In Ethiopia, growth in cereal production is accompanied by a more than proportionate increase in the standard deviation of production. This study applies descriptive and variance decomposition procedures to determine the sources of increased instability in cereal production in order to show...

By using Census x12 Seasonal Adjustment Method and Hodrick-Prescott Filter Method, Frequency (band-pass) Filter Method, it was found that there are obvious and regular seasonal feature in the fluctuation of pork price in China; Unexpected event or contingency shocks affect pork price...