Part 1: State of the 'reverse' market
The writer is professor of finance emeritus at the Wharton School of the University of Pennsylvania. Comments and questions can be left at www.mtgprofessor.com.
What's your opinion? Leave your comments below or send a letter to the editor. To contact the writer, click the byline at the top of the story.
What's Your Home Worth?
App tracks business miles, expenses