The phrase "a decrease in occupations" is correct and usable in written English.
It can be used when discussing trends or changes in the job market or employment statistics.
Example: "The recent economic downturn has led to a decrease in occupations available for recent graduates."
Alternatives: "a reduction in jobs" or "a decline in employment opportunities."
This is not observed for females (indeed the point estimate corroborates a decrease in occupations of routine content).
We then explored whether polarization arises as a result of a decrease in occupations which are intensive in routine contents.
In the United States, polarization has been driven by a growth in abstract tasks—usually at the upper part of the wage distribution, and low-skilled services usually at the lower end of the wage distribution, coupled with a decrease in occupations with a high degree of routine tasks which lie around the middle of the wage distribution.
In this regard, we found that the observed polarization is indeed consistent with a decrease in occupations intensive in routine content and an increase in those intensive in non-routine services which are found both at the low and high end of the wage distribution.
Indeed, Autor et al. (2003) and Goos et al. (2009) relate the abovementioned polarization process to a decrease in the demand for occupations performing routine job contents or tasks that workers in the middle-wage occupations perform and which can be easily mechanized.
Greater social mobility has resulted from changes in the occupational structure, typified by an increase in the relative number of white-collar and professional occupations, with a decrease in the less-skilled and manual occupations.
Among males, for workers under 30 years old, we find a decrease in the share of occupations with more routine tasks which turns into increases in those with more abstract content and particularly with more non-routine service content.
Within each study sample, between the two periods there was an increase in construction-related jobs and a decrease in timber cutting and related occupations.> -wrap-foot> *Numbers of jobs with exposure to wood dust.
Similarly, for African-Americans in "Hispanic occupations", a 1 percentage point increase in the density of Hispanic immigrants in those occupations corresponds to a decrease in wages for African-Americans of 2.9%%.
There is also a decrease in average age of females in abstract occupations in the expansionary period, but this is reversed in the recession.
Here, a 1 percentage point increase in the density of African-Americans in an occupation corresponds to a decrease in wages of 9.5%%.
