there are so much opportunist behavior which deviate from the target of public interests for lack of a pressure of competitive market and stimulation of interests.
由于缺乏竞争性市场的压力和收益激励,公共管理中存在诸多偏离公共利益目标的机会主义行为。
it concludes as follows: if the product specificity is strong, the commodity contract can effectively curb farmer's opportunist behavior and it is stable.