2PANZNER MJ. Financial armageddon:protecting your future from four impending catastrophes[M]. New South Wales:Ka- plan Business, 2007.
3HUANG J, QIN H, SCOTT R. More pain ahead for China's I food prices [J]. Far Eastern Economic Review, 2008,171 (5) : 8-13.
4DERESSA T, HASSAN R M. Economic impact of climate change on crop production in Ethiopia:evidence from cross-sec- tion measures [J]. Journal of African Economies, 2009(4): 529-554.
5KELBORE Z G. Climate change, crop yield variability and food price volatility in Sub-Saharan Africa: the ethiopian case [R]. Trento and Rovereto: Cifrem, University of Trento, 2011.