However, the disadvantage of fixed age-limits is the all or nothing character, meaning that relevant differences between individuals are not taken into account.
The EESR is by necessity more simplistic than the SDR due to fixed age limits of working and retired populations in the former measure, the latter being flexible with respect to the age of retirement (UN ECE 1999, p. 46).
This is in contrast to other definitions which use a fixed age, for example, age 65; use of a fixed age is problematic over long periods of time.
We discuss advantages and drawbacks of standardized competence assessment in children on a case-by-case basis compared to application of a fixed age limit, and conclude that a selective implementation of case-by-case competence assessment in specific populations is preferable.
Early intervention studies are carried out on mice of a fixed age, without predetermining whether or not they have advanced tumours.
Advantages and drawbacks of standardized competence assessment in children on a case-by-case basis compared to application of a fixed age limit based on empirical evidence need further discussion (see also submitted manuscript, December 2014, IH, PT, GM, MdV, JvG, RJL).
(In the Netherlands, there are really interesting debates about whether the state should move from a fixed age of retirement to a fixed period of paid retirement, so that the retirement age would be index-linked to average life expectancy).
Instead of having a fixed age at which people can get Social Security and Medicare, we should link the age of eligibility to lifetime wealth.
Some authors have proposed that children's assent should only be required from a fixed age of 14 years, based on theories of subject autonomy and child development [ 24].
Inclusion of actual age at response had no effect on the estimated growth models so models shown have a fixed age of response at each time point.
Nine-year risk of developing T2DM and ten-year risk of CVD mortality were estimated using the ARIC and SCORE formulae, respectively, based on measurements at baseline and 24 months while applying a fixed age of 60 years at both time points.
