Sentences with phrase «little empirical evidence showing»

Not exact matches

Huff Stevens concurs: «Quantitative studies have, until very recently, shown little evidence of fundamental changes in empirical job security.»

After spending four years sifting through hundreds of studies on teacher education, a national panel has concluded that there's little empirical evidence to show that many of the most common practices in the field produce effective teachers.

The trouble is that there remains little empirical evidence to support the idea, as we were surprised to find out when we talked to UC San Diego atmospheric physicist Veerabhadran Ramanathan about his research showing that another type of aerosol — black carbon — had a significant warming effect: