Before revision: Using data on bribes paid from 2,100 truck trips between Ghana and Burkina Faso, Foltz and Opoku-Agyemang can observe the differences in interactions with truck drivers between the treated and the control group before the salary reform ( 2006-2010 ) and after the salary reform ( 2010-2012 ).
After revision: Using data on bribes paid from 2,100 truck trips between Ghana and Burkina Faso, Foltz and Opoku-Agyemang can observe the differences in interactions with truck drivers between the treated and the control group before the salary reform ( 2006–2010 ) and after the salary reform ( 2010–2012 ).