Lang, Harald Public Economics, MPI for Tax Law and Public Finance, Max Planck Society;
http://www.tax.mpg.de/files/pdf2/2103-07-22_Interaktiv1.pdf (Any fulltext)
Lang, H. (2013). Fiscal Policy: Europe at a Crossroads. Newsletter of the Max Planck Institute for Tax Law and Public Finance, (1), 4-5.