Postdoctoral Researcher
CREST (Télécom Paris, Institut Polytechnique
de Paris)
guiffard@telecom-paris.fr
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About
I am currently a postdoctoral researcher in economics at Télécom Paris, affiliated with the Centre de Recherche en Économie et Statistique (CREST) and the Institut Polytechnique de Paris. I am also an associate researcher at the UMR Développement et Sociétés, and I teach at École Polytechnique and the Institut d’Études du Développement de la Sorbonne (IEDES).
I hold a PhD in economics from Université Paris 1 Panthéon-Sorbonne. My research lies at the intersection of digital and development economics, with a focus on causal impact evaluation and geospatial data analysis. Beyond connectivity, my recent work explores the role of digital platforms and artificial intelligence in shaping labor market dynamics.
News
- 📢 I will join the LERN team as a associate professor in September 2025!
- 📢 On the job market 2024-2025!
- 📚 New Working paper: From Bytes to Business: Mobile Broadband, Firm Creations and Digital Divide in Tunisia (2025).
- 🎓 PhD defended in Sept. 2024 at Université Paris 1.
- 🏆 Winner of the TPRC 2024 Student Paper Award.
Research
📚 Publications
Guiffard J.-B. (2024). Valuing the Virtual: The Impact of Fiber to the Home on Property Prices in France. Telecommunications Policy, 48(4), 102732. doi: 10.1016/j.telpol.2024.102732.
Kergall, P. & Guiffard, J.-B. (2024). Impact of Broadband Internet on Preventive Healthcare Behaviours in Senegal. Economie et Statistique / Economics and Statistics, 542, 99–123. doi: 10.24187/ecostat.2024.542.2113.
📄 Working Papers
From Connection to Coordination: High-Speed Internet and Protests in Africa (2024)
Welfare Cost of Mobile Spectrum (Mis)allocation (2022) — with Marc Ivaldi, Julienne Liang and Louise Aïmène
From Bytes to Business: Mobile Broadband, Firm Creations and Digital Divide in Tunisia (2025) — with Mohamed Ali Marouani
📑 Ongoing Research
Digital platforms, high-speed Internet, and the transition from informal to formal employment in Brazil (2025) — with Joël Cariolle
Measuring AI Substitutability and Complementarity in Developing Countries’ Labor Markets: Evidence from Online Job Postings Data. (2025) — with Minh-Phuong Le
Experience & Education
💼 Experience
Postdoctoral Researcher – CREST (Télécom Paris)
Research on broadband infrastructure and platforms (ANR HYBRID).
Teaching Assistant (ATER Full-time) – Paris I Panthéon-Sorbonne University (IEDES)
Research Fellow – Orange, Regulatory Affairs
Worked on spectrum policy, competition in telecom markets, and regulatory impact assessments.
🎓 Education
PhD in Economics – Université Paris 1 Panthéon-Sorbonne
Dissertation: Essays in Digital Economics: Three Impact Evaluations of Broadband Internet
Master Degree in Economic expertise of development – Paris I - Panthéon-Sorbonne University
Focus on development economics, microeconometrics, impact evaluation.
Holder of secondary-school teaching diploma in Economic and Social Sciences
Double Degree - Caen University
Economics Degree and History Degree.
Contact
📧
guiffard@telecom-paris.fr
📍 Telecom-Paris, Departement SES, 19 place Marguerite Perey, 91120,
Palaiseau, France
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