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On Testing for Speculative Bubbles

[Symposium: Bubbles]

By Robert P. Flood and Robert J. Hodrick

Journal of Economic Perspectives, Spring 1990

The possibility that movements in prices could be due to the self-fulfilling prophecies of market participants has long intrigued observers of free markets. This paper surveys the current state of the empirically-oriented literature concerning rational dy...

How Costly Is Protectionism?

By Robert C. Feenstra

Journal of Economic Perspectives, Summer 1992

How costly is protectionism? This paper begins from a U.S. perspective, examining the costs to both the U.S. and other countries from U.S. protectionism. It emphasizes that substantial costs are imposed on foreign countries by U.S. protectionism. These co...

Can Mobile Phones Improve Learning? Evidence from a Field Experiment in Niger

By Jenny C. Aker, Christopher Ksoll, and Travis J. Lybbert

American Economic Journal: Applied Economics, October 2012

The returns to educational investments hinge on whether such investments can improve the quality and persistence of educational gains. We report the results from a randomized evaluation of an adult education program in Niger, in which some students learne...