It allowed them to control for factors such as students' hometowns and racial backgrounds.
The researchers then control for factors such as GDP and distance, isolating free-trade deals as a variable.
Last year, the state comptroller's office released a study analyzing districts' spending compared with their academic performance, attempting to control for factors like demographics, size and regional costs.
Scientists try to control for factors that could affect the risk, like smoking and race, it's hard to be sure what is causing what in the Beaver Dam study.
And because the data tracked financial choices over time, they could also control for factors like age, which matters because the composition of people's portfolios is likely to change as they grow older.In this section Stumble or fall?
The researchers acknowledged that they did not recruit as many subjects as they originally hoped for, nor could they control for factors like whether poorer, smaller mothers died in the war, or how surviving mothers treated their children.
The results, Mr. Bates said, showed that "abuse predicts aggressiveness even after you control for factors such as social class, family disruption and exposure to spousal violence". He said the study showed that youngsters who had been abused were more apt to respond to all provocative social situations aggressively.
On Thursday a new report by the university regulator suggested that if you control for factors such as the grades of young people going to university, social class and the universities they are attending, a slightly smaller proportion of young people would be getting firsts and 2 1s today compared with in 2011 – if nothing else (such as quality of teaching) was changing.
It does allow us to control for factors that vary between countries and between certification programs.
A comparison site (or group of sites) is used in order to control for factors other than the road modification.
Indeed, once we control for factors like education and profession, there is no significant difference in the prosocial behavior of public and private sector employees.
