Fig 2. Factors predicting the gender of the first author, showing the posterior mode estimates for the fixed effects in the binomial model.

The model contained: manuscript type (N: research paper = 1,916, reviews = 88, short notes = 243, special issue = 17; contrast level = research paper), year, continent of affiliation (N: Africa = 26, America = 795, Asia = 82, Europe = 1,208, Oceania = 153; contrast level = Europe), gender of the last author (N: male = 1,697, female = 567; contrast level = female), whether the first author is the corresponding author (N: first author is the corresponding author = 1,818, first author is not the corresponding author = 446; contrast level = first author is not the corresponding author), and the interaction between the gender of the last author and the continent of affiliation. An asterix (*) indicates posterior modes whose 95% credible intervals do not overlap zero, after FDR correction.