That "teacher salaries and class size, measured in terms of pupil/teacher ratio, are the only two contributing factors, of the 63 different components studied, that have demonstrable impact on education outcomes".
Some were convinced that EBM had demonstrable impact on ensuring safe patient care.
Moreover, other such approaches have not had demonstrable impacts on male health outcomes [ 32].
"Six months later, we have found no evidence that Google's policy has had a demonstrable impact on demoting sites with large amounts of piracy," the report said.
Brazilian ethanol, unlike its incredibly inefficient North American competitor, has had no demonstrable impact on the recent increase in food prices, as the relative stability of world sugar prices shows.
They also confirm that Britain's position outside the euro zone has, as yet, had no demonstrable impact on its ability to attract inward investors.In 1999, Britain overtook America to climb to the top of the league table for outward foreign direct investment (FDI) made by firms, according to the UN's "World Investment Report".
According to Thompson, "If some wacked-out adult wants to spend his time playing Grand Theft Auto: Vice City, one has to wonder why he doesn't get a life, but when it comes to kids, it has a demonstrable impact on their behavior and the development of the frontal lobes of their brain".
Our primary aims were to i) pilot a modified impact assessment process and ii) determine what proportion of intervention projects had any demonstrable impact on subsequent policy or practice in 'real world' settings after the research undertaken had concluded and to group these projects according to the magnitude their impacts.
