This variable indicates whether respondent entered into a fourth marriage and is in universe only if mh6=1 or 2. The marital history topical module only collects information about up to three marriges, and hence in cases where mh7=1, the fourth marriage occurred over the course of the SIPP panel, after the marital history topical module had been conducted.

0	No fourth marriage
1	Fourth marriage occurred
Sysmiss