00931pab a2200145 454500008004000000100002000040245008900060260000900149300001300158362001000171520053600181650001400717700002200731773003200753180718b2001   xxu||||| |||| 00| 0 eng d  aMiao-Sheng Chen  aDetermination of impurity level and emission standard under various market structure  c2001  ap.435-50  aApril  aThe hazardous substance contained in chemical products will be released into the environment as pollutants in various form after consumer's consumption, which usually involves with chemical reaction.  We construct a model by taking fuel as an example to determine the impurity (e.g. sulfur content) level and emission (e.g. SOx) standard as environmental regulation under various market structure.  The impact of the restriction on impurity level in fuel on production level, emission standard and welfare is examined. - Reproduced  aPollution  aChung-Chiang Chen  aIndian Journal of Economics