紧急求助！Johansen协整检验结果说明什么和OLS结果又有什么关系啊-经管之家官网！

我是菜鸟。。。在这里跪谢帮助我的各位大侠了。。。协整关系上课没有学过，现在自学协整写论文好痛苦
（1）首先弱弱的问一下，协整是什么意思，存在协整关系说明什么？说明涉及的变量之间存在因果关系，放在一个方程中是合理的吗？
（2）请问一下Johansen结果如下，反应出至少有2个协整方程吗？这两个方程怎么看？
（3）可不可以说Johansen表明变量之间存在协整关系，之后OLS回归结果呢？Johansen协整方程结果和OLS结果有什么关系吗？ 不会用Johansen怕万一断章取义了还不如OLS呢，狂谢大家啊！！！
Date: 05/18/10 Time: 20:44
Sample (adjusted): 4 22
Included observations: 19 after adjustments
Trend assumption: No deterministic trend (restricted constant)
Series: LNXT LNRE LNFDI LNY
Lags interval (in first differences): 1 to 2

Unrestricted Cointegration Rank Test (Trace)

HypothesizedTrace 0.05
No. of CE(s) Eigenvalue Statistic Critical Value Prob.**

None *0.994429174.782854.079040.0000
At most 1 *0.88035876.1683035.192750.0000
At most 2 *0.76978035.8266020.261840.0002
At most 30.3409067.9209029.1645460.0856

Trace test indicates 3 cointegrating eqn(s) at the 0.05 level
* denotes rejection of the hypothesis at the 0.05 level
**MacKinnon-Haug-Michelis (1999) p-values

Unrestricted Cointegration Rank Test (Maximum Eigenvalue)

HypothesizedMax-Eigen 0.05
No. of CE(s) Eigenvalue Statistic Critical Value Prob.**

None *0.99442998.6144628.588080.0000
At most 1 *0.88035840.3417022.299620.0001
At most 2 *0.76978027.9057015.892100.0004
At most 30.3409067.9209029.1645460.0856

Max-eigenvalue test indicates 3 cointegrating eqn(s) at the 0.05 level
* denotes rejection of the hypothesis at the 0.05 level
**MacKinnon-Haug-Michelis (1999) p-values

Unrestricted Cointegrating Coefficients (normalized by b'*S11*b=I):

LNXT LNRE LNFDI LNY C
8.4158344.1119610.328543 -37.73695419.3692
-5.66964820.34523 -6.12741033.43795 -398.4380
-11.6328510.73170 -3.58768047.02955 -532.3603
-12.924640.9747670.62510355.39249 -623.0672


Unrestricted Adjustment Coefficients (alpha):

D(LNXT)0.047236 -0.0306320.0915380.017714
D(LNRE) -0.035348 -0.0192350.011384 -0.012513
D(LNFDI) -0.0615580.0540820.026066 -0.088639
D(LNY)0.005963 -0.0077140.0005220.000411


1 Cointegrating Equation(s): Log likelihood168.9145

Normalized cointegrating coefficients (standard error in parentheses)
LNXT LNRE LNFDI LNY C
1.0000000.4885980.039039 -4.48404249.83098
(0.07005)(0.01744)(0.03953)(0.43234)

Adjustment coefficients (standard error in parentheses)
D(LNXT)0.397534
(0.30208)
D(LNRE) -0.297480
(0.08644)
D(LNFDI) -0.518061
(0.43951)
D(LNY)0.050188
(0.02205)


2 Cointegrating Equation(s): Log likelihood189.0853

Normalized cointegrating coefficients (standard error in parentheses)
LNXT LNRE LNFDI LNY C
1.0000000.0000000.163877 -4.65345852.28109
(0.01345)(0.04907)(0.52747)
0.0000001.000000 -0.2555040.346739 -5.014573
(0.01961)(0.07152)(0.76872)

Adjustment coefficients (standard error in parentheses)
D(LNXT)0.571207 -0.428982
(0.35072)(0.71740)
D(LNRE) -0.188424 -0.536689
(0.08398)(0.17178)
D(LNFDI) -0.8246860.847184
(0.50072)(1.02422)
D(LNY)0.093924 -0.132423
(0.00970)(0.01984)


3 Cointegrating Equation(s): Log likelihood203.0382

Normalized cointegrating coefficients (standard error in parentheses)
LNXT LNRE LNFDI LNY C
1.0000000.0000000.000000 -2.98103132.25239
(0.23213)(2.69800)
0.0000001.0000000.000000 -2.26076826.21248
(0.36149)(4.20146)
0.0000000.0000001.000000 -10.20535122.2176
(1.47332)(17.1239)

Adjustment coefficients (standard error in parentheses)
D(LNXT) -0.4936400.553376 -0.125194
(0.29152)(0.44128)(0.13424)
D(LNRE) -0.320854 -0.4145180.065405
(0.11504)(0.17413)(0.05297)
D(LNFDI) -1.1279031.126912 -0.445121
(0.75101)(1.13681)(0.34581)
D(LNY)0.087856 -0.1268260.047355
(0.01453)(0.02200)(0.00669)