Horizontal inequality by ethnic group has remained remarkably persistent for wealth, education, and access to certain services in Nigeria. While significant gains in the reduction of inequality and improvement in access have been made for more locally administered services, outcomes are stickier...

Inequalities between ethnic or racial groups, defined as horizontal inequalities, are pervasive and persistent. They persist due to cumulative and reinforcing inequalities arising from unequal access to different types of capital. Affirmative action policies can provide promising opportunities...