0381825 20240103201341.420121128235959.9 000308573300012 10.1016/j.eneco.2012.06.016 12 s. cav_un_epca*02504260140-9883345 (2012)1380-1391Elsevier biofuels networks minimal spanning tree hierarchical tree cav_un_auth*0256902 Krištoufek Ladislav Ekonometrie Department of Econometrics E E UTIA-B Department of Econometrics Ústav teorie informace a automatizace AV ČR, v. v. i. cav_un_auth*0106289 Janda Karel NHU-N Ekonomický ústav AV ČR, v. v. i. cav_un_auth*0284408 Zilberman D. US http://library.utia.cas.cz/separaty/2012/E/kristoufek-correlations between biofuels and related commodities before and during the food crisis a taxonomy perspective.pdf 118310 GA UK CZ cav_un_auth*0274537 GAP402/11/0948 GA ČR CZ cav_un_auth*0284442 GA402/09/0965 GA ČR cav_un_auth*0253176 IP100040 VŠE Praha CZ In this paper, we analyze the relationships between the prices of biodiesel, ethanol and related fuels and agricul- tural 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. 2013 AH 3 NHU-C AH RVO:67985556 RVO:67985998 http://hdl.handle.net/11104/0212206 ECONOMICS 1.12 2.083 Q1 69.466 92.943 Q2 Q1 2012 000308573300012 WOS cav_un_epca*0250426 Energy Economics 0140-9883 1873-6181 Roč. 34 č. 5 2012 1380 1391 Elsevier