Submitted on: 24 January 2013.
Revised on: 27 February 2013.
Accepted on: 13 April 2013.
___________________International Journal of Applied Behavioral Economics
Submitted on: 28 December 2015.
Revised on: 03 March 2016.
Accepted on: 18 April 2016.
___________________International Journal of Applied Behavioral Economics
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Submitted on: 17 June 2016.
Revised on: 26 July 2016.
Accepted on: 05 September 2016.
___________________International Journal of Applied Behavioral Economics
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