11.   Abuses grow, an underground economy flourishes, avoidance is common, evasion increases, investment is punished and savings penalized.

12.   But Erard said the income tax figures took into account the underground economy, where people deal in cash, while his estimate did not include unreported estates.

13.   But perhaps the underground economy is one market the United States would do well to cede to a foreign rival.

14.   Flower and food peddlers and other freelance entrepreneurs, many of them illegal immigrants, form an underground economy but it is not one that officials here track.

15.   He says it would be a fairer code, and would make inroads into taxing the underground economy.

16.   In this way, the underground economy provides a service to its own.

17.   It formed an underground musical economy.

18.   Kerry said the need for a consumption tax was growing with the underground economy.

19.   Many of the dollars used overseas circulate in underground economies and never see the inside of a bank, depriving officials of any chance to examine them.

20.   Millions of ordinary Russians have embraced the underground economy, convinced their taxes line the pockets of a powerful elite.