Abstract: Giffen goods which originated from the British economist Robert Giffens special understanding of Irish potato market rule, embodies in the positive relationship between commodity price and its sales volume.At present, the academic circle breaks through the above understanding of Giffen goods, some scholars use Giffen behavior to replace it.So far, the exploration on Giffen behavior never ceases in academic circle, the key lies in the lack of evidence of the existence in reality. Therefore, based on the perspective of generalized virtual economy, this paper explores the existence of Giffen behavior for the first time by surveying urban consumers behavior of family service employment of consumers in Beijing. It turns out that, when the extra work time ratio locates in 01~03, consumers will increase employment as the wages of family service workers rise, which verifies the existence of Giffen behavior. Furthermore, in order to avoid the“Giffen Trap”existing in industry of family service, this paper proposes some suggestions.

Key words: Giffen behavior , family service , generalized virtual economy , Heckman selection model

摘要： 吉芬商品源于英国经济学家罗伯特·吉芬对爱尔兰土豆市场规律的特殊认识，具体表现为商品的价格与其销量呈现正向关系。目前，学界突破了对上述吉芬商品的认识，一些学者用吉芬行为来替代之。迄今为止，学界对吉芬行为的探讨就未中断过，其关键在于缺少现实中存在性的证据。由此，本文基于广义虚拟经济的视角，以北京市消费者的家庭服务雇用行为为例，对吉芬行为存在性进行了探析。结果表明，当额外工作时间比率位于01~03之间时，消费者对家庭服务人员雇用时间会随雇用价格的上涨而增加，即存在着吉芬行为。最后，为了规避家庭服务业中存在的“吉芬陷阱”，本文提出相关政策建议。

关键词: 吉芬行为 , 家庭服务业 , 广义虚拟经济 , 赫克曼备择模型