Blar i Department of Business and Management Science på forfatter "Ni, Yuanming"
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Essays on fishery management
Ni, Yuanming (Doctoral thesis, 2019-11) -
Greed is good: from super-harvest to recovery in a stochastic predator-prey system
Ni, Yuanming; Sandal, Leif K.; Kvamsdal, Sturla F.; Poudel, Diwakar (Discussion paper;5/19, Working paper, 2019-09-04)This paper demonstrates a predator-prey system of cod and capelin that confronts a possible scenario of prey extinction under the first-best policy in a stochastic world. We discover a novel ‘super-harvest’ phenomenon that ... -
Optimal fishing mortalities with age-structured bioeconomic model - a case of NEA mackerel
Ni, Yuanming; Steinshamn, Stein I. (Discussion paper;9/16, Working paper, 2016-05-31)The effects of random environmental impacts on optimal exploitation of a fish population are investigated using both optimization and simulation, based on a discrete-time age-structured bioeconomic model. The optimization ... -
Optimization of age-structured bioeconomic model: recruitment, weight gain and environmental effects
Ni, Yuanming (Discussion paper;4/19, Working paper, 2019-09-03)More and more fishery researchers begin to acknowledge that one-dimensional biomass models may omit key information when generating management guidelines. For the more complicated age-structured models, numerous parameters ... -
Seasonality matters: a multi-season, multi-state dynamic optimization in fishery
Ni, Yuanming; Sandal, Leif K. (Discussion paper;2/18, Working paper, 2018-02-12)Many biological and economic processes in fishery happen seasonally. Most of the extant literature tends to neglect this fact. This work is an initial attempt to treat seasonality in a systematic and proper way. We apply ... -
The global potential for carbon capture and storage from forestry
Ni, Yuanming; Eskeland, Gunnar; Giske, Jarl; Hansen, Jan Petter (Journal article; Peer reviewed, 2016)Discussions about limiting anthropogenic emissions of CO2 often focus on transition to renewable energy sources and on carbon capture and storage (CCS) of CO2. The potential contributions from forests, forest products and ...