In addition to reallocation issues, if place-based policies positively/negatively affect neighboring areas, the estimation results based on comparisons between treatment groups and neighboring areas as a control group have estimation bias.
Statistics were based on comparisons between experimental groups (exposure to fan) and control groups (no fan).
It's also a bit difficult to draw conclusions based on comparisons between people and ferrets.
Researchers said all the conclusions in the new study were based on comparisons between people in similar jobs, working similar hours, with similar qualifications.
The W.T.O. said the duties were improperly based on comparisons between what Canadian provinces charge companies to cut timber on government-owned land and the cost of timber in neighboring states in the United States.
Recently reported replicated GWA observations identify a number of genes based on comparisons between controls and European-American and African-American polysubstance abusers.
Empirical research comparing online and offline consumer behavior has traditionally been based on comparisons between different sets of consumers, and therefore has been unable to isolate the effect of the Internet on consumer behavior from consumer-specific effects.
Several slopes of light shelf along with other design parameters were tested on March 21 at 10 00AM using serial testing improvement approach, based on comparisons between pretest and posttest results.
These points have been included in a proposed methodology for certification of adhesive bonded structures and repairs that is based on comparisons between the potential load capacity for the adhesive and the structural load requirements for the design.
These findings are based on comparisons between siblings that limit variation to short-lived shocks and controls for unobserved differences between mothers that could bias estimates.
Within each study group, the differences in the pre-treatment and post-treatment root lengths were analysed using Student's t test, based on comparisons between the means.
