Kenyan pollster Ipsos explains why they missed the mark

Today Ipsos Synovate provided their own internal analysis (see here, pdf) of the election results vis-a-vis their poll numbers right before the March 4th election.

According to the final IEBC tally (Which Mr. Odinga is challenging in court) all the eight candidates except Mr. Kenyatta performed within the margin of error of Ipsos’ last poll before the election.

Mr. Kenyatta outperformed the last poll by 5.25%, well outside the margin of error.

How did Ipsos miss this?

Their answer on page 23 basically agrees with my observation that differential turnout, especially in the candidates’ respective strongholds, made the difference.

According to the final IEBC numbers, Mr. Kenyatta’s 20 biggest vote-basket counties averaged a turnout rate of 88%, compared to Mr. Odinga’s 84%.

In related news, tomorrow Mr. Odinga will officially file the petition that seeks to nullify Mr. Kenyatta’s election as president.

CORD may seek the nullification of the whole election or narrow their challenge to just whether Mr. Kenyatta actually crossed the 50% threshold.

Crucial figures to think about as we await to see the content of the petition tomorrow are (1) 10.6m votes were cast in the 47 governor races compared to 12.3m in the presidential race, a difference of 1.7m votes; and (2) Mr. Kenyatta crossed the 50% threshold by less than 10,000 votes.

More on this next week.