As of last year, Lauro said, zombie walks had been documented in 20 countries. The largest gathering drew more than 4,000 participants at the New Jersey Zombie Walk in Asbury Park, N.J., in October 2010, according to Guinness World Records.
"We are more interested in the zombie at times when as a culture we feel disempowered," Lauro said. "And the facts are there that, when we are experiencing economic crises, the vast population is feeling disempowered. ... Either playing dead themselves ... or watching a show like 'Walking Dead' provides a great variety of outlets for people."
But, Lauro pointed out, the display of dissatisfaction isn't always a conscious expression of that feeling of frustration.
"If you were to ask the participants, I don't think that all of them are very cognizant of what they're saying when they put on the zombie makeup and participate," she said. "To me, it's such an obvious allegory. We feel like, in one way, we're dead."
Meg Kinnard can be reached at http://twitter.com/MegKinnardAP .