But in an interview, Professor Peterson stood by his characterization of the overall result as significant.

Professor Peterson said in the report that the gains by black students using vouchers were statistically significant in each city after two years.

This information was not included in the report, although Professor Peterson acknowledged it in the interview.

Professor Peterson dismissed the criticism, saying his work "was looked at by lots of people lots of times."

"Every time something is introduced that provides more choice, it is never taken away," Professor Peterson said.

Turning welfare over to the states to run as they choose could also set off what Professor Peterson called "the race to the bottom."

As Professor Peterson notes, taconite still accounts for about 40 percent of the region's economy.

Professor Peterson is trying to determine how matter might have organized into visible forms.

Without the vapor to interfere, data can thus be collected throughout the team's 10-week stay, Professor Peterson said.

The two pay him a visit, but James is recognised as the boy that was seen leaving the scene of Professor Peterson's murder.