Bryan Caplan, Professor of Economics at George Mason University, challenges the belief that college students are more valuable due to technological advancements. He discusses the puzzle of low graduation rates despite increasing returns to graduating. Caplan explores the misinterpretation of graduation rates and the role of choice of major in determining earnings. He questions the necessity of spending years in college to prove one's worth as a worker and discusses the influence of government subsidies on education. Caplan argues against increasing subsidies, as the return on education is not high for marginal students.

John Cochrane of the University of Chicago talks to EconTalk host Russ Roberts about the experience of teaching a massive open online course (MOOC)--a class delivered over the internet available to anyone around the world. Cochrane contrasts the mechanics of preparing the class, his perception of the advantages and disadvantages of a MOOC relative to a standard in-person classroom, and the potential for MOOCs to disrupt traditional education.

John Christy of the University of Alabama in Huntsville and Kerry Emanuel of the Massachusetts Institute of Technology talk with EconTalk host Russ Roberts about climate change. Topics discussed include what we know and don't know about global warming, trends in extreme weather such as hurricanes, rising sea level, the likely change in temperature in the next hundred years. Both scientists also give their perspective on what policies might be put in place to reduce risk from climate change. This episode was recorded before a live audience at the College of Business Administration at the University of Alabama in Huntsville.

Jeffrey Sachs of Columbia University and the Millennium Villages Project talks with EconTalk host about poverty in Africa and the efforts of the Millennium Villages Project to fight hunger, disease, and illiteracy. The project tries to achieve the Millennium Development Goals in a set of poor African villages using an integrated strategy fighting hunger, poverty, and disease. In this lively conversation, Sachs argues that this approach has achieved great success so far and responds to criticisms from development economists and Nina Munk in her recent EconTalk interview.

Richard Epstein, of New York University and Stanford University's Hoover Institution, talks with EconTalk host Russ Roberts about the differences between classical liberalism and hard-line libertarianism. What is the proper role of the state? Topics discussed include the Constitution, prudent regulation, contract enforcement, intellectual property, and the Supreme Court case, Lochner vs. NY.

Moises Velasquez-Manoff, author of An Epidemic of Absence, talks with EconTalk host Russ Roberts about his book--a discussion of why allergies and autoimmune diseases have been on the rise in the developed world for the last half-century. Velasquez-Manoff explores a recent hypothesis in the epidemiological literature theorizing the increase is a response to the overly hygienic environment in rich countries and the absence of various microbes and parasites. Velasquez-Manoff also considers whether reintroducing parasites into our bodies can have therapeutic effects, a possibility currently under examination through FDA trials. The conversation continues a theme of EconTalk--the challenge of understanding causation in a complex world.

Robert Frank of Cornell University talks with EconTalk host Russ Roberts about the implications of Ronald Coase's views on externalities. Drawing on his book, The Darwin Economy, Frank explores the implications of Coase's perspective for assessing public policy challenges where one person's actions affect others. Examples discussed include pollution, cigarette smoking and related issues.

Charles Calomiris of Columbia University and Stephen Haber of Stanford University, co-authors of Fragile by Design: The Political Origins of Banking Crises and Scarce Credit, talk with EconTalk host Russ Roberts about their book. The conversation focuses on how politics and economics interact to give some countries such as Canada a remarkably stable financial system while others such as the United States have a much less stable system. The two authors discuss the political forces that explain the persistence of seemingly bad financial regulation. The conversation includes a discussion of the financial crisis of 2008.

Paul Sabin of Yale University and author of The Bet talks with EconTalk host Russ Roberts about his book. Sabin uses the bet between Paul Ehrlich and Julian Simon--a bet over whether natural resources are getting scarcer as population grows--as a lens for examining the evolution of the environmental movement and its status today. Sabin considers the successes and failures of the movement and the challenges of having nuanced public policy discussions on issues where both sides have passionate opinions.

Erik Brynjolfsson of MIT and co-author of The Second Machine Age talks with EconTalk host Russ Roberts about the ideas in the book, co-authored with Andrew McAfee. He argues we are entering a new age of economic activity dominated by smart machines and computers. Neither dystopian or utopian, Brynjolfsson sees this new age as one of possibility and challenge. He is optimistic that with the right choices and policy responses, the future will have much to celebrate.