Previous sessionNext session Drug markets Insights zone 4 (I4) In programme Thursday, 24 October, 2019 - 15:00 to 16:30 View presentations Chair KorfDirk Bonger Institute of CriminologyThe Netherlands Keywords New psychoactive substancesPolicyMarketsMethodsCannabisMonitoringNew trends Presentations Plenary session Poster session Big debate Structured session Workshop Oral presentation session Short communication session Poster guided tour 15:10 Oral presentation Purity, adulteration and price of drugs bought on-line versus off-line in the Netherlands 15:10 to 15:25 Insights zone 4 (I4) Daan van der Gouwe 15:40 Oral presentation A descriptive analysis of the illicit supply of new psychoactive substances within and from China 15:40 to 15:55 Insights zone 4 (I4) Minqi Zhao 15:55 Oral presentation MDMA dosage in XTC tablets: size matters 15:55 to 16:10 Insights zone 4 (I4) Ruben Vrolijk 16:10 Oral presentation Understanding drug markets: results of the MARSTUP study 16:10 to 16:25 Insights zone 4 (I4) Frank Zobel