Consumer Price Indices and Inflation Rates-October 2009

About Report

Statistical Releases
CPI and Inflation Rates
October
2009

Overview

Over the years, Kenya National Bureau of Statistics has been releasing the CPI and inflation figures based on arithmetic mean computation method. However, this approach has been found not to be robust in the sense that it is influenced by outliers. As a result, and in line with best practices as recommended in the ILO CPI manual 2004, the Bureau has adopted a geometric mean computation approach. As can be seen from the figure below, the effect of the outliers is clearly demonstrated since the trends echo each other. The old methodology would have yielded an October inflation of 17.5 percent.
Consumer Price Indices and Inflation Rates-October 2009

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