Key findings at a glance: · One additional solar PV installation located 100 metres away increases the probability that a neighbouring household will also install a solar PV system by around 2 percent. This effect is particularly pronounced when the household’s own roof is less suitable for a solar PV system. The researchers combined this information with data on the suitability of surrounding rooftops for solar PV systems. To identify causal effects, the researchers took advantage of the fact that rooftops differ in their suitability for solar PV systems across neighbourhoods. WortgruppenZusammenhängende Worte werden als Wortgruppe gesucht, wenn Sie sie in Anführungsstriche setzen, z.