不少致力于对美国“地下黑经济”研究的经济学家普遍认为，在美国这样一个政府收入大量依靠税收的国家．“地下经济”规模日益增大，活动日趋猖项，既有经济上的原因，也有非经济的因素在起作用。其中最直接的原因是一些企业和个人不惜违反道德准则和社会惯例，而且以身试法往? Many economists devoting themselves to studying the underground black economy in the United States generally believe that in a country like the United States where government revenue relies heavily on taxes, The scale of “underground economy” is increasing day by day, and its activities are becoming increasingly rampant. Both economic and non-economic factors are at work. One of the most direct reason is that some businesses and individuals at the violation of moral norms and social practices, but also to defensive?