I'm at Liverpool University <a href=" http://www.world-television.com/buy-fosamax-online.pdf ">buy alendronate online</a> The first paper, Yellen's most-cited, builds a model in which the amount of effort that a worker puts into their job depends on the difference between the wage they're getting paid and what they perceive as a "fair wage." The bigger the discrepancy, the less hard they work. This model explains how efficiency wages could be worthwhile for employers but, unlike most economic models, builds heavily on social psychology and sociology for its foundations, citing a number of psychological experiments, theoretical sociological papers, and even the Bible (particularly the story of Joseph, he of the amazing technicolor dreamcoat) for inspiration. Daniel Kahneman, the eminent psychologist who won a Nobel in economics the year after Akerlof, is thanked for his help in putting the paper together. Interestingly, Akerlof and Yellen write, "In the existing literature this model most closely resembles [Larry] Summers'."