Using recently released nationally representative data and a new estimator for fractional probit panel models, this paper reconsiders the relationship between the fraction of exports in total sales and firm characteristics in West and East German manufacturing. Controlling for unobserved firm characteristics no impact of human capital and R&D intensity on export performance is found, while firm size is positively related to exporting in West Germany only.-- Exports ; firm characteristics ; fractional probit panel model ; Germany