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Movies that tend to be converted or tend to be 3D in a late decision are not effective.

"Producer Joel Silver Exclusive Interview: Discusses UNKNOWN, LOGAN’S RUN, Berlin, VOD, Home Video Sales, 3D, and a Lot More". Interview with Steve 'Frosty' Weintraub, collider.com. February 17, 2011.
Movies that tend to be converted or tend to be 3D in a late decision are not effective.