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"""<">"@"B"P"R"""##8#>#N#R#T#z#γΣΣγΣγΏ|oh&h&OJQJ^J%jAh!/hXbEHOJQJU^J'jd&H h!/hXbOJQJUV^J jbh!/hXbOJQJ^Jh!/hXbH*OJQJ^Jh!/h!/OJQJ^Jh!/hXbOJQJ^J!jh!/hXbOJQJU^J%j>h!/hXbEHOJQJU^J%z#|#~########$$$$$"$$$J$L$N$P$~$$$$$ǺǺǺǺr_ǭQǺh!/hXbH*OJQJ^J%j>Ih!/hXbEHOJQJU^J'jDH h!/hXbOJQJUV^J%jHFh!/hXbEHOJQJU^J'jl&H h!/hXbOJQJUV^Jh!/h!/OJQJ^Jh!/hXbOJQJ^J!jh!/hXbOJQJU^J%jPCh!/hXbEHOJQJU^J'jf&H h!/hXbOJQJUV^J$$$$$$ %"%$%&%(%0%2%X%Z%\%^%`%%%%%%%Ǻǭǭǭr_ǭOAǭh!/hXbH*OJQJ^J jbh!/hXbOJQJ^J%jPh!/hXbEHOJQJU^J'jv&H h!/hXbOJQJUV^J%jMh!/hXbEHOJQJU^J'jx&H h!/hXbOJQJUV^Jh!/hXbOJQJ^Jh!/h!/OJQJ^J!jh!/hXbOJQJU^J%jtKh!/hXbEHOJQJU^J'js&H h!/hXbOJQJUV^J%%%%%&VV V`VnVpVVVVVVVWWW WWWWWWWXǺqccTh!/h!/@OJQJ^Jh!/h!/5OJQJ^Jhwhw5OJQJ^Jh!/hXb5OJQJ^J jbh!/hXbOJQJ^Jh!/hXbH*OJQJ^JUh!/h!/OJQJ^Jh!/hXbOJQJ^J!jh!/hXbOJQJU^J%jRh!/hXbEHOJQJU^J'j &H h!/hXbOJQJUV^J sau: trong iu kin cc nhn t khc khng i, khi Xj tng ln 1 n v (theo n v tnh ca Xj) th E(Y) s tng bnh qun (j%. 5. ngh)a ca h s hi qui tng ng vi bin gi trong m hnh Log-Tuyn tnh tng qut Xt m hnh hi qui log tuyn tnh nh sau:  EMBED Equation.3  (9) Vi Xj l cc bin lin tc c h s hi qui l (j v D l bin gi c h s hi qui l (, ui l cc sai s ngu nhin c k vng bng 0 phng sai hu hn. Theo Halvorsen v Palmquist (1980) v Kennedy (1981),  xc nh phn bin ng ca Y khi Di=1(g) c tnh l YD=1=(1+g)YD=0 Ly logaric hai v, chng ta c: Ln(YD=1) = Ln((1+g)YD=0). Nh vy, khi bin i thm s c: Ln(YD=1) - Ln(YD=0)=Ln(1+g) (10) Hn na, t m hnh (9), chng ta c: Ln(YD=1) - Ln(YD=0)=( (11) Kt hp (10) v (11), chng ta c g=Exp(()-1. Nh vy,  xc nh nh hng ca bin gi n bin ng ca bin ph thuc trong hm log tuyn tnh, cn tnh antilog ca h s hi qui ca bin gi  c c lng v tr cho 1. V d: c ti liu gi nh v tin lng, tui ngh v gii tnh nh trn bng sau: Tui ngh, gii tnh v tin lng ca cng nhn (s liu gi nh) Tin lng (Y)Tui ngh (TN)Gii tnh (D)251121.510262123212730243028.53025.14127513051286029.56133.5713170 Thc hin hi qui theo m hnh sau:  EQ \L(Ln(Yi)=(+(TNi+(Di+ui)  Kt qu hi qui bng cng c Regression trong Data Analysis ca chng trnh Microsoft Excel nh sau Regression StatisticsMultiple R0.845212R Square0.714384Adjusted R Square0.662454Standard Error0.07074Observations14 ANOVADfSSMSFSignificance FRegression20.137680.0688413.756630.001016Residual110.0550450.005004Total130.192725CoefficientsStd Errort StatP-valueIntercept3.0894130.04612966.973831.02E-15TN0.0487640.0093835.196770.000296D0.0190710.0382360.4987690.627765 Vi kt qu ny, chng ta gii thch ngh)a ca cc h s hi qui l: - Trong iu kin cc nhn t khc khng i, tui ngh tng 1 nm th tin lng tng 4,8%. -  gii thch h s ca bin gi trc tin cn tnh e0.019071=1.019 nh vy, trong iu kin cc nhn t khc khng i, th tin lng ca nam ln hn ca n 1,9%. Hin nay, trong phn tch kinh t, cc nh kinh t s dng rt nhiu m hnh khc nhau. Tnh a dng ca cc m hnh to nn ni dung phn tch phong ph nhng cing lm cho vic gii thch ngh)a ca cc m hnh tr nn kh khn hn. Bi vit ny cing ch trnh by cch tip cn ton hc trong vic gii thch ngh)a ca cc tham s trong mt s m hnh. Hy vng vi cch tip cn ny s l tng cho vic gii thch ngh)a cc m hnh hi qui khc. Ti liu tham kho: 1. S.Charles Maurice, Charles W.Smithson (1990), Kinh t qun l, Trung tm ti liu Thng tin HKT Quc dn, H Ni. 2. Jan Kmenta (1986), Elements of Econometrics, Second Edition, Macmillan, NewYork. 3. Guijarati (1988), Basic Econometrics, Mc Graw Hill Publishing, NewYork. 4. Maddala (1992), Introduction to Econometrics, Macmillan Publishing Company. 5. William H.Greene (1991), Econometric Analysis, Macmillan publishing company, NewYork. 6. Paul Newbold (1995), Statistics for Business& Economics, Fourth Edition, Prentice-Hall International, Inc.     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