In thirteen studies there was probably no (severe) selection bias because subjects were randomly selected [ 7, 21] or because all subjects in the population were included.
The Chateau St. Jean was a big rich wine for a 1999, apparently the result of severe selection.
For an owner who makes his living from his wine, though, a truly severe selection may be out of the question.
The formula is simple: small quantities of the best grapes; severe selection, which means cutting away excess bunches during the growing season and retaining only about half of the harvested grapes; new oak barrels every year; and hands-on care up to and including the bottling.
However, our IV results suggest that the OLS estimates are subject to severe selection bias from the fact that the choice of job search procedure is endogenous, associated with unobservable factors that affect the choice of informal versus formal procedures and that affect the earnings outcome.
This creates severe selection pressure and removes weak animals from the population.
The highly conserved miRNA may experience critical and severe selection during evolutionary fluctuation with multiple and complex gene expansion and frequent mutation, but important functional need ensured great selection advantage through the whole complex evolutionary history.
Severe selection led rapidly to a small cell size, more so than mild selection.
The decoupling would result in very severe selection pressure against the cue, causing rapid adaptation to other cues.
This may be one of the most severe selection processes designed by evolution, whose role is yet to be understood.
