Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 540564
Title A vertically linked dynamic partial equilibrium model to analyze market shocks caused by HPAI control in the Dutch egg production chain
Author(s) Longworth, N.; Jongeneel, R.A.; Saatkamp, H.W.
Source NJAS Wageningen Journal of Life Sciences 88 (2019). - ISSN 1573-5214 - p. 112 - 128.
Department(s) Business Economics
Agricultural Economics and Rural Policy
International Policy
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Egg production chain - HPAI control - Market effects - Partial equilibrium model - Supply and demand shocks

To analyze the market effects of HPAI control in the Dutch layer sector an integrated modelling approach was developed to simulate these effects. This approach included (1) an extensive epidemiological simulation, (2) farm level costs calculation and conversion, and (3) partial equilibrium (PE) modelling of the Dutch layer sector. Model structure and behavioural equations of the latter are described. The basis for the analysis of model behaviour were simulated HPAI epidemics which resulted in changes of stocks, i.e. shocks. These epidemics were simulated for different regions, control strategies and severity. Using the epidemiological input subsequently model behaviour was analyzed on the impacts of supply and demand shocks, trade bans and channeling restrictions. The results showed a remarkable impact of the pyramidal production chain structure on the market effects: culling of parent stock during the epidemic could result in an under-capacity of subsequent levels of the production chain with associated price effects. In some cases, restoring the starting situation could take 3 years. Moreover, different and sometimes conflicting market effects per chain level could be observed. Finally, the impact of demand shocks and the potential for channeling to industrial processing of eggs was observed. The results were discussed in view of conceptual validity and internal model verification, data validity and operational validity. It was concluded that this modelling approach provides a suitable basis for extensive analysis of market effects of HPAI epidemics.

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