Both empirical and conceptual research papers (abstract/work-in-progress papers or full paper) can be submitted in the various sub-areas of Economics.

Economics
Sustainable Development   Microeconomic Issues
International Trade and Policy Monetary Economics
Islamic Economics Monetary and Fiscal Policies
Energy Economics Public Finance
Environmental Economics General Equilibrium Analysis
Economic Development Labour Economics
Macroeconomic Issues Digital Economics
Behavioral Economics  E-Commerce
All other economics topics