Impact Assessments are now made for all significant legislation and policies proposed by the European Commission. This book systematically explains: - why, when and how the Commission makes Impact Assessments - the underlying principles and quality criteria - who in the Commission is involved and at which stage - how stakeholders can be involved and get their issues across - the type of evidence that is valued by the Commission - the importance to stakeholders of engaging early with the Commission - what sort of engagement works best - and the mistakes stakeholders must definitely avoid This is a working tool for anyone with an interest in shaping EU legislation, including business organisations, regional and national governments, NGOs, citizen groups, law firms and public affairs professionals.