The calculated VRG and VRP statistics being here respectively of 4.38 and 3.67 and the associated
critical values at 5% and 10% of 1.64 and 1.28, we conclude in both cases in favour of cointegration for
our sample of four GCC countries. We then move to the recent bootstrap panel cointegration test by
Westerlund and Edgerton (2007) to assess the robustness of these results.