Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We report new evidence that factor premia have strong dynamic effects on a range of sentiment measures, while the reverse effect is weak and only contemporaneous. Our analysis takes explicit account of endogeneity of sentiment measures to factor premia, and adopts statistical inference robust to non-normality and heteroscedasticity, which are largely neglected in the previous studies.