The document discusses several theories of budgeting. It describes Verni Lewis' theory which is based on three principles: 1) budget decisions are made based on relative values and opportunity costs, 2) the marginal utility of additional expenditures decreases, and 3) cost-benefit analysis can determine the relative effectiveness of programs. It also discusses other economists' views of budgets as economic, political, and administrative processes. Finally, it summarizes that theoretical writings view the budget through these three frames of reference.