An Empirical Study on the Volatility of Public Opinion on Coal Mine Safety Accidents

Songhua LI


This paper empirically studies the volatility of public opinion evolution on coal mine safety accidents based on weekly average data of coal mine accidents from January 2011 to May 2014 in Baidu search index. The findings are as follows: The volatility of public opinion evolution of coal mine safety accidents shows some characteristics such as aggregation, ARCH effect. And, the estimation of a GARCH model shows that public opinion evolution of coal mine safety accidents has conditional heteroscedasticity character, and this GARCH model successfully portrays the volatility of the public opinion on coal mine safety accidents.


Coal mine safety; Public opinion; Volatility; GARCH model

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