How to aggregate data in SPSS (Data Aggregation)
In this video, I show how data aggregation is done in SPSS. Data aggregation is used when there is a need to change the unit of analysis from, let's say, individual level to firm level. Or, in science research, one phenomenon may require multiple observations per subject and thus aggregation may be needed. However, before aggregating the data, we might first want to check inter-rater reliability and inter-rater agreement. For more on this please refer to James (1984) and James (1993).
PS: Sorry about a few squeaks!