A DOSE-RESPONSE FUNCTION FOR THE IMPACT OF O3 ON ONTARIO-GROWN WHITE BEAN AND AN ESTIMATE OF ECONOMIC LOSS

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Abstract
A function for ozone (O3) dose and yield response in white bean (Phaseolus vulgaris L.) was developed using data from antioxidant trials (EDU) over a 4-yr period. The best-fitting dose-response function was obtained only when weather factors were included. Mean reduction in yield associated with variable O3 dose over a 4-yr period was 13%. Assuming adaptive expectations, the stock adjustment model most accurately estimated the supply curve for white bean. Factors used in estimating white bean supply included hectares planted, price, yield and insurance premiums. Based on the effect of yield reductions on producer surplus, the short-run loss due to O3 in real average income is approximately 15% and the long-run loss is approximately 12% of real average income.Key words: Bean (white), ozone, ethylene diurea, dose-response function, economic loss

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