The history of MPP and MPA is one that is rich in tradition and experience. MPP was founded in 1937 as the Midwest Political Science Association, and its original purpose was to promote the study of politics and government. In 1969, the organization changed its name to the Midwest Political Science Association and began to offer professional development and training opportunities for its members. In 1973, MPP began to offer a certification program for public administrators, and in 1988, the organization merged with the National Association of Schools of Public Affairs and Administration (NASPAA) to form the National Association of Schools of Public Affairs and Administration (NASPAA). Today, NASPAA is the world's largest accrediting body for public affairs and administration programs.
There is no definitive answer to this question as the two acronyms can be used interchangeably in some cases. In general, however, MPP is more commonly used to refer to a Master of Public Policy degree, while MPA is more commonly used to refer to a Master of Public Administration degree.