کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5065025 | 1372302 | 2012 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Correlations between biofuels and related commodities before and during the food crisis: A taxonomy perspective Correlations between biofuels and related commodities before and during the food crisis: A taxonomy perspective](/preview/png/5065025.png)
In this paper, we analyze the relationships between the prices of biodiesel, ethanol and related fuels and agricultural commodities with a use of minimal spanning trees and hierarchical trees. To distinguish between short-term and medium-term effects, we construct these trees for different frequencies (weekly and monthly). We find that in short-term, both ethanol and biodiesel are very weakly connected with the other commodities. In medium-term, the biofuels network becomes more structured. The system splits into two well separated branches - a fuels part and a food part. Biodiesel tends to the fuels branch and ethanol to the food branch. When the periods before and after the food crisis of 2007/2008 are compared, the connections are much stronger for the post-crisis period. This is the first application of this methodology on the biofuel systems.
⺠Relationship between biodiesel, ethanol, related fuels and feedstock is analyzed. ⺠Minimal spanning trees are used on biofuels system for the first time. ⺠Links are analyzed at different frequencies. ⺠Links are analyzed in different time periods. ⺠Links are frequency and time dependent.
Journal: Energy Economics - Volume 34, Issue 5, September 2012, Pages 1380-1391