Figure 6From: Gendered innovations: harnessing the creative power of sex and gender analysis to discover new ideas and develop new technologiesRatio of masculine to feminine pronouns in U.S. books, (1900-2008). Changes parallel increases in women's labor force participation, education, age at first marriage, etc. Data from American English corpus of the Google Books database ( Ì´1.2 million books). Reproduced from (Twenge et al. 2012).Back to article page