Unsupervised clustering of bitcoin transactions

Financial Innovation

Table 3 Correlation matrix for initial features

	Inputs	Outputs	Amount	OP_RETURN	Fees	Coinbase dist.	CoinJoin dist.
Outputs	− 0.048
	(0.033)
Amount	− 0.009	0.016
	(0.700)	(0.471)
OP_RETURN	− 0.016	− 0.001	− 0.020
	(0.484)	(0.954)	(0.360)
Fees	− 0.057	− 0.026	0.097	0.051
	(0.011)	(0.240)	(0.009)	(0.023)
Coinbase dist.	0.018	0.025	− 0.027	0.015	− 0.032
	(0.469)	(0.307)	(0.291)	(0.511)	(0.187)
CoinJoin dist.	0.015	0.009	− 0.002	− 0.007	0.003	− 0.004
	(0.484)	(0.698)	(0.653)	(0.752)	(0.615)	(0.598)
Blocks Unspent	0.008	− 0.005	0.004	− 0.012	0.012	0.021	− 0.007
	(0.699)	(0.813)	(0.858)	(0.512)	(0.520)	(0.357)	(0.714)