http://www.slac.stanford.edu/spires/topcites/2007/annual.shtml Each year we have been consulting the Spires topcite list to gauge the quality or importance of recent string research, as judged by the research community itself. By recent is meant the last five years, up to and including the year in question. This year only one recent string paper made the top 50 list. It was published in 2003 and was the one Kachru Kallosh Linde Trivedi---the famous KKLT paper introducing the Landscape of some 10500 vacua. In 2007, KKLT was cited 225 times. This is the last year that the KKLT paper will make it into the 5-year "recent" window: 2003-2007. Next year the window will be 2004-2008 and it will no longer count as recent, according to the system we've been using. The makeup of the Top Fifty has changed considerably over the years since, say, 2002. Just for comparison, i will call up the same list for 2002----where recent means published in 1998-2002 http://www.slac.stanford.edu/spires/topcites/2002/annual.shtml I see that in 2002, there were ten recent string papers that made the Top Fifty. The number of times each was cited in 2002 was, respectively: 464, 426, 390, 329, 293, 285, 243, 199, 167, 159. ========================= In case anyone is interested there is also a separate top 50 list where the competition is restricted to articles posted in ARXIV hep-th. http://www.slac.stanford.edu/spires/topcites/2007/eprints/to_hep-th_annual.shtml The top ten recent string papers on that list garnered the following numbers of cites in 2007: 226, 142, 99, 83, 69, 57, 48, 44, 42, 42.