Each key aspect of this system has been used and analyzed in other areas. Oregon was the first state to use an equal voting method on a statewide ballot for a 1990 referendum on five different options for school funding. Approval Voting is used to select the Secretary General of the United Nations and by lots of people who know math: the Mathematical Association of America (MAA), the American Mathematical Society (AMS) and the American Statistical Association (ASA). The Top Two portion of the Oregon Open Primary is used currently in California, Washington and Louisiana, where it has been credited with reducing partisanship in elected bodies.
The use of the two systems in combination will be an Oregon first.