Table 2: Johansen Co-integration results.

  Hypothesized No. of CE(s)   Eigenvalue   Trace Statistic   5% Critical Value   Prob.**
  Panel A. lnRGI-lnWTIOIL Johansen Co-integration results
  None*   0.445   29.202   18.398   0.001
  At most 1   0.020   0.972   3.841   0.324
  Panel B. lnRGI-lnDQOILJohansen Co-integration results
  None*   0.280   18.482   15.495   0.017
  At most 1   0.055   2.715   3.841   0.099
  Panel C. lnRGI-lnBJOILJohansen Co-integration results
  None*   0.313   24.249   20.262   0.013
  At most 1   0.132   6.634   9.165   0.147
  Panel D.lnRGI-lnQHDCOALJohansen Co-integration results
  None*   0.323   26.277   20.262   0.007
  At most 1   0.146   7.550   9.165   0.100