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Submitted on: 30 January 1998.
Revised on: 10 March 1998.
Accepted on: 22 March 1998.
Policy Insights from the Behavioral and Brain Sciences
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Submitted on: 13 May 1999.
Revised on: 06 June 1999.
Accepted on: 01 July 1999.
Policy Insights from the Behavioral and Brain Sciences
Submitted on: 26 November 2010.
Revised on: 04 December 2010.
Accepted on: 20 December 2010.
Policy Insights from the Behavioral and Brain Sciences
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Submitted on: 24 August 2011.
Revised on: 01 September 2011.
Accepted on: 13 September 2011.
Policy Insights from the Behavioral and Brain Sciences