Characterizing patent big data upon IPC: a survey of triadic patent families and PCT applications

Journal of Big Data

Table 1 The basic statistics of global data and w-cores

Type	N	Min.	Q1	Med.	Q3	Max.	Avg.	Std.	Correl.
Global
IPC
PCT	2374	0	1	2	341.5	420,059	4382.39	20,831.09	0.838**
TP	2374	0	1	2	158	208,380	2172.52	10,131.21
Co-IPC
PCT	137,286	0	1	4	19	247,641	96.82	1298.37	0.860**
TP	137,286	0	1	2	11	135,449	61.57	769.09
Nation-IPC
PCT	36,610	0	1	6	46	203,726	284.08	2697.79	0.791**
TP	36,610	0	0	1	12	98,021	140.87	1342.38
W-core
IPC
PCT	155	15,508	20,999	30,136	59,299	420,059	53,570.61	63,128.09	0.891**
TP	111	11,317	14,096	21,421	41,334	208,380	34,522.39	32,397.93
Co-IPC
PCT	125	12,533	15,886	20,315	32,214	247,641	30,234.93	27,866.84	0.852**
TP	101	10,182	12,547.5	15,603	23,955	135,449	21,012.50	15,939.64
Nation-IPC
PCT	123	12,415	14,912	20,212	35,365	203,726	32,188.28	31,223.67	0.813**
TP	91	9321	12,189	15,525	24,403	98,021	20,717.88	14,454.40

The Correl. is the correlation coefficient between PCT and TP, derived from a two-sided Spearman test
*p < 0.05; **p < 0.01. The correlation between the w-cores of PCT and TP is calculated based on the overlap of two w-cores