Contact
Contact us
One address for everything
The fastest way to reach us is e-mail. Whether it is feedback on the indices, a data question, a correction or a legal matter, every message is read.
What helps us help you
If you are writing about a specific number, naming the index, the card and the date makes it much easier to check. Notes on unclear wording, missing segments and ideas for the roadmap are just as welcome. We usually reply within a few days.