<p>American here. Among these schools, best bets for undergraduate education are Georgetown, UCL, and Durham, in my opinion. Among the schools you listed, UCL has by far the strongest international reputation, consistently ranking among the top universities in the world in the various world rankings:</p>
<p>THES World University Rankings: UCL #17, NYU #41, Boston University #54, Durham #80, Georgetown #174</p>
<p>QS World University Ranking: UCL #4, NYU #43, Boston University #64, Durham #92, Georgetown #183</p>
<p>AWRU Ranking of World Universities: UCL #21, NYU #27, Boston University #71, Durham #201-300, Georgetown # 301-400</p>
<p>But in rankings of British universities, Durham often comes out sightly ahead of UCL, with both appearing near the top of the rankings:</p>
<p>Guardian ranking of British universities: UCL #6, Durham #7 (after Cambridge, Oxford, LSE, St. Andrews, and Warwick)</p>
<p>The Sunday Times university league table: Durham #4, UCL #13</p>
<p>The Times university ranking: Durham #5, UCL #7</p>
<p>And in some of the fields you want to study, Durham might also come out slightly ahead of UCL. Here are the Guardian’s subject-specific rankings of British universities:</p>
<p>Politics: Durham #7, UCL #13
Economics: Durham #3, UCL #9</p>
<p>Obviously, there’s a disparity between the British university rankings and the world university rankings. That’s because they’re measuring different things. The world rankings are based largely on reputational surveys of global employers, research publications and citations, and percentages of international students and faculty. British university rankings are based largely on outcomes for students and student satisfaction surveys. All pretty murky stuff, some of it of questionable value, but I think it’s fair to say UCL has a stellar international reputation while Durham is somewhat less well-known outside the UK, but most observers would rank both among the top British universities after Oxbridge.</p>
<p>Georgetown fares poorly in the international rankings in part because it’s pretty strongly oriented toward undergraduate education and is not a research powerhouse. On the strength of its undergraduate programs, however, I would place it a distinct notch ahead of NYU and BU, and roughly on a par with UCL and Durham for one seeking an undergraduate degree.</p>