A.原始數(shù)據(jù) B.截面數(shù)據(jù) C.時間序列數(shù)據(jù) D.面板數(shù)據(jù)
A.橫截面數(shù)據(jù)B.時間序列數(shù)據(jù)C.面板數(shù)據(jù)D.原始數(shù)據(jù)