While the film is somewhat critical of Mr. Koch, Mr. Barsky said, the former mayor was a fan.

WSJ: On Day He Died, a New Film

The director of the documentary, Neil Barsky, said it's "sad and unfortunate" that Mr. Koch wasn't alive for opening day.

WSJ: On Day He Died, a New Film

Research by two American economists, Bradford DeLong and Robert Barsky, looked at very long run stockmarket performance in America, from 1900-1990.

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"We are starting to believe that what you think has a powerful influence on symptoms, " says Harvard psychiatrist Arthur Barsky, who has tested CBT.

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Also, Adam Barsky theorizes that focusing on goals actually distorts our perception of what is unethical behavior so that we are less likely to consider the ethical implications of our actions.

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"He used to call me, " Mr. Barsky remembered.

WSJ: On Day He Died, a New Film