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Measuring species concentration, diversification and dependency in a macro-fishery

Author

Listed:
  • Ikerne Valle

    (University of the Basque Country)

  • Kepa Astorkiza

    (University of the Basque Country)

  • Ignacio Díaz-Emparanza

    (University of the Basque Country)

Abstract

This paper studies the triad “concentration, diversification and dominance” in an ecosystem $$(\Omega _{t})$$ ( Ω t ) defined as the macro-fishery comprised by the entire commercial fish species landed in a specific geographical area and time horizon (1986:1–2011:12). This is faced computing alternative monthly concentration indices (CIs) based on the income shares of individual species and, afterwards, analysing the structural features and overall dynamics of the monthly time series related to each of the CIs. Special attention will be paid on categorising not only the long-term cycles, but also the seasonal components found in the series.

Suggested Citation

  • Ikerne Valle & Kepa Astorkiza & Ignacio Díaz-Emparanza, 2017. "Measuring species concentration, diversification and dependency in a macro-fishery," Empirical Economics, Springer, vol. 52(4), pages 1689-1713, June.
    • Handle: RePEc:spr:empeco:v:52:y:2017:i:4:d:10.1007_s00181-016-1102-8
    DOI: 10.1007/s00181-016-1102-8
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    More about this item

    Keywords

    Macro-fishery; Concentration index; Time series; Deterministic–stochastic trend; Deterministic–stochastic seasonality; Seasonal unit roots;
    All these keywords.

    JEL classification:

    • Q22 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - Fishery
    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes

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