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Regional economic impacts of a plant disease incursion using a general equilibrium approach

Wittwer, G., McKirdy, S.J. and Wilson, R. (2005) Regional economic impacts of a plant disease incursion using a general equilibrium approach. The Australian Journal of Agricultural and Resource Economics, 49 (1). pp. 75-89.

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The present study uses a dynamic multiregional computable general equilibrium (CGE) model to estimate the micro- and macroeconomic effects of a hypothetical disease or pest outbreak. Our example is a Karnal bunt incursion in wheat in Western Australia. The extent of the incursion, the impact of the disease or pest on plant yields, the response of buyers, the costs of eradication and the time path of the scenario contribute to outcomes at the industry, regional, state and national levels. We decompose the contribution of these individual direct effects to the overall impact of the incursion. This might provide some guidance regarding areas for priority in attempting to eradicate or minimise the impacts of a disease or pest. The study also introduces a theory of dynamic regional labour adjustment in which economic events may lead to both real wage differentials and worker migration between regions.

Item Type: Journal Article
Copyright: © Australian Agricultural and Resource Economics Society Inc. and Blackwell Publishing Ltd 2005.
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