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Using constrained optimal control to model a socially sustainable fishery
Author(s) -
Friedland René
Publication year - 2010
Publication title -
optimal control applications and methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.458
H-Index - 44
eISSN - 1099-1514
pISSN - 0143-2087
DOI - 10.1002/oca.926
Subject(s) - optimal control , mathematical optimization , constraint (computer aided design) , resource constraints , control (management) , population , bounded function , stock (firearms) , economics , capital (architecture) , mathematics , computer science , natural resource economics , engineering , geography , mechanical engineering , mathematical analysis , geometry , management , demography , archaeology , sociology
In the so‐called sole‐owner‐case of a renewable resource harvesting, it is known that the optimal policy includes a period with no harvesting, if the population is insufficiently small. Therefore, the fishermen have no income in this phase. To avoid this problem, the optimal control problem was enhanced in two different ways. First, the capital accumulation rate was bounded from below what generated a global mixed constraint. Second, lower bounds for the capital stock at a finite number of time points were introduced, which at first led to one and afterwards several isolated inequality constraints. For the resulting constrained optimal control problems, the necessary conditions were derived and an iterative algorithm was implemented to calculate the solutions in several numerical examples. Copyright © 2010 John Wiley & Sons, Ltd.