Benefactor,
Though I feel slightly uncomfortable going into great detail about my background on a public forum, I can tell you that my quantitative, verbal and analytic GRE scores were all above the 90th percentile, my undergrad GPA was 4.0, and I have 3 years of full time public service work experience and 3 years of study/research/work abroad relevant to my field of interest. However, I also have some perceived weaknesses, including an unrelated primary undergraduate major and a lack of economics/statistics classes. I tried to mitigate these weaknesses by focusing on my high quantitative GRE and strong performance in calculus classes. So far that strategy seems to be working for me. Good luck to you!