專業(yè)市場(chǎng)價(jià)格指數(shù)誤差控制研究
[Abstract]:The position of professional market in our market economy is improving constantly. The compilation of professional market price index plays an important role in improving the efficiency of professional market management, especially in fighting for the right of trade price discourse. However, the professional market price index in our country is not professional, the error of the index is large, and the accuracy is not high, which seriously limits the function of the index. How to control the errors of the professional market price index and ensure the accuracy of the index has become an urgent problem that needs to be solved in the compilation of the specialized market price index. This paper will study this problem. This paper includes the following four aspects: first, the concept of the professional market, the characteristics of the professional market price index and the error source of the professional market price index are discussed to lay the foundation for further research; Secondly, according to the characteristic and error source of the professional market price index, the paper puts forward the error control method system which is suitable for the professional market price index, which is the sampling simulation method to control the sampling error of the enterprise. The error of base period adjustment is controlled by regression analysis and the error of formula selection is controlled by stochastic exponential method. Thirdly, taking the compilation of Z copper market price index as an example, the error control is carried out by using the above method. Fourthly, the effect of error control of price index in Z copper market is evaluated to test the effectiveness of the error control method proposed by the research. The main conclusions of this paper are as follows: first, adopting sampling simulation technology can solve the problem of exponential error caused by the structural deviation of sampling enterprises caused by the complexity of enterprise classification marks in professional market; Secondly, taking the confidence interval of regression analysis as the reference to judge whether the base period should be replaced or not, we can solve the problem of exponential error caused by the large fluctuation of the price of the professional market and the uncertainty of the transition period of the base period. Thirdly, the problem of exponential error caused by the failure of formula selection caused by product complexity in professional market can be solved by using stochastic exponential method. To sum up, the expert price index error control method proposed by the research is effective in reducing the index error and improving the index accuracy. The innovation of this paper is reflected in the following aspects: first, we try to design and complete the sampling simulation method by combining computer technology with statistical technology, starting with the enterprise sampling method, which is the time of big data. How to use computer simulation technology to complete the best sample extraction is provided. Secondly, the feasibility of the traditional fixed time adjustment base period in the professional market is questioned, and the hypothesis is put forward that there is a linear regression relationship between the base period change rate and the index change rate. According to the confidence interval of regression model, we can judge whether to adjust the base period, and give the adjustment method of the professional market price index. Thirdly, the stochastic index method is extended to the specialized market for the first time, and the formula for compiling the price index of Z copper specialized market is selected by using the stochastic index method. It provides a reference for the stochastic index method to solve the problem of compiling other price indices. Fourthly, the sampling simulation method and the calculation package of random exponent method are developed for the first time in China by using R software, which can provide convenience for other exponent compilers and promote the popularization and application of R software in China.
【學(xué)位授予單位】:華南理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:F726
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