MISSING Subcommand (PROBIT command)
PROBIT always
deletes cases having a missing value for any variable. In the output, PROBIT indicates how many cases it rejected
because of missing data. This information is displayed with the DATA
Information that prints at the beginning of the output. You can use
the MISSING subcommand to control
the treatment of user-missing values.
EXCLUDE. Delete cases
with user-missing values. This is the default. You can
also make it explicit by using the keyword DEFAULT.
INCLUDE. Include user-missing
values. PROBIT treats
user-missing values as valid. Only cases with system-missing values
are rejected.