Figure 3

Cosine similarity distribution of authors’ interest between the first and last years of their careers measured using the second level of the classification scheme. (panel (A)) Cosine similarity distribution as a function of when they started their careers. (panel (B)) Cosine similarity distribution as a function of the duration of their careers. In both cases there is a clear tendency towards exploration. (panels (C)–(D)) relative change between the data and the null model, measured as the relative error between the two, as a function of the first year of publication (panel (C)) and the career duration (panel (D))