基于EMD的我國木材價格波動的影響因素分析
[Abstract]:With the rapid development of China's economy, the contradiction between the increasing scarcity of resources and the stable development of economy is becoming more and more prominent. Wood, as an important means of production, plays an important role in the development of our national economy. The correct understanding of the law of price fluctuation in wood market can make us know more about the situation of wood market in our country, which is beneficial to the healthy development of national economic construction. The data in this paper are from China Forestry Yearbook, China Forestry Statistics Yearbook and China Forestry Development report. This paper first introduces the current situation of China's wood market, including wood supply, wood consumption and wood price. Secondly, empirical mode decomposition model is established for domestic and imported wood prices, and statistical analysis of the decomposition results is carried out. Then the correlation and regression analysis model between the decomposition results and the influencing factors of wood price is established to explore the law of the fluctuation of wood price components. The main conclusions are as follows: (1) through the establishment of empirical mode decomposition model, both domestic and imported wood prices are decomposed into two intrinsic mode functions and a residual trend component. The average period of two intrinsic model functions of domestic wood price is 3 years and 6 years respectively, and that of import wood price is 2 years and 4 years, respectively. (2) through the analysis of statistics such as average period, maximum amplitude, correlation coefficient and variance contribution rate of each component, we can see that domestic wood price fluctuation is relatively stable, fluctuation amplitude is small, but import wood price fluctuation is frequent. The range of fluctuations is large. (3) through the establishment of correlation and regression models, the influence factors of various components of wood price decomposition are obtained: the small scale fluctuation factors of domestic wood price are the quantity of imported log, the import log price and the domestic wood price of the previous period. The influence factors of large-scale fluctuation are timber production, forestry investment completion, external dependence and forestry policy. The long-term trend factors are GDP growth rate, gross output value of construction industry, active stand stock and exchange rate. Small-scale fluctuations in import wood prices are affected by domestic wood prices, while large-scale fluctuations affect the number of imported logs, wood production, import wood prices in the previous period, export log prices and the completion of forestry investment. Long-term trends are influenced by exchange rates, GDP growth rates, consumer price indices and stock.
【學(xué)位授予單位】:北京林業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:F426.88
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