Can somebody tell me the way to identify high paying keywords which can yield a good adsense revenue? Is keyword country a good option which claims to offer high paying adsense keywords for fee? is there any other good option too??
I guess it depends on many factors. Could you specify your specific purpose that what you mean for country kw?
A common sense way to check that, is to "search" for industry with high price per transaction. Industries like Real Estate and Insurance might be the example. It's pretty hard to monetize though.