The seminar will focus very specifically on investigation techniques and strategies in merger proceedings. We will have a close look at best practices for preliminary phase 1 investigations. For more complex phase 2 investigations topics such as essential planning and investigation steps, questionnaires and market surveys, gathering of econometric data, conducting state of play meetings, market testing of remedy proposals and drafting of decisions will be addressed. Experienced practitioners from OECD countries will give presentations, sharing their experience. Throughout the seminar a hypothetical merger notification and investigation will be the guiding theme. The participants will be asked to work in breakout groups on a couple of merger specific tasks on all three days of the seminar and to present their results to the group or to take part in role plays. During the breakout sessions they will be supported in their work by the OECD experts.