Energy-Growth Nexus: A Systematic Review of Empirical Evidence and Policy Implications

Abstract

The relationships between energy consumption and economic growth have been extensively studied in the economic and energy literature, yet empirical findings remain inconclusive. This systematic review examines the existing theoretical and empirical research on the energy-growth nexus, analyzing studies from developed and developing economies. The review explores four primary hypotheses: the growth hypothesis (energy consumption drives economic expansion), the conservation hypothesis (economic growth influences energy demand), the feedback hypothesis (a bidirectional relationship), and the neutrality hypothesis (no causal relationship). Findings indicate that the energy-growth relationship varies across countries depending on factors such as income levels, energy mix, and methodological approaches. Developed economies tend to exhibit a shift toward energy efficiency and the conservation hypothesis, while developing economies largely support the growth hypothesis, highlighting their dependency on energy for industrialization. The increasing role of renewable energy in sustaining economic growth is also examined, with evidence suggesting that while renewable investments support long-term economic sustainability, short-term transition challenges exist. The review underscores the need for balanced energy policies, renewable energy investment, and technological innovations to ensure sustainable economic growth while minimizing environmental impact. Future research should focus on regional-specific dynamics, the role of institutional factors, and the implications of climate policies on the energy-growth relationship.