But it said some other types might be helpful in encouraging competition and lower rates.
To some experts, the new estimates suggest that the Bush administration's philosophical approach of encouraging private-market competition to hold down costs is working.
The Federal Government is also moving toward encouraging competition in the electric market.
The law was supposed to lower costs for the public by encouraging competition among contractors.
Mr. Clinton asserts that his proposal would control costs primarily by encouraging competition in the health care market.
So what's to be done about encouraging private competition to the near-monopoly now held by government?
An important way of encouraging vigorous competition in the brewing industry is to give regional brewers the chance to expand.
By the 1960's, however, major corporations realized they could save money by encouraging competition for their business.
A series of substantial enactments were needed to work out the process of encouraging competition in transportation.
"It saves the city money by encouraging competition," the Mayor said.