Catch, stock elasticity and an implicit index of fishing effort
Economists are interested in the relationship between fishing effort and stock size, and how these impacts catch levels. The interest lies in the stock elasticity where it is thought that for pelagic fish species it is close to zero and for demersal fish stocks closer to one. We statistically model...
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ftnorgehandelshs:oai:openaccess.nhh.no:11250/166688 2023-05-15T14:30:27+02:00 Catch, stock elasticity and an implicit index of fishing effort Ekerhovd, Nils-Arne Gordon, Daniel V. 2013-09 application/pdf http://hdl.handle.net/11250/166688 eng eng SNF Working paper;25/13 http://hdl.handle.net/11250/166688 stock elasticity fishing effort age class catchability coefficients VDP::Social science: 200::Economics: 210::Economics: 212 Working paper 2013 ftnorgehandelshs 2021-10-19T20:06:05Z Economists are interested in the relationship between fishing effort and stock size, and how these impacts catch levels. The interest lies in the stock elasticity where it is thought that for pelagic fish species it is close to zero and for demersal fish stocks closer to one. We statistically model and estimate the relationship between stock size and catch for two species, Northeast Arctic cod and saithe. In doing so we are able to recover estimates of stock elasticity but also estimates of catchability coefficients for different age classes and importantly an implicit index of fishing effort. Data on observed catch and a measure of biomass-at-age are available from the International Council for the Exploration of the Sea. The generated stock data are problematic and instrumental variables and bootstrapping are used in estimation. Time-series techniques applied to panel data are used to statistically motivate the estimation, which is carried out within a two-way panel framework. Report Arctic cod Arctic Northeast Arctic cod NHH Brage Open institutional repository (Norwegian School of Economics) Arctic |
institution |
Open Polar |
collection |
NHH Brage Open institutional repository (Norwegian School of Economics) |
op_collection_id |
ftnorgehandelshs |
language |
English |
topic |
stock elasticity fishing effort age class catchability coefficients VDP::Social science: 200::Economics: 210::Economics: 212 |
spellingShingle |
stock elasticity fishing effort age class catchability coefficients VDP::Social science: 200::Economics: 210::Economics: 212 Ekerhovd, Nils-Arne Gordon, Daniel V. Catch, stock elasticity and an implicit index of fishing effort |
topic_facet |
stock elasticity fishing effort age class catchability coefficients VDP::Social science: 200::Economics: 210::Economics: 212 |
description |
Economists are interested in the relationship between fishing effort and stock size, and how these impacts catch levels. The interest lies in the stock elasticity where it is thought that for pelagic fish species it is close to zero and for demersal fish stocks closer to one. We statistically model and estimate the relationship between stock size and catch for two species, Northeast Arctic cod and saithe. In doing so we are able to recover estimates of stock elasticity but also estimates of catchability coefficients for different age classes and importantly an implicit index of fishing effort. Data on observed catch and a measure of biomass-at-age are available from the International Council for the Exploration of the Sea. The generated stock data are problematic and instrumental variables and bootstrapping are used in estimation. Time-series techniques applied to panel data are used to statistically motivate the estimation, which is carried out within a two-way panel framework. |
format |
Report |
author |
Ekerhovd, Nils-Arne Gordon, Daniel V. |
author_facet |
Ekerhovd, Nils-Arne Gordon, Daniel V. |
author_sort |
Ekerhovd, Nils-Arne |
title |
Catch, stock elasticity and an implicit index of fishing effort |
title_short |
Catch, stock elasticity and an implicit index of fishing effort |
title_full |
Catch, stock elasticity and an implicit index of fishing effort |
title_fullStr |
Catch, stock elasticity and an implicit index of fishing effort |
title_full_unstemmed |
Catch, stock elasticity and an implicit index of fishing effort |
title_sort |
catch, stock elasticity and an implicit index of fishing effort |
publisher |
SNF |
publishDate |
2013 |
url |
http://hdl.handle.net/11250/166688 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic cod Arctic Northeast Arctic cod |
genre_facet |
Arctic cod Arctic Northeast Arctic cod |
op_relation |
Working paper;25/13 http://hdl.handle.net/11250/166688 |
_version_ |
1766304294041026560 |