Changes in version 1.0.0                        

  - Initial CRAN release.
  - Main function xtdhcoint() for Durbin-Hausman panel cointegration
    tests.
  - DHg (group-mean) and DHp (panel) test statistics.
  - Automatic factor number selection via information criteria (IC, PC,
    AIC, BIC).
  - Long-run variance estimation using Bartlett kernel.
  - Cross-sectional dependence handled through common factor extraction.
  - Example dataset fisher_panel for testing Fisher effect.