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Table 4 Linear and nonlinear ARDL models of unemployment effect of oil price change without structural break.

From: Investigating the relationship between changes in oil prices and unemployment rate in Nigeria: linear and nonlinear autoregressive distributed lag approaches

Variable

Real oil price (Brent)

Real oil price (WTI)

ARDL

NARDL

ARDL

NARDL

d(lunempl_1)

0.447***

0.442***

0.459***

0.433***

d(lropbtr)

0.078*

   

d(lropbtr_pos)

 

0.054

  

d(lropbtr_neg)

 

0.105*

  

d(lrwt)

  

0.065

 

d(lrwtin_pos)

   

0.080*

d(lrwtin_neg)

   

0.074

d(lrgdp)

0.014

− 0.168*

0.044

0.774

d(lcpi)

0.023**

− 0.198*

− 0.552***

− 0.622***

d(lrate)

0.007

0.007

0.009

0.008

d(fdi)

0.032**

0.036***

0.025***

0.038***

ect(-1)

− 0.051***

− 0.078***

− 0.056***

− 0.086***

c

− 5.613

66.873*

− 21.417

95.592**

lropbtr

− 0.126

   

lropbtr_pos

 

0.691*

  

lropbtr_neg

 

− 0.252

  

lrwti

  

− 0.365

 

lrwti_pos

   

0.939**

Lrwti_neg

   

− 0.319

lrgdp

0.272

− 2.139*

0.791

− 3.067**

lcpi

0.446**

− 0.160

0.254

− 0.278*

lrate

− 0.083*

− 0.058**

− 0.067*

− 0.056**

fdi

− 0.275*

− 0.180**

− 0.115

− 0.073

R-squared

0.9939

0.9941

0.9949

0.9952

Adjusted R-squared

0.9935

0.9936

0.9945

0.9947

F-statistic

2387.895

(0.0000)

2046.025

(0.0000)

193.579

(0.0000)

2113.660

(0.0000)

Durbin–Watson stat

1.998

1.947

1.949

1.889

ARDL bounds test

4.791***

4.622***

4.107**

4.805***

Diagnostic tests

Jarque–Bera

141.573

(0.0000)

135.167

(0.0000)

259.084

(0.0000)

287.498

(0.0000)

B-G serial corr. LM test

1.515

(0.2233)

0.299

(0.5853)

0.241

(0.6241)

1.175

0.2803)

Het. ARDL LM test

2.308

(0.1307)

2.617

(0.1078)

2.019

(0.1366)

1.487

(0.2296)

Ramsey RESET test

1.189

(0.2363)

0.427

(0.6699)

2.243

(0.0265)

0.661

(0.5095)

CUSUM test

Stable

Stable

Stable

Unstable

CUSUM Square test

Unstable

Unstable

Unstable

Unstable

  1. ***, ** and * denote the 1%, 5% and 10% levels of significance, respectively