The following research is about the retirement plans in the past, the changes that have occurred, and the predicted changes that will happen in the future. Also, it includes studies of how the roles of unions impacted public pensions and how it changed over time. It has examinations of what has been written on public sector pensions in the U.S. and a brief introduction and history of pension plans. There are collections of data on the generosity of state pension plans (i.e. pension formulas). The goals of gathering information on public sector pensions and collecting the formulas by state was to find out the differences of pension plans by state and looking overall at what scholars think about future U.S pension plans.