Kendall’s rank and partial rank correlation analysis

difference in difference

difference in difference (DD) method

Difference-in-difference

2th rank diffraction

absolute rank

academic rank

accident rank

adding- weight one- rank local- region method

additive rank functions

adjacent rank

analysis of rank correlation

anthracite coal rank

anthracite rank

assessment rank

Cadre Rank

calculus of non-integral rank

coal rank distrib ution

Coal Rank Distribution

coal rank structure