Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Papers on factor forecasting are often focused on national data only. This paper highlights the role of international data for forecasting German GDP and shows how targeted predictors as proposed by Bai and Ng [Forecasting economic time series using targeted predictors, Journal of Econometrics 146 (2008), 304-317] can improve forecast accuracy.