Seasonal Harvest Patterns in Multispecies Fisheries

Birkenbach, Anna M.; Cojocaru, Andreea; Asche, Frank; Guttormsen, Atle G.

doi:10.1007/s10640-020-00402-7

Cited by 50 publications

(41 citation statements)

References 62 publications

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“…Periodicity in applied work in bioeconomics is often treated as short-term (intra-seasonal) dynamics, where considerable progress has been made in developing models to analyze inter-annual or within-season inefficiencies [ 16 , 17 ]. In these models, natural population growth and discounting processes are frequently ignored.…”

Section: Discussionmentioning

confidence: 99%

“…As indicated by Birkenbach et al . [ 17 ], these processes are more significant for the inter-season perspective, as developed in Kvamsdal et al . [ 1 , 3 ].…”

Section: Discussionmentioning

confidence: 99%

“…That is, each agent maximizes the net present value of present returns, P k (x, u), where the price they obtain depends on the total market supply, plus the discounted future value of their capital stock. Eq (17) defines an equation set that can be solved using our iterative approach. The significance of this example is that we can obtain a formal solution that yields an exact solution for certain parameter values.…”

Section: A Dynamic Game Of Supplymentioning

confidence: 99%

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A contraction approach to dynamic optimization problems

et al. 2021

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An infinite-horizon, multidimensional optimization problem with arbitrary yet finite periodicity in discrete time is considered. The problem can be posed as a set of coupled equations. It is shown that the problem is a special case of a more general class of contraction problems that have unique solutions. Solutions are obtained by considering a vector-valued value function and by using an iterative process. Special cases of the general class of contraction problems include the classical Bellman problem and its stochastic formulations. Thus, our approach can be viewed as an extension of the Bellman problem to the special case of nonautonomy that periodicity represents, and our approach thereby facilitates consistent and rigorous treatment of, for example, seasonality in discrete, dynamic optimization, and furthermore, certain types of dynamic games. The contraction approach is illustrated in simple examples. In the main example, which is an infinite-horizon resource management problem with a periodic price, it is found that the optimal exploitation level differs between high and low price time intervals and that the solution time paths approach a limit cycle.

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Section: Discussionmentioning

confidence: 99%

“…As indicated by Birkenbach et al . [ 17 ], these processes are more significant for the inter-season perspective, as developed in Kvamsdal et al . [ 1 , 3 ].…”

Section: Discussionmentioning

confidence: 99%

Section: A Dynamic Game Of Supplymentioning

confidence: 99%

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A contraction approach to dynamic optimization problems

et al. 2021

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“…2. There are also examples of fisheries that stop using ecolabels as shown by Blomquist et al (2020).…”

Section: Discussionmentioning

confidence: 99%

“…This makes coordination in the supply chain especially important (Kvaløy & Tveterås, 2008), and has led to the use of risk reducing instruments, such as contracts (Larsen & Asche, 2011) and futures (Asche, Misund, & Oglend, 2016), and avoiding auctions-a transaction mechanism that is much more common for wild fish (Sogn-Grundvåg, Zhang, & Iversen, 2019). On the other hand, the control over the production process allows salmon farmers to have product available year round, with minimal exposure to seasonality in production as is the case in wild fish production (Bertheussen & Dreyer, 2019;Birkenbach, Cojocaru, Asche, Guttormsen, & Smith, 2020). This means that there will always be a company able to supply salmon if one is willing to pay the price (Oglend & Straume, 2019;Straume, Landazuri-Tveteraas, & Oglend, 2020).…”

Section: Introductionmentioning

confidence: 99%

Brands, Labels, and Product Longevity: The Case of Salmon in UK Grocery Retailing

Asche

Sogn‐Grundvåg

Zhang

et al. 2021

Journal of International Food & Agribusiness Marketing

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In recent years, the number of ecolabels and country-of-origin labels has grown substantially in seafood markets globally. This makes it more difficult for retailers and producers to communicate and demonstrate their differentiating claims to consumers. In addition, it has recently been suggested that there are both costs and supply chain benefits associated with labeling. This paper uses duration analysis to investigate factors that influence product longevity for salmon in grocery retailing. Product longevity influences cost as a prolonged product lifetime reduces costs related to product development and marketing. As has been found for wild-caught whitefish, different retail chains appear to vary in their product labeling strategies. However, in contrast to wild fish, farmed salmon with ecolabels or domestic country-of-origin labels appear to have shorter product life cycles compared to products without ecolabels or with foreign country-of-origin labeling. This is most likely due to the higher control of the production process found in aquaculture.

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Economic gains from individual fishing quotas: The Norwegian coastal groundfish fisheries

Liu,

Pincinato,

Asche

et al. 2024

J of Agr & App Econ Assoc

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Many rights‐based systems in fisheries use individual fishing quotas (IFQs) that allocate shares of total allowable catch to individual fishers, vessels, or groups of fishers. We analyze the performance of IFQs in the Norwegian coastal groundfish fisheries that substantially limit transferability. We use data from two similar fishing groups that were treated with different management. Difference‐in‐differences results show that IFQs increase productivity and prices for some of the main groundfish species. Results suggest that expected productivity gains and price gains from first‐best rights‐based policies that create highly transferable IFQs can result from second‐best policies that substantially limit transferability.

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Seasonal Harvest Patterns in Multispecies Fisheries

Cited by 50 publications

References 62 publications

A contraction approach to dynamic optimization problems

A contraction approach to dynamic optimization problems

Brands, Labels, and Product Longevity: The Case of Salmon in UK Grocery Retailing

Economic gains from individual fishing quotas: The Norwegian coastal groundfish fisheries

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