Fiscal Union Without Factor Union: Optimal VAT under Monopolistic Competition
This paper studies optimal destination-based VAT in an open economy with monopolistic competition, endogenous entry, asymmetric fiscal needs and international transfers.
Economist · Research Fellow
Nicolas Djob Li Ngue Bikob
Research Fellow in Economics · CY Cergy Paris Université · THEMA (CNRS)
I study how taxation, market power and international integration shape resource allocation, firm location and income distribution.
Profile
Research at the intersection of public economics and international trade
I am an economist affiliated with CY Cergy Paris Université and THEMA. I received my PhD in Economics in 2025. My research examines the design of tax policy in integrated economies, with particular attention to destination- and origin-based commodity taxation, monopolistic competition, firm mobility, labour-market heterogeneity and welfare.
My current projects also study market power in overlapping-generations economies and the distributional effects of imperfect competition. I combine theoretical models, numerical methods and empirical calibration to derive policy-relevant results.
Affiliation
CY Cergy Paris Université · THEMA
Degree
PhD in Economics, 2025
Location
Cergy, France
Methods
Theory, calibration and numerical optimization
Selected work
Research
My work focuses on tax design, firm location, market power and distribution in open economies.
Commodity Tax Principles, Firm Location, and Skilled-Wage Incidence under the Destination and Origin Principles
A comparison of destination- and origin-based commodity taxation when firms are mobile and skilled wages respond endogenously. Submitted to International Tax and Public Finance in 2026.
Monopolistic Competition in OLG Models: Efficiency and Inequality
Joint with Pascal Belan. The project studies market power, capital accumulation and intergenerational and intragenerational redistribution.
Teaching
Clear economic reasoning, supported by formal tools
Undergraduate
Macroeconomics I and II
National accounting, short-run equilibrium, growth and macroeconomic policy.
First year
Microeconomics
Consumer choice, producer theory, market equilibrium and welfare.
Methods
Mathematics, probability and cost–benefit analysis
Quantitative foundations and applied policy evaluation.
Contact
Research, seminars and collaboration
For research discussions, seminar invitations or collaboration, please use my institutional email.