实际购买力变化。

    局限性

    仅反映居民消费领域,无法全面体现整体物价水平(如生产领域价格变动)。

    2025-11-26 11:42:18
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