To Effect

1. (transitive) To make or bring about; to implement.
2. Misspelling of affect.

Usage notes

Effect is often confused with affect. The latter suggests influence over existing ideas, emotions and entities; the former indicates the manifestation of new or original ideas or entities:

• “New governing coalitions have effected major changes” indicates that major changes were made as a result of new governing coalitions.
• “New governing coalitions have affected major changes” indicates that before new governing coalitions, major changes were in place, and that the new governing coalitions had some influence over those existing changes.