文章对2008年以来物价变动的翘尾因素、新涨价因素，以及物价变动的成本因素进行分解，以此为视角考察未来物价的短期与中长期发展趋势。
The paper studies and analyses the tail-raising factor, new price-rising factor of price variation as well as cost factor of price variation since the beginning of 2008.
短期内，由于企业预防水平与产量的相关性，企业的安全生产状况将和煤炭价格、企业的各种变动成本、事故赔偿标准以及安全监管水平有关。
During short term, as the relationship between safety proof level and output, enterprise safety-working situation is related with coal price, variable cost, accident compensate and regulation level.
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