Table 4. Correlation coefficients for mujin variables.

Variable	Variable number
	1	2	3	4	5	6	7	8
1. Participation in mujin	1	0.70	0.75	0.88	0.90	0.72	0.63	0.42
2. Maximum number of concurrent mujin memberships		1	0.62	0.66	0.66	0.59	0.52	0.43
3. Duration (y)			1	0.66	0.70	0.61	0.49	0.43
4. Meeting frequency				1	0.94	0.77	0.62	0.42
5. Is mujin fun or not?					1	0.76	0.65	0.44
6. Size (number of members)						1	0.52	0.33
7. Cost per meeting for meals and drinks (party fee)							1	0.36
8. Deposit for group financing								1

All coefficients are statistically significant (P < 0.001).