Thesis defences

PhD Oral Exam - Fadi Harb, Economics

Essays on International Environmental Agreements

Tuesday, January 24, 2023
11:30 a.m. – 1:30 p.m.

This event is free


School of Graduate Studies


Daniela Ferrer


Guy-De Maisonneuve Building
1550 De Maisonneuve W.
Room 930.48



When studying for a doctoral degree (PhD), candidates submit a thesis that provides a critical review of the current state of knowledge of the thesis subject as well as the student’s own contributions to the subject. The distinguishing criterion of doctoral graduate research is a significant and original contribution to knowledge.

Once accepted, the candidate presents the thesis orally. This oral exam is open to the public.


The following dissertation consists of three essays that tackle topics in Environmental Economics. It focuses on the formation of International Environmental Agreements (IEAs) in three respective essays: (i) the first essay “IEAs - Contingency Plans for all Coalition Sizes” uses the Stackelberg assumption to build a contingency plan for a remaining coalition when faced with a potential exit by one or more of its members. Homogeneous agents and quadratic benefit and environmental damage functional forms are used to compute contingency plans for all coalition sizes in order to immunize a coalition against single or multiple unilateral deviations, (ii) the second essay “IEAs - Contingency Plans under Foresight” studies the series of strategies taken by a coalition of any size when members are foresighted, in that a member considers the possibility that once it acts, another member might react. It presents the strategies taken by different coalition sizes for subsequent unilateral deviations, and (iii) the third essay “IEAs - Choice of Net Emissions” adds abatement choice as a separate variable. Given that countries have two choice variables, the framework examines agreements on net emissions, in which countries commit to either emissions or abatement and choose the other variable independently in a subsequent stage of the game. Using numerical simulations, results suggest that cooperation on net emissions is possible even with a high degree of heterogeneity among two countries. Comparing results to the pure Nash non-cooperative benchmark case, cooperation on net emissions show that the model achieves lower aggregate net emissions and allow gains from cooperation to both countries.

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