OFFICIALS SAY MOB IS SHIFTING CRIMES TO NEW INDUSTRIES
Law enforcement officials say Mafia families in New York metropolitan area, with longtime control of extortion and bid-rigging rackets weakened by years of relentless prosecutions and regulatory crackdowns, are switching increasingly to white collar crimes as ripe sources of plunder; say new focus is primarily on multimillion-dollar frauds in health insurance, prepaid telephone cards and small Wall Street brokerage houses; say mobsters and associates, especially younger ones, have searched for new criminal opportunities in recent years as many of most powerful Mafia bosses have been sent to prison and flow of loot from traditional rackets has dwindled; photos (M)
