Since its five-year study was issued in February, the state has stepped up its response.

It began what was supposed to be a five-year study six years ago; the betting now is that the study will take at least seven.

The five-year study was already well into its second year when the criteria were changed.

The conclusions followed a five-year study of 1,000 children from 5 to 12 at eight places around the country.

The research company was paid $42.7 million for the five-year study.

Their five-year study began with a sophisticated statistical analysis to identify which companies have truly exceptional performance, 344 in all.

A five-year study, however, has shown that this hasn't caused a drop in test scores.

He has embarked with others on a five-year study reviewing current teacher training programs.

A five-year study of upward feedback: What managers do with their results matters.

The drug, designed to treat colonrectal cancer, extended the lives of patients in a five-year study.