However, large size can also be associated with barriers to SC
initiatives. For example, small towns might be ideal settings for pilot projects, as they can deal with shorter installation times when projects requiring investments in distributed infrastructures (e.g. street lighting, smart waste) are needed. As such, they can more
easily attract technology vendors who are willing to undertake the experimentation of new technologies, and who, in some cases, can even be willing to license the technology free of charge in the start-up phase of the initiative. Large cities often have a high demographic density, which can be another relevant variable in the assessment of SC trends
throughout the world. Large and dense cities ease the flow of knowledge and ideas by putting a greater number of people in contact, by facilitating social interactions (Glaeser & Gottlieb, 2006),
and by generating ideas and innovation.