Why did the proportion of women working in clerical jobs increase during the progressive era?

The role of women reformers who were hired by the government agencies and ... For instance the number of “female clerical workers, for example, increased ... advancement of the age induced many more job opportunities during the era

The role of women reformers who were hired by the government agencies and  advancement of the age induced many more job opportunities during the Progressive Era.

d: social contract theory

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.