A consumer price index (CPI) measures changes in the price level of consumer goods and services purchased by households. The CPI in the United States is defined by the Bureau of Labor Statistics as "a measure of the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services."

The CPI is a statistical estimate constructed using the prices of a sample of representative items whose prices are collected periodically. Sub-indexes and sub-sub-indexes are computed for different categories and sub-categories of goods and services, being combined to produce the overall index with weights reflecting their shares in the total of the consumer expenditures covered by the index. It is one of several price indices calculated by most national statistical agencies. The annual percentage change in a CPI is used as a measure of inflation. A CPI can be used to index (i.e., adjust for the effect of inflation) the real value of wages, salaries, pensions, for regulating prices and for deflating monetary magnitudes to show changes in real values. In most countries, the CPI is, along with the population census and the USA National Income and Product Accounts, one of the most closely watched national economic statistics.

Laurent Gbagbo (Gagnoa Bété: Gbagbo [ɡ͡baɡ͡bo]; French pronunciation: [loʁɑ̃ kudu baɡbo]; born 31 May 1945) was the fourth President of Côte d'Ivoire of ethnic Bété from 2000 until his arrest in April 2011. A historian by profession, he is also an amateur chemist and physicist.

Gbagbo was imprisoned in the early 1970s and again in the early 1990s, and he lived in exile in France during much of the 1980s as a result of his union activism. Gbagbo founded the Ivorian Popular Front (FPI) in 1982 and ran unsuccessfully for President against Félix Houphouët-Boigny at the start of multi-party politics in 1990. He also won a seat in the National Assembly of Côte d'Ivoire in 1990.

Gbagbo claimed victory after Robert Guéï, head of a military junta, barred other leading politicians from running against Gbagbo in the October 2000 presidential election. Gbagbo supporters took to the streets, toppling Guéï. Gbagbo was then installed as President.

Following the 2010 presidential election, Gbagbo challenged the vote count, alleged fraud, and refused to stand down. He called for the annulment of results from nine of the country's regions. Alassane Ouattara was declared the winner and was recognized as such by election observers, the international community, the African Union (AU), and the Economic Community of West African States. However, the Constitutional Council, which according to Article 94 of the Ivorian Constitution both determines disputes in and proclaims the results of Presidential elections, declared that Gbagbo had won. After a short period of civil conflict, Gbagbo was arrested by the Republican Army of Ivory Coast. In November 2011, he was extradited to the International Criminal Court, becoming the first head of state to be taken into the court's custody.

Charles Blé Goudé (1 February 1972) is an Ivorian political leader, born at Guibéroua, in the center west of the country.

Blé Goudé studied English at the University of Cocody (Cocody is a section of Abidjan), where he began his political career leading strikes and peaceful demonstrations of the Student Federation of Cote d'Ivoire (FESCI), allied with the FPI during the 1990s. He succeeded Guillaume Soro as the Secretary General of FESCI from 1998 to 2000. He later founded the Coordination des jeunes patriotes in 2001, and the Congrès Panafricaine des Jeunes Patriotes (COJEP) in the same year. He had completed a university degree in English by this time, and later began a masters degree in Conflict Resolution Studies from Manchester University. Having gotten news of the coup d'État on 19 September 2002, he left England for Côte d'Ivoire, where he founded the Alliance des jeunes patriotes pour le sursaut national, which he directed with Serge Kuyo, an organization which he described as a pressure group.