Goldin, Claudia - National Bureau of Economic Research - 1980
Of all the changes in the history of women's market work, few have been more impressive than the rapid emergence and … feminization of the clerical sector and the related decline in manufacturing employment for women. Although a century ago few women … were clerical workers, as early as 1920 22% of all employed non-farm women were, and about 50% of all clerical workers were …