Monetary and Statistics Department, Czech National Bank, Prague, Czech Republic
Institute of Economic Studies, Charles University, Prague, Czech Republic
Institute of Information Theory and Automation, Prague, Czech Republic
Copyright © 2014 Alexis Derviz, Jakub Seidler et al. This is
an open access article distributed under the Creative Commons Attribution
License, which permits unrestricted use, distribution, and reproduction in any
medium, provided the original work is properly cited.