Designing the Novel Imported Pork Producer Declaration Price Index Using Chinese Customs Import Declarations

Table 7

Correlation coefficients of PPI_IPD and market prices in different dimensions.

Time dimension	Two months in advance	One month in advance	Synchronization	One-month lag	Two-month lag
PPI IPD	0.67414	0.66292	0.72394	0.73974	0.69646
PPI IPD	10 0.68669	0.67052	0.72742	0.74818	0.70950
PPI IPD	20 0.68464	0.66813	0.72118	0.74101	0.70598