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There are usually three methods for supplier slecetion, they have their own characteristics and are suitable for different environmental requirements. In real economic activity, supplier selection usually take place in the environment with insufficient information, the evaluation indicators of which show both the quantitative and qualitative characteristics. Grey system theory solved the evaluation...
The theory of quadratic variation suggests that, realized volatility is an unbiased and highly efficient estimator of return volatility under suitable conditions. In this article, we compare the realized logarithmic volatilities models VAR-RV and AR-RV computed from high-frequency intra-period data with the traditional daily return evaluation models VAR-R and Daily-GARCH in China A-stock market. The...
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