According to the"National Modern Facility Agriculture Construction Plan(2023-2030)released by the Ministry of Agriculture and Rural Affairs,the"Special Implementation Plan for Modern Facility Fisheries Const...According to the"National Modern Facility Agriculture Construction Plan(2023-2030)released by the Ministry of Agriculture and Rural Affairs,the"Special Implementation Plan for Modern Facility Fisheries Construction"emphasizes the development of circular aquaculture,active expansion of green aquaculture space in facility fisheries,multi-channel development of food sources,comprehensive improvement of the quality,efficiency,and competitiveness of facility fisheries,ensuring stable and safe supply of aquatic products,and better meeting people's needs for high-quality aquatic products and beautiful aquatic ecological environment.Since the implementation of the 14th Five Year Plan for fisheries,facility fisheries have made significant progress.In order to thoroughly implement General Secretary Xi Jinping's important discourse on new quality productivity,conduct in-depth research on the current situation and existing problems of the fishery industry,and put forward suggestions to meet the requirements of high-quality development of the fishery industry in the new era.Therefore,it is crucial to continue practicing the"revitalization of aquatic seed industry"and"big food concept",take multiple measures to"demand food from rivers,lakes,and seas",and expand aquaculture space.Through research,it has been found that research in the field of facility based fisheries is still in its developmental stage.Further exploration is needed on the current status,breeding models,and experimental demonstrations of land-based facility based fisheries,in order to provide a basis for fisheries regulatory authorities to formulate the"15th Five Year Plan"for facility based fisheries.展开更多
Using the Stackelberg differential games(SDG) theory,we quantitatively study a problem of optimal intertemporal investment and tax rate design.Under some appropriate assumptions,the open-loop Stackelberg equilibrium s...Using the Stackelberg differential games(SDG) theory,we quantitatively study a problem of optimal intertemporal investment and tax rate design.Under some appropriate assumptions,the open-loop Stackelberg equilibrium solutions are obtained.Equilibrium solutions show that:1.The optimal strategies derived from differential game and unilateral optimal control approaches are different;2.It is not always the best strategy for the government to use a constant tax rate over the whole time period;3.The admissible size of tax rate adjustment may have great effect on the government's optimal strategy;4.SDG approach has no significant effect on the firm's optimal investment strategy.展开更多
基金supported by the National Bulk Freshwater Fish Industry Technology System(CARS-45-33)Tianjin Freshwater Aquaculture Industry Technology System Innovation Team(ITTFRS20211000-005/002)+2 种基金Tianjin Science and Technology Plan Project(23YDTPJC00420)Central Guiding Local Science and Technology Development Fund(24ZYCGSN00250)Open Fund of Key Laboratory of Environmental Standards and Environmental Pollution of the Ministry of Education(202007,202105).
文摘According to the"National Modern Facility Agriculture Construction Plan(2023-2030)released by the Ministry of Agriculture and Rural Affairs,the"Special Implementation Plan for Modern Facility Fisheries Construction"emphasizes the development of circular aquaculture,active expansion of green aquaculture space in facility fisheries,multi-channel development of food sources,comprehensive improvement of the quality,efficiency,and competitiveness of facility fisheries,ensuring stable and safe supply of aquatic products,and better meeting people's needs for high-quality aquatic products and beautiful aquatic ecological environment.Since the implementation of the 14th Five Year Plan for fisheries,facility fisheries have made significant progress.In order to thoroughly implement General Secretary Xi Jinping's important discourse on new quality productivity,conduct in-depth research on the current situation and existing problems of the fishery industry,and put forward suggestions to meet the requirements of high-quality development of the fishery industry in the new era.Therefore,it is crucial to continue practicing the"revitalization of aquatic seed industry"and"big food concept",take multiple measures to"demand food from rivers,lakes,and seas",and expand aquaculture space.Through research,it has been found that research in the field of facility based fisheries is still in its developmental stage.Further exploration is needed on the current status,breeding models,and experimental demonstrations of land-based facility based fisheries,in order to provide a basis for fisheries regulatory authorities to formulate the"15th Five Year Plan"for facility based fisheries.
基金This research is supported by the National Natural Science Fund of China(70371030 70372041+1 种基金 79970073) the Postdoctoral Science Fund of China, and the Key Teacher Fund of Chongqing University.
文摘Using the Stackelberg differential games(SDG) theory,we quantitatively study a problem of optimal intertemporal investment and tax rate design.Under some appropriate assumptions,the open-loop Stackelberg equilibrium solutions are obtained.Equilibrium solutions show that:1.The optimal strategies derived from differential game and unilateral optimal control approaches are different;2.It is not always the best strategy for the government to use a constant tax rate over the whole time period;3.The admissible size of tax rate adjustment may have great effect on the government's optimal strategy;4.SDG approach has no significant effect on the firm's optimal investment strategy.
