A rich mixture of government incentives and fees to encourage the collection of used products and the subsequent remanufacturing has been increasingly utilized both domestically and internationally. In this paper, toward a fuller understanding of such government participation in closed-loop supply chains (CLSC\u27s), we construct and analyze a series of game-theoretic CLSC models with remanufacturing. Specifically, we investigate a basic decentralized CLSC model, two government participation models of linear incentives and fees as well as of central coordination via alternative financial instruments, and a revenue-sharing contract model without the government participation. We also analyze the impact of competition among manufacturers in ou...