Ecologic Institute with support from the Heinrich Boell Foundation compiled a study to provide factual background to the debate on regulatory cooperation under TTIP. The study contains an overview of existing models for achieving regulatory harmonisation, with a focus on mechanisms already used between the US and EU, in trade agreements with third countries, at the multilateral level with US and EU involvement, and some particularly far-reaching examples of regulatory cooperation. The study also  features brief overview of regulatory processes within the US, the EU and Germany in order to clarify which affairs are normally decided in a parliamentary law and which are delegated to other entities like agencies or ministries.