张敢明、于国强在《中国改革报》著文认为 ,非法经济是相对于合法经济而言的。凡以盈利为目的但又未经法律认可的生产经营活动统称非法经济。包括地下经济和犯罪经济两大类———没有经过工商注册 ,也不在统计局和税务机关的账目上反映的生产经营活动可称为地下经济 ,如合法商 Zhang Daming and Yu Guoqiang hold the article in China Reform Newspaper saying that the illegal economy is relative to the legal economy. Where for the purpose of profit but not legally recognized production and operation collectively referred to the illegal economy. Including underground economy and criminal economy two categories --- not registered with the business, nor in the accounts of the Bureau of Statistics and the tax authorities reflect the production and business activities can be called the underground economy, such as legitimate business