Substitution in smartphone communication services

SMS use intensity changes in the age of ubiquitous mobile Internet access – A two-level investigation of residential mobile communications customers in Germany

“…However, he also concluded that the absolute magnitude of this correlation was so small that its ''practical relevance for MNOs is more than doubtful'' (Gerpott, 2010a, p. 441). Karikoski and Luukkainen (2011) and Karikoski and Soikkeli (2013) gathered objective usage data from a sample of 183 early adopters of a Nokia smartphone in Finland between 2008 and 2010. They found that SMS and MI services ''are used for different purposes .…”

Handset-Based Data Collection Process and Participant Attitudes

“…When compared to other similar research conducted in the area of smartphone measurements and reviewed in the related work chapter, this article extends the literature by providing also participant attitudes in addition to the process description itself. As a proof of concept, the handset-based data collected in the OtaSizzle project have already been utilized in studying social relations (Karikoski & Nelimarkka, 2011), substitution in smartphone communication services (Karikoski & Luukkainen, 2011) and diversity and context in smartphone usage sessions (Soikkeli et al, 2011).…”

“…The innovativeness of the participants together with the low number of participants makes the generalization of the results challenging, but as discussed before the usage patterns of these participants may reflect the situation that will take place this or next year among the majority of subscribers. Furthermore, these early adopter users are a salient user group when analyzing services that are not yet adopted by the average user (such as the mobile Internet communication services studied by Karikoski and Luukkainen (2011), for example). The participants are also naturally networked to some extent (as demonstrated by Karikoski and Nelimarkka, 2011) which enables studying social networks among the participants which would be a lot more difficult with a random sample.…”

National origin as a means of customer segmentation – an analysis of mobile communications users in a GCC country

“…In line with prior research (e.g. Gerpott 2015; Karikoski and Luukkainen, 2011;Verkasalo, 2007), we selected the monthly duration of outgoing mobile voice calls and averaged it over the 13 study months instead of taking the sheer mean of the number of monthly calls (Ghose and Han, 2011;Wei, 2008). This measurement is believed to more accurately capture the individuals' actual use intensity than the frequency of established outgoing connections.…”