Asymmetric Price Volatility Transmission in Agricultural Supply Chains: Evidence from the Chinese Pork Market

Table 1

Zivot–Andrews unit root test results.

Variables	ZA-statistics	Breakpoints	Coefficients	t-statistics	p-values
	−4.066	2007M03	0.447	2.076	0.039
	−4.372	2007M03	0.325	2.894	0.004
	−4.502	2007M03	0.434	3.164	0.002
	−3.908	2007M03	0.032	2.492	0.013
	−4.061	2006M06	0.034	3.191	0.002
	−4.211	2007M03	0.028	3.105	0.002
	−7.767	2006M05	0.023	2.026	0.044
	−8.955	2008M04	−0.018	−1.780	0.077
	−10.422	2006M06	0.015	1.734	0.084

Note. The critical values of the ZA test at 1% and 5% significance levels are −5.340 and −4.800, respectively. The coefficients, t-statistics, and p values are breakpoint’s related statistics in the equation of the ZA test. , , and indicate statistical significance at the 10%, 5%, and 1% level, respectively.