Why did Alassane Ouattara resign as prime minister in 1993?

Alassane Ouattara resigned as prime minister in December 1993 following a brief power struggle that occurred after the death of President Félix Houphouët-Boigny.1

Upon the president's death, the constitution mandated that Henri Konan Bédié, the president of the National Assembly, assume the presidency. Although there were efforts by some to circumvent a Bédié presidency by forming a unity government, Bédié quickly took office on the same day Houphouët-Boigny died. Two days later, Ouattara resigned from his position. He subsequently left the country in 1994 to serve as the deputy managing director of the International Monetary Fund.1