When American writer Mark Halliday (Cummings) begins a relationship with the very married Margot Wendice (Kelly) in London, he unknowingly sets off a chain of blackmail and murder.

ENGADGET: Hitchcock classics Dial M for Murder (3D) and Strangers on a Train come to Blu-ray October 9th

For the study, the researchers used two data sets from chain stores and interviewed managers of nine convenience store chains.

FORBES: Pay Employees More and They'll Steal Less