Rajiv Sethi is a Professor of Economics at Barnard College, Columbia University and an External Professor at the Santa Fe Institute. He was a 2020-21 Joy Foundation Fellow at the Harvard Radcliffe ...

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For more than 250 years, Columbia has been a leader in higher education in the nation and around the world. At the core of ...

The University offers an outstanding and comprehensive array of academic programs. These include three undergraduate schools, ...

Visit our Data & Figures, Earth Institute and CSAS.org Websites. Sign up for my occasional Communications here. Recent Communications August 27, 2025: Sophie's Planet, Chapter 10 (draft). The Venus ...

2003 M.S. in Computer Science, University of Wisconsin-Madison 2000 M.S. in Probability and Statistics, Univ of Science and Technology of China 1997 B.S. in Electrical Engineering and Information ...

Our aim is to help people understand global climate change and how the factors that drive climate are changing. We start with climate diagnostics people are usually most interested in climate change ...

Teaching Fall 2005, E3106: Introduction to OR: Stochastic Models Spring 2006, E4709: Data Analysis for Financial Engineers Spring 2006, E4723: Credit Risk Models and Derivatives ...

as a Financial Economist in August 2017.

In French, when speaking in the past tense, one must constantly choose between the imparfait and the passé composé (cf. part I). In this exercise we will focus on cases where both tenses are used in a ...

During the Middle Ages there were all kinds of crazy ideas, such as that a piece of of rhinoceros horn would increase potency. Then a method was discovered for separating the ideas--which was to try ...

The primary effect of the Aral Sea desiccation has been the significant loss of water in the sea. The water level has dropped approximately 23 meters since the onset of its primary sources of water ...