Duncan Thomas|I Muvandi
The demographic transition in southern Africa: another look at the evidence from Botswana and Zimbabwe.
RAND Corporation|African Centre for Technology Studies
botswana zimbabwe acclaimed vanguard demographic transition subsaharan africa paper examines comparability cps dhs data country finds part observed decline aggregate fertility rates countries attributed differences sample composition women cohort tend better educated second survey relative first fact explains partbut allof observed fertility decline example appears account half observed decline among women age 2534 1984 zimbabwe