Using Unstructured VAR model, along with Qualitative analysis, this paper analyzed factors which influenced China＇ s grain product prices under the Open Framework from 2003 to 2013. It is found that domestic grain prices are mainly affected by its own lags. The imports have the biggest impact on domestic grain prices; relatively the impact from exports is much smaller. Meanwhile the price fluctuations of agricultural production means can result in significant fluctuations of domestic grain prices,but its contribution degree is lower than grain...
