Could these indicators be useful? As a guide, perhaps.

http://www4.carleton.ca/cifp/app/serve.php/1232.pdf

Maybe EU is the example of your answer as it is said in the preamble of the Lisbone Treaty (about the identity....)

If you are departing from a social constructivist angle I believe that you should first establish for your countries under research how they share ideas about what constitutes a credible international society. Then you could select a number of actors who are part of that society. The more sources representing these credbile actors concur on the recognition of the 'undesired' situation in your country under scrutiny, the more pressue from peers in international society is 'sent'. The receptino wd i think also depend on whther the domestic actors explicitly recognize these international society members as 'significant others' - so e.g. a populist driven government might be less recogizant of the legitimacy of the source, O am not sure whtethe this makes sense. Best wishes

If you have access via library or other source to 'Global Institutions and development' edited by Morten Bøås and Desmond McNeill (2004), a useful chapter to read is #14 (The power of ideas by James J Hentz). When policy ideas gain international currency (i.e. global legitimacy), many national governments start considering how they can incorporate these into the domestic political arena.

One example I've looked at was the idea of 'freedom of information' (related also to data protection issues) that came to the fore in OECD member nations during the early 1980's. As a result, many of these nations introduced legislation aimed at giving citizens better access to government information and the right to correct errors in own personal data recorded therein. This, of course, does not mean that access to information actually was free nor improved in next one or two decades but at least provided grounds for citizens to raise complaints, queries and agitation...!

There are quite a few 'good practice' reports/manuals in the OECD resource library that document ideas tried out in developing countries (as well as advanced economies) that have achieved international recognition and been spread as 'good' if not 'best 'practice. The bureaucrats in many countries reference this when introducing policy policy proposals to their government/ ministry.