我拿了2001-2018年的数据进行分析，发现L的值是负数，应该是多重共线性的影响，请问大家有什么办法解决？

  Dependent Variable: LNG

Method: Least Squares

Date: 03/05/20   Time: 15:56

Sample: 2001 2018

Included observations: 18

Variable

Coefficient

Std. Error

t-Statistic

Prob.  

C

108.5412

76.44069

1.419941

0.1761

LNK

0.910604

0.147631

6.168100

0.0000

LNL

-9.514675

6.963508

-1.366362

0.1920

R-squared

0.995920

    Mean dependent var

12.76319

Adjusted R-squared

0.995376

    S.D. dependent var

0.695832

S.E. of regression

0.047318

    Akaike info criterion

-3.112850

Sum squared resid

0.033585

    Schwarz criterion

-2.964455

Log likelihood

31.01565

    Hannan-Quinn criter.

-3.092388

F-statistic

1830.645

    Durbin-Watson stat

1.203295

Prob(F-statistic)

0.000000