On the Optimal Size and Composition of Customs Unions: An Evolutionary Approach.

Customs unions enable countries to freely access each other's markets, which is thought to increase intra-regional trade and economic growth. However, accession to a customs union also comes with the condition that all members need to consent to a common external trade policy. Especially if countries feature different economic structures, this may act as a force against the creation of large customs unions. In this paper, we propose a new mathematical approach to model the optimal size and composition of customs unions in the form of a bi-objective combinatorial non-linear problem. We also use a multi-objective evolutionary algorithm (NSGA-II) to search for the best (non-dominated) configurations using data on the trade flows and economic characteristics of 200 countries. Our algorithm identifies 445 different configurations that are strictly preferable, from a global perspective, to the real-world landscape of customs unions. However, many of these non-dominated configurations have the feature that they improve outcomes for the world as a whole, on average, but not for all individual countries. The best configurations tend to favour the creation of a few large customs unions and several smaller ones.

Regional cooperation is essential to combatting health emergencies in the Global South.

Since COVID-19 was first discovered, it exploded into a pandemic resulting in devastating effects on human lives and a global recession. While there have been discussions that COVID-19 will accelerate the 'end of globalization and multilateralism', we have already seen the high costs of non-cooperation in responding to the virus resulting in sub-optimal use of resources, rapid spread of the virus between countries, and, ultimately, significant loss of life. In spite of their favorable demographic structures and relatively young populations, countries in the Global South are still harshly affected in both epidemiological and economic terms. Nations must find innovative ways to address health concerns and regional bodies are possible mechanisms for facilitating international cooperation on health. We delineate how regional organizations can support how countries address health threats namely by serving as a bridge between the global and national policy levels; strengthening disease surveillance; mobilizing supply chains and facilitating trade; supporting the production and procurement of medicines and supplies; and coordinating policies and work with other actors. We finalize by arguing that mechanisms for regional cooperation must be strengthened themselves in order to effectively contribute to positive health outcomes within member states.

Regional and inter-regional economic rules and the enforcement of the right to health: The case of Colombia.

The regional policy level is often seen as a (potential) source of progressive policy-making in health (and in social policy more widely), complementing or substituting national policy levels, which are perceived as underperforming. While it can certainly be argued that there are important opportunities to adopt regional approaches to tackle border-crossing health issues, this article draws the attention to the fact that the linkage between (inter-)regional and national policy levels is not uni-directional. While in some instances the regional level may indeed take the lead in the promotion of (the right to) health, in other instances it may well be the other way round. This article focuses on the case of Colombia, where international economic rules have deeply permeated public policies in the health sector. On one hand, Colombia has been opening markets through the conclusion of regional integration arrangements (e.g. Andean Community and the Pacific Alliance) and the new generation of Free Trade Agreements. On the other hand, Colombia has been one of the most active emerging countries in promoting the right to health as a justiciable fundamental right, in line with the International Covenant on Economic, Social, and Cultural Rights of the United Nations mainly due to the judicial activism of the Colombian Constitutional Court with interesting implications for regional social governance. The article shows that national courts can play an important role in the protection of the right to health in a context of economic integration and the absence of regional balancing policies.