Research Article

Renewable Energy Consumption and Economic Growth in Nine OECD Countries: Bounds Test Approach and Causality Analysis

Table 1

ADF unit root test results.

CountryRenewable energy consumption
Real GDP per capita
Level termFirst differences Level term First differences

Denmark−0.108 ( ) −5.331 ( )−1.098 ( )
−1.331 ( )*
France −1.432 ( ) −6.509 ( )−0.132 ( )
−3.887 ( )
Germany−1.880 ( )
−8.009 ( )−2.145 ( )
−7.542 ( )
Italy −1.431 ( )
−3.114 ( )−1.221 ( )
−7.009 ( )
Japan−1.527 ( )
−4.772 ( )
−1.551 ( )
−5.760 ( )
Portugal−0.764 ( )
−0.321 ( )*−1.423 ( )
−1.654 ( )*
Spain−0.662 ( )
−4.092 ( )
−2.887 ( )
−3.061 ( )
UK−3.632 ( )
−5.521 ( )
−2.901 ( )
−4.321 ( )
USA−1.446 ( ) −4.144 ( )−2.112 ( )−4.433 ( )

Notes. First, all the regressions include an intercept and a linear trend in the levels and include an intercept in the first differences; second, numbers in parentheses are the optimal lag orders and selected based on Schwarz Bayesian; and finally represents the 10% significance level.