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Tropospheric Ozone and Winter Wheat Production in England and Wales: A Note
Author(s) -
Shankar Bhavani,
Neeliah Harris
Publication year - 2005
Publication title -
journal of agricultural economics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.157
H-Index - 61
eISSN - 1477-9552
pISSN - 0021-857X
DOI - 10.1111/j.1477-9552.2005.tb00127.x
Subject(s) - tropospheric ozone , ozone , environmental science , endogeneity , yield (engineering) , winter wheat , estimation , pollutant , atmospheric sciences , production (economics) , meteorology , econometrics , mathematics , agronomy , geography , economics , chemistry , materials science , management , organic chemistry , macroeconomics , geology , metallurgy , biology
Tropospheric ozone is an air pollutant thought to reduce crop yields across Europe. Much experimental scientific work has been completed or is currently underway to quantify yield effects at ambient ozone levels. In this research, we seek to directly evaluate whether such effects are observed at the farm level. This is done by intersecting a farm level panel dataset for winter wheat farms in England & Wales with information on ambient ozone, and estimating a production function with ozone as a fixed input. Panel data methods, Generalised Method of Moments (GMM)techniques and nested exogeneity tests are employed in the estimation. The results confirm a small, but nevertheless statistically significant negative effect of ambient ozone levels on wheat yields.