Research

Here is the list of my published papers, working papers, and ongoing research projects.

Any feedback is strongly welcome! If you have comments and suggestions about my research, please don't hesitate to send them to these email addresses:

• filipp.uschev@ulb.be

• ph.ushchev@gmail.com

Selected publications

• Campbell, A., P.  Ushchev, and Y. Zenou (2024). The Network Origins of Entry. Journal of Political Economy, Vol.132, No 11, 3867-3916. Slides

• Thisse, J., M. Turner, and P. Ushchev (2024). Foundations of Cities. Journal of Urban Economics 143, 103684. Slides

• Kokovin, S., A. Ozhegova, S. Sharapudinov, A. Tarasov, and P. Ushchev (2024).  A Theory of Monopolistic Competition with Horizontally Heterogeneous Consumers. American Economic Journal: Microeconomics, 16(2), 354-386. Slides

• Boucher, V., M. Rendall, P. Ushchev, and Y. Zenou (2024). Toward a General Theory of Peer Effects. Econometrica, Vol. 92, No 2, 543-565. Slides

• Matsuyama, K., and P. Ushchev (2022). Destabilizing Effects of Market Size in the Dynamics of Innovation.  Journal of Economic Theory, Vol. 200, 105415. Slides 

• Ushchev, P., and Y. Zenou (2020). Social Norms in Networks. Journal of Economic Theory, Vol. 185, 104969. Slides

• De Palma, A., Y. Papageourgiou, J.-F. Thisse, and P. Ushchev (2019). About the Origin of Cities. Journal of Urban Economics 111: 1-13. Slides

• Ushchev, P., and Y. Zenou (2018). Price competition in product variety networks. Games and Economic Behavior 110: P. 226-247, Slides

• Parenti, M., P. Ushchev, and J.-F. Thisse (2017). Toward a theory of monopolistic competition. Journal of Economic Theory 167, 86-115. Slides

• Ushchev, P., I. Sloev, and J.-F. Thisse (2015). Do we go shopping downtown or in the ’burbs? Journal of Urban Economics 85, 1-15. Slides

Chapters

• Thisse, J.-F., and P. Ushchev (2018). Monopolistic competition without apology. In: Handbook of Game Theory and Industrial Organization. Ed. by Luis Corchon and Marco Marini, Vol.1, P. 93-136. Slides

Completed working papers 

• Lagunoff R., and P. Ushchev (2025). From Demographic to Behavioral Dispersion. 

• Campbell, A., M. Leister, P. Ushchev, and Y. Zenou (2025). Competing Diffusions in a Social Network.
  R&R requested from: American Economic Journal: Microeconomics 

• Sandomirskiy, F., and P. Ushchev (2024). The Geometry of Consumer Preference Aggregation. arXiv preprint arXiv:2405.06108. Also available as: CEPR DP19100.

• Matsuyama, K., and P. Ushchev (2023). Love-for-variety. CEPR DP18184.

• Matsuyama, K., and P. Ushchev  (2023). Selection and Sorting of Heterogeneous Firms through Competitive Pressures. CEPR DP17092-2 Slides Submitted

• Matsuyama, K., and P. Ushchev (2020). Constant Pass-Through. CEPR DP15475 New version (Jan 2021)

• Matsuyama, K., and P. Ushchev (2020). When Does Procompetitive Entry Imply Excessive Entry? CEPR DP14991. New version (Jan 2021)
  Slides (prepared for NBER Summer Institute 2021)

• Behrens, K., S. Kichko, and P. Ushchev (2019). Intersectoral Linkages: Good Shocks, Bad Outcomes? CEPR DP13946. Slides R&R requested from: Journal of International Economics 

• Matsuyama, K., and P. Ushchev (2017). Beyond CES: Three Alternative Classes of Flexible Homothetic Demand Systems. Updated version of CEPR DP12210. Slides

• Kokovin, S., M. Parenti, J.-F. Thisse, and P. Ushchev (2017). On the Dilution of Market Power. CEPR DP12367. Slides

• Thisse J.-F., and P. Ushchev (2016). When Can a Demand System Be Described by a Multinomial Logit with Income Effect? HSE WP BRP 139/EC/2016. Slides

Work in progress

• Production Networks as Graphon Games (with E. Liu and A. Tsyvinski)

• Network Structure and Political Polarization (with A. Campbell, C.M. Leister, and Y. Zenou) Slides

• Narratives in Political Competition (with G. Kirchsteiger)

• Destabilizing Effect of Market Size on Dynamics of Innovation: Judd meets Kimball (with K. Matsuyama)

• Endogenous Social Networks (with V. Boucher, A. Houndetoungan, F. Iskhakov, and Y. Zenou)

• Spillovers and Conformity in Local Labor Markets (with M. Rendall and Y. Zenou)

• Geography and Interpersonal Inequality (with C. Gaigne, F. Moizeau, and J.-F. Thisse)

• The Microarythmetics of Macroelasticities (with M. Parenti)

• How Social Interactions Shape Market Demands (with J.-F. Thisse)

• Awareness and AIDS: A Political Economy Perspective (with G. Aldashev and J.M. Baland)

• Non-optimality of Monopolistic Competition with Nested CES (with K. Matsuyama)

• On Optimality of Monopolistic Competition (with K. Matsuyama)

• Location, Social Norms, and Recycling
  (with F. Iskhakov, E. Kyriakopoulou, and Y. Zenou)

•  A Bare-Bones Model of Urban Hierarchy: a Fourier-analysis-based Approach (with A. De Palma, Y. Papageorgiou, and J.-F. Thisse)

• Technology Adoption and Social Norms (with Y. Zenou)

Other publications in international peer-reviewed journals

• Behrens, K., S. Kichko, and P. Ushchev (2024). Epsilon-CES Preferences and International Trade. Review of International Economics (forthcoming).
  Previous version: Intersectoral Markup Divergence. CESifo Working Paper Series No. 6965. Slides

• Bucci, A., and P. Ushchev (2021). Specialization vs Competition: An Anatomy of Increasing Returns to Scale. Journal of Economic Geography, 21(3), 461-486 . Slides

• Ivanova, V., and P. Ushchev (2019). Product differentiation, competitive toughness, and intertemporal substitution. Scandinavian Journal of Economics, 121: P. 1244-1269. Slides

• Malykhin, N., and P. Ushchev (2018). How market interactions shape the city structure. Regional Science and Urban Economics 71, 122-136. Slides

• Ushchev, P. (2017). Multi-product firms in monopolistic competition: the role of scale-scope spillovers. Research in Economics 71, 675-689. Special issue in honor of 40 years of the Dixit-Stiglitz model

• Osharin A.,  J.-F. Thisse, P. Ushchev, and V. Verbus (2014). Monopolistic competition and income dispersion. Economics Letters 122,  348-352.

Publications in Russian (Russian titles are translated)

• Ushchev, P. (2019). Internal city structure formation, in: Urban studies: economy, development, and management of cities, ed. L. Limonov: 170-250. 

• Ushchev, P., Sloev, I., and J.-F. Thisse (2014). Competition between small shops and a large shopping center. Journal of the New Economic Association 23(3): 12-37.

• Molchanov, P., and P. Ushchev (2013). The impact of market size on multi-product firms' concentration in a monopolistic competition model. Mathematical Game Theory and Applications 5(3): 27-57.

• Zhelobodko, E., Kichko, S., and P. Ushchev (2013). Factor endowments and market integration in a two-factor monopolistic competition model. Spatial Economics 3: 10-29.