Obs. ID
Leader ID
COW numeric country code
COW alpha country code
leader name
Start of tenure spell
End of tenure spell
Birth date
Death date
Previous times in office
Post tenure fate
Gender
Exact date of birth. If . check yrborn for year, otherwise missing.
Year of birth. If . bornin is missing.
Exact date of death. If ., check yrdied for year, otherwise missing.
Year of death. If ., either died = . or leader is still alive.