Regions of Embarkation and Disembarkation
The above procedures generate imputed figures, where necessary, for the data used to produce series of slave departures and arrivals for eight different regions in Africa and sixty-four different regions of disembarkation. The variables “Total slaves embarked*” (SLAXIMP) and “Total slaves disembarked*” (SLAMIMP) incorporate these imputed data. “Total slaves embarked” is derived first from the data variable, “Total slaves embarked” (TSLAVESD). When values for this are not available, then a SLAXIMP value is derived from the sum of values available for “Slaves carried from first port of purchase” (NCAR13), “Slaves carried from second port of purchase” (NCAR15), and “Slaves carried from third port of purchase” (NCAR17)--in other words, the slaves embarked at up to three ports in Africa where these are available. If these data are incomplete or missing then SLAXIMP draws from the data variable “Number of slaves arriving at first place of landing” (SLAARRIV) adjusted for voyage mortality (imputed, if necessary), and finally, if this is not available then “Total slaves purchased” (TSLAVESP) – a variable available only in the downloadable database is used. Only if none of these data variables can provide adequate information, does SLAXIMP incorporate one of the imputed values in the Appendix table. Similarly SLAMIMP is derived first from SLAARRIV, then, if necessary, from the sum of “Number of slaves disembarked at first place of landing “ (SLAS32), “Number of slaves disembarked at second place of landing “ (SLAS36), and “Number of slaves disembarked at third place of landing “ (SLAS39) - in other words the slaves disembarked at up to three ports at the completion of the Middle Passage. All four of these are data variables. If these are blank, then SLAMIMP draws on TSLAVESD when available, adjusted for shipboard mortality (again, imputed, as necessary). As with SLAXIMP, SLAMIMP resorts to the imputed values in the Appendix table only when sources do not document the number of Africans who were disembarked.
Regions of Embarkation and DisembarkationThe above procedures generate imputed figures, where necessary, for the data used to produce series of slave departures and arrivals for eight different regions in Africa and sixty-four different regions of disembarkation. The variables “Total slaves embarked*” (SLAXIMP) and “Total slaves disembarked*” (SLAMIMP) incorporate these imputed data. “Total slaves embarked” is derived first from the data variable, “Total slaves embarked” (TSLAVESD). When values for this are not available, then a SLAXIMP value is derived from the sum of values available for “Slaves carried from first port of purchase” (NCAR13), “Slaves carried from second port of purchase” (NCAR15), and “Slaves carried from third port of purchase” (NCAR17)--in other words, the slaves embarked at up to three ports in Africa where these are available. If these data are incomplete or missing then SLAXIMP draws from the data variable “Number of slaves arriving at first place of landing” (SLAARRIV) adjusted for voyage mortality (imputed, if necessary), and finally, if this is not available then “Total slaves purchased” (TSLAVESP) – a variable available only in the downloadable database is used. Only if none of these data variables can provide adequate information, does SLAXIMP incorporate one of the imputed values in the Appendix table. Similarly SLAMIMP is derived first from SLAARRIV, then, if necessary, from the sum of “Number of slaves disembarked at first place of landing “ (SLAS32), “Number of slaves disembarked at second place of landing “ (SLAS36), and “Number of slaves disembarked at third place of landing “ (SLAS39) - in other words the slaves disembarked at up to three ports at the completion of the Middle Passage. All four of these are data variables. If these are blank, then SLAMIMP draws on TSLAVESD when available, adjusted for shipboard mortality (again, imputed, as necessary). As with SLAXIMP, SLAMIMP resorts to the imputed values in the Appendix table only when sources do not document the number of Africans who were disembarked.
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