The Gibson Guitar Company debuted its first Les Paul model in 1952, which later became the instrument of choice for rock musicians such as Eric Clapton and Led Zeppelin's Jimmy Page.

VOA: standard.2009.08.14

What we did--the core theoretical framework that we had-- was the mean variance theory, which led us to the capital asset pricing model.

我们讲到了投资组合多元化的核心理论框架,即均值-方差模型,之后又讲到了资本资产定价模型

耶鲁公开课 - 金融市场课程节选