Hello Tamta! The methodology depends on the research questions you set. What is your research focus? For instance, if you are interested in use of e-government platforms for collaboration of citizens and local authorities you may use network theory and collective action theory to reveal the mechanisms of interaction aimed to produce public good.
Evening, Aleksandr, so interesting suggestion, thank you. Research question is about how local E-government will be reflected on local public service development, like that.
Given the multi-disciplinary nature of the e-Government field, useful meta-theories are rare. The framework mentioned by Aleksandr above can assist you in analyzing what values are established in your studied context, and for who.