variable

Fixed effect estimates

First difference estimates

Estimate

Std. Error

Robust stdE

Pr (>|t|)

Estimate

Std. Error

Robust STD error

Pr (>|t|)

x4mwage

6.9629e−02

9.2500e−02

5.4195e−02

0.206257

0.04575837

0.08357681

0.04780257

0.344198

x4fuelW

3.9084e−04

4.2705e−03

1.2448e−03

0.755177

−0.00090186

0.00465068

0.00136366

0.512181

x4pcproT

−7.9061e−02

2.0287e−01

1.1174e−01

0.483319

0.05297004

0.21094800

0.11645392

0.651670

x4cproN

7.1133e−02

6.0755e−02

3.2984e−02

0.037105*

0.07505823

0.05034743

0.03181295

0.023276*

x4cproAN

3.1033e+00

8.6318e+00

5.7100e+00

0.589807

−0.62983081

6.86620396

5.17097862

0.903666

x4Ncprice

−1.0468e+01

1.2630e+01

7.4972e+00

0.170324

−5.32711092

13.48743525

9.12651419

0.562702

x4Rcfertq

−1.9763e−01

7.1914e−02

6.6301e−02

0.004874**

−0.25192327

0.07759634

0.07159199

0.001097**

x4NcfertC

8.5609e+00

9.0929e+00

4.1607e+00

0.046190*

12.37716474

8.53468251

3.62820844

0.001490**

x4Rcpestq

1.2216e−02

4.0104e−03

4.1740e−03

0.005625**

0.01497277

0.00426332

0.00440342

0.001538**

x4NcpestC

3.1811e+00

1.6441e+00

1.2326e+00

0.013636*

4.72821844

1.72263058

1.43368774

0.002051**

x4Rfertq_t

−8.9807e−01

5.1134e−01

4.5081e−01 &

0.053212.

−0.96146749

0.44427226

0.42087823

0.027728*

x4permCV

−1.7585e+00

6.5551e+00

4.8402e+00

0.718287

−4.57396888

6.95058234

5.90463680

0.443107

x4amand

−2.7234e+00

9.4071e+00

7.6238e+00

0.722802

−1.96224153

8.33402850

5.21645554

0.708783

x4pmproT

5.8174e−02

3.4482e−02

3.1848e−02

0.075230.

0.07492936

0.03034442

0.02705182

0.008463**

x4psproT

2.8921e−03

3.4261e−02

2.7338e−02

0.916277

−0.02490590

0.03888238

0.03427687

0.471696

x4prproT

3.8027e−02

8.9765e−02

6.6368e−02

0.569874

0.00091690

0.09143739

0.08990411

0.991914

x4pbeaproT

3.1465e−01

1.6630e−01

1.6075e−01

0.057307.

0.18003438

0.16931574

0.16765939

0.289343

x4ppeaproT

−9.1673e−02

2.1009e−01

1.7672e−01

0.606792

−0.05505650

0.20257389

0.18410084

0.766445

x4pyproT

2.0807e−02

5.9723e−03

9.3667e−03

0.032049*

0.02343749

0.00508494

0.00718131

0.002256**

x4pcasproT

1.0175e−02

9.7267e−03

8.0824e−03

0.215373

0.01242709

0.00882272

0.00664911

0.068959.

Signif. codes: 0 “***” 0.001 “**” 0.01 “*” 0.05 “.” 0.1 “” 1

Signif. codes: 0 “***” 0.001 “**” 0.01 “*” 0.05 “.” 0.1 “ ” 1

SST:

SSR:

R2:

Adj.R:

92,774,000

37,556,000

0.59519

0.2005

SST:

SSR:

R2:

Adj. R2:

181,460,000

59,367,000

0.68803

0.53984

F-statistic: 2.94057 on 20 and 40 DF, p-value: 0.001811

F-statistic: 4.32964 on 19 and 40 DF, p-value: 4.7286e−05