The determinants of virtue : modelling changes in the CSR ratings of Chinese firms / Shuangqi Wu (Nottingham University Business School), Simon Appleton (University of Nottingham Ningbo China and IZA), Lina Song (Nottingham University Business School and IZA), Jinmin Wang (Nottingham University Business School) ; IZA Institute of Labor Economics. Bonn, Germany : IZA Institute of Labor Economics, November 2017