This paper reviews the literature on discrete choice experiments (DCEs) in health economics, focusing on studies published between 2009 and 2012. The review aims to assess whether trends observed in earlier periods (1990-2008) continued and to identify new developments. Key findings include: 1. **Number of Studies**: The average number of DCE studies per year increased from 3 in 1990-2000 to 14 in 2001-2008, and further to 45 in 2009-2012, with a peak of 74 in 2012. 2. **Country of Origin**: The UK's dominance in DCE studies has declined, with an increased proportion of studies originating from the USA, Canada, Denmark, the Netherlands, and Germany. There is also a growing trend towards DCEs in high-, middle-, and low-income countries. 3. **Number of Attributes**: The proportion of studies with four or five attributes rose from 29% in 1990-2000 to 44% in 2001-2008, but fell to 32% in 2009-2012. Studies with seven to nine attributes increased from 12% in 1990-2000 to 22% in 2009-2012. 4. **Domain of Attributes**: The proportion of studies with time-related attributes fluctuated, while the proportion with risk-related attributes increased from 35% in 1990-2000 to 57% in 2009-2012. Studies with healthcare-related attributes also increased from 82% in 1990-2000 to 72% in 2009-2012. 5. **Number of Choice Tasks**: The proportion of studies with eight or fewer choices decreased from 38% in 1990-2000 to 22% in 2009-2012. Studies with 9-16 choices increased from 53% in 1990-2000 to 62% in 2009-2012. 6. **Survey Administration**: There was a trend towards computerized administration, with the proportion of studies using self-completed questionnaires decreasing from 79% in 1990-2000 to 48% in 2009-2012. 7. **Design Plan**: The proportion of studies using full factorial designs decreased from 12% in 1990-2000 toThis paper reviews the literature on discrete choice experiments (DCEs) in health economics, focusing on studies published between 2009 and 2012. The review aims to assess whether trends observed in earlier periods (1990-2008) continued and to identify new developments. Key findings include: 1. **Number of Studies**: The average number of DCE studies per year increased from 3 in 1990-2000 to 14 in 2001-2008, and further to 45 in 2009-2012, with a peak of 74 in 2012. 2. **Country of Origin**: The UK's dominance in DCE studies has declined, with an increased proportion of studies originating from the USA, Canada, Denmark, the Netherlands, and Germany. There is also a growing trend towards DCEs in high-, middle-, and low-income countries. 3. **Number of Attributes**: The proportion of studies with four or five attributes rose from 29% in 1990-2000 to 44% in 2001-2008, but fell to 32% in 2009-2012. Studies with seven to nine attributes increased from 12% in 1990-2000 to 22% in 2009-2012. 4. **Domain of Attributes**: The proportion of studies with time-related attributes fluctuated, while the proportion with risk-related attributes increased from 35% in 1990-2000 to 57% in 2009-2012. Studies with healthcare-related attributes also increased from 82% in 1990-2000 to 72% in 2009-2012. 5. **Number of Choice Tasks**: The proportion of studies with eight or fewer choices decreased from 38% in 1990-2000 to 22% in 2009-2012. Studies with 9-16 choices increased from 53% in 1990-2000 to 62% in 2009-2012. 6. **Survey Administration**: There was a trend towards computerized administration, with the proportion of studies using self-completed questionnaires decreasing from 79% in 1990-2000 to 48% in 2009-2012. 7. **Design Plan**: The proportion of studies using full factorial designs decreased from 12% in 1990-2000 to