Clerks are a POP type. They represent the skilled laborers at factories, as opposed to craftsmen who represent unskilled laborers. Clerks improve the efficiency of the factory they are employed at, and they increase the research points gained by a country by 0.5 per percent of clerks in the country, to a max of 2 research points.
The optimal percentage of clerks in a factory is 20%. At this level they will increase the amount of goods output by the factory by 50% without increasing the input costs. They are therefore essential to building a profitable industry. Clerks are paid more of the factory's profits than craftsmen, but less than capitalists.
Literacy of a POP must be at least 50% for them to promote to clerks.