Sea bass angling in ireland: a structural equation model of catch and effort
Grilli, Gianluca Curtis, John Hynes, Stephen O’Reilly, Paul
Grilli, Gianluca
Curtis, John
Hynes, Stephen
O’Reilly, Paul
Identifiers
http://hdl.handle.net/10379/11734
https://doi.org/10.13025/29059
https://doi.org/10.13025/29059
Repository DOI
Publication Date
2018-07-01
Type
Article
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Citation
Grilli, Gianluca; Curtis, John; Hynes, Stephen; O’Reilly, Paul (2018). Sea bass angling in ireland: a structural equation model of catch and effort. Ecological Economics 149 , 285-293
Abstract
The relationship between angling effort and catch is well-recognised, in particular that effort influences catch rates. But increased catch, which can be considered an attribute of fishery quality, may influence effort in terms of number of fishing trips. This suggests bi-directional feedback between catch and effort. In many travel cost applications little attention has been given to this endogeneity problem. In this paper we expand the application of structural equation models to address this issue by jointly estimating demand (effort) and catch functions. Using a cross-section dataset of sea bass anglers we propose two separate joint models. First, we include expected catch as an explanatory variable in the demand equation. In the second, we reverse the causality and use the expected number of fishing days as a covariate in the catch function. The two approaches produce similar model estimates, and perform better at predicting anglers' catch and effort than standard models. The findings confirm that sea bass angling is highly valued, with a consumer surplus of about (sic)282-318 per angler per day, though this is likely to be biased upwards. Furthermore higher catches result in more days fished, on average in a 2:1 ratio. Whereas on average, an additional fishing day results in 3-4 additional bass caught.
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Publisher
Elsevier BV
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Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland