Abstract
The article examines theoretical approaches toevaluating online citizen engagement within thesystem of public governance. Based on a systematic review of academic publications, the fragmentationof existing evaluation models of digital participation is identified. Key groups of indicators characterizingtechnical, organizational, and societal dimensions of efficiency are determined. It is established that thereduction of transaction costs in digital interaction creates conditions for improving administrativeperformance and generating public value. Amultidimensional conceptual model integratingtechnological, institutional, and socio-economic parameters of online citizen engagement evaluation isdeveloped. The proposed structure enables digital participation mechanisms to be interpreted asinstruments for enhancing the economic and institutional efficiency of the public sector and may serve asa basis for further operationalization of indicators and empirical verification.