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Good, you have included several components of a research proposal but needs refining. This is supposed to be a research proposal with a clear problem statement that will guide you to develop research questions, a hypothesis and to the right data and estimation method. Your paper is more of a literature review than a proposal. If you offer solutions based on past studies it is no more a proposal. You provided some solutions without studying the problem in your “Objectives and Solutions” section. In proposal, you can discuss expected results based on your hypothesis not solution.