About the Cross-Gender Friending Ratio
The map shows the Cross-Gender Friending Ratio (CGFR): the share of female friends among male Facebook users divided by the share of female friends among female Facebook users in the same location.
A value of 1 means men and women form equal shares of their friendship ties with women. Lower values indicate more gender-segregated friendship networks. The slider switches the measure across top-friend cutoffs.
More details, including the full data download, are available at the Humanitarian Data Exchange.
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Social Capital Lab