Magnolia Pictures has acquired North American rights to “Freakonomics” and will release the documentary theatrically in the fall.Pic, based on the bestseller by Steven Levitt and Stephen J. Dubner, was recently picked to close the Tribeca Film Festival. Gala preem for the movie is skedded for April 30. Like the 2005 book on which it’s based, “Freakonomics” looks at a series of case studies that mix the methods of economic study with pop culture and human behavior. Film version is helmed by a team of directors that includes Alex Gibney, Morgan Spurlock, Rachel Grady, Heidi Ewing, Eugene Jarecki and Seth Gordon. Magnolia will likely give the documentary a wide release, because of the high profile of the source material. Spurred by the success of the first book, a sequel, “SuperFreakonomics,” was published last year. The doc version of “Freakonomics” is produced by Chad Troutwine with Chris Romano and Dan O’Meara of the Green Film Co.