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2.2.5. Yeu t6'khoa h9c c6ng nght\L ........................................................ 22
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2.2.6 . Yeu
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2.2.6.1. Tang tntd'ng kinh te ................................................................ 23
2.2.6.2. Chinh tri, x1i h9i ...................................................................... 23
2.2.6.3. Xu hu'6ng toan cilu h6a kinh te ............................................... 24
2.3. Phan tich m6i tru'C1ng vi m6 ............................................................... 24
2.3.1. Yeu t6Iuan chuy~n hang h6a, hanh khach b~ng 6 to .................. 24
2.3.2. Yeu to siin phifm thay the............................................................. 25
2.4. Phan tich n