Vietnam, 1971 Was he a threat to himself or the other marine pilots? Lieutenant Devon Carmichael was not sure how to answer the straightforward question. The experiment he had been involved in was months ago, with no apparent side effects. "Honestly, I don't think so." The commanding officer stepped forward. "No? Well, while you were sick, you ran a 108-degree fever. The doctor didn't force me to take you to the hospital because no one knew what the hell was wrong with you. Then I was told flat out to keep my nose out of your past." The captain sighed and moved toward the door. "Your fever was sure strange. By all counts, you should be dead, or brain damaged." With the knob in his hand, he turned to look at his young officer once more. "So no, huh? Okay, if you say so." He pulled the door open, turned, and leaned against it. "Oh, Dev, a couple other things I may not have mentioned before. You were seen on South Point Hill overlooking the beach and the defensive fighting positions yesterday by the military police, and in the hangar walking around your plane the day before that. And in both instances, you simply vanished! Now seeing as how I know you never left that bed for a single minute since we put you there three days ago, this poor old country boy has to stop and ask himself, 'Do you possibly have a twin?'" The senior officer raised an eyebrow at Devon's expression of shocked surprise. "Son, you just might want to ask yourself about that top secret stuff one more time. Because personally, I disagree with your answer." He stepped into the hall to let Devon rethink what it had meant to be part of the Carmichael Experiment.

This volume offers a comprehensive review of experimental methods in economics. Its 21 chapters cover theoretical and practical issues such as incentives, theory and policy development, data analysis, recruitment, software and laboratory organization. The Handbook includes separate parts on procedures, field experiments and neuroeconomics, and provides the first methodological overview of replication studies and a novel set-valued equilibrium concept. As a whole, the combination of basic methods and current developments will aid both beginners and advanced experimental economists.

This book began life as a set of notes that I developed for a course at the University of Washington entitled Introduction to Modern Algebra for Tea- ers. Originally conceived as a text for future secondary-school mathematics teachers, it has developed into a book that could serve well as a text in an - dergraduatecourseinabstractalgebraoracoursedesignedasanintroduction to higher mathematics. This book di?ers from many undergraduate algebra texts in fundamental ways; the reasons lie in the book’s origin and the goals I set for the course. The course is a two-quarter sequence required of students intending to f- ?ll the requirements of the teacher preparation option for our B.A. degree in mathematics, or of the teacher preparation minor. It is required as well of those intending to matriculate in our university’s Master’s in Teaching p- gram for secondary mathematics teachers. This is the principal course they take involving abstraction and proof, and they come to it with perhaps as little background as a year of calculus and a quarter of linear algebra. The mathematical ability of the students varies widely, as does their level of ma- ematical interest.