MCZ function

Example dataframe for structrual zeros based on the NYMockexample dataset.

Example dataframe for structrual zeros based on the NYMockexample dataset. It contains 8 structural zero cases with 10 variables.

[,1]	AGE = 15 and EDUC = 8
[,2]	AGE = 16 and VESTAT = 2
[,3]	OWNERSHIP = 0 and MORTGAGE = 4
[,4]	AGE = 17 and EDUC = 11
[,5]	AGE = [36, 50] and EMPSTAT = 0
[,6]	AGE > 70 and DISABWRK = 0
[,7]	AGE < 15 and EDUC = 10
[,8]	OWNERSHIP = 2 and MORTGAGE = 1