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The Prime Minister of Ethiopia is the fourth African premier to die this year alone. Are African leaders more likely to die in office, than their counterparts elsewhere? Also, does marriage make economic sense? (Image: Ghanaian soldiers carry the coffin of late President John Atta Mills during the funeral service at Independence Square in Accra on 10 August 2012. Credit: AFP PHOTO/PIUS UTOMI EKPEIPIUS UTOMI EKPEI/AFP/Getty Images)