Appendix 5—table 4. The estimated probability distribution of X, ε and Y.

	(+,+)	(+,0)	(0,+)	(0,0)
(+,+)	0.0321	0.0000	0.0208	0.0204
(+,0)	0.0038	0.0000	0.0024	0.0024
(0,+)	0.1727	0.0000	0.1121	0.1097
(0,0)	0.2293	0.0000	0.1487	0.1456