EN
The aim of the paper is to combine latent state-trait models (LS-T) and actor-partner interdependence models (APIM) in a multilevel context. In relationship and service marketing alike, situational context and the nature of buyer-seller interaction have a crucial impact on consumer satisfaction and loyalty (regarded as out variables). Additionally, customers and service providers are situated in a large institutional and hierarchical framework, which has an influence on the character and strength of multilevel adjustments.