Publications by topic and year
| Theme | 1996 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Business models | 2 | 1 | 1 | 5 | 2 | 1 | 7 | 2 | 10 | 8 | 10 | 13 | |||||||||||
| Drivers and barriers | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 11 | 4 | 16 | 12 | |||||||||
| Customer behavior | 1 | 1 | 1 | 8 | 4 | 3 | 7 | 9 | 9 | 5 | 14 | 20 | |||||||||||
| Vehicle balancing | 1 | 1 | 1 | 1 | 1 | 2 | 5 | 7 | 3 | 6 | 14 | 16 | 21 | ||||||||||
| Total | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 3 | 15 | 9 | 11 | 21 | 17 | 36 | 31 | 56 | 66 |
| Theme | 1996 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Business models | 2 | 1 | 1 | 5 | 2 | 1 | 7 | 2 | 10 | 8 | 10 | 13 | |||||||||||
| Drivers and barriers | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 11 | 4 | 16 | 12 | |||||||||
| Customer behavior | 1 | 1 | 1 | 8 | 4 | 3 | 7 | 9 | 9 | 5 | 14 | 20 | |||||||||||
| Vehicle balancing | 1 | 1 | 1 | 1 | 1 | 2 | 5 | 7 | 3 | 6 | 14 | 16 | 21 | ||||||||||
| Total | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 3 | 15 | 9 | 11 | 21 | 17 | 36 | 31 | 56 | 66 |