How Should We Prevent the Next Financial Crisis?
Evidence That Calls-Based and Mobility Networks Are Isomorphic
Social relations involve both face-to-face interaction as well as telecommunications. We can observe the geography of phone calls and of the mobility of cell phones in space. These two phenomena can be described as networks of connections between different points in space. We use a dataset that includes billions of phone calls made in Colombia during a six-month period. We draw the two networks and find that the call-based network resembles a higher order aggregation of the mobility network and that both are isomorphic except for a higher spatial decay coefficient of the mobility network relative to the call-based network: when we discount distance effects on the call connections with the same decay observed for mobility connections, the two networks are virtually indistinguishable.
Explaining the Prevalence, Scaling and Variance of Urban Phenomena
The prevalence of many urban phenomena changes systematically with population size1. We propose a theory that unifies models of economic complexity2, 3 and cultural evolution4 to derive urban scaling. The theory accounts for the difference in scaling exponents and average prevalence across phenomena, as well as the difference in the variance within phenomena across cities of similar size. The central ideas are that a number of necessary complementary factors must be simultaneously present for a phenomenon to occur, and that the diversity of factors is logarithmically related to population size. The model reveals that phenomena that require more factors will be less prevalent, scale more superlinearly and show larger variance across cities of similar size. The theory applies to data on education, employment, innovation, disease and crime, and it entails the ability to predict the prevalence of a phenomenon across cities, given information about the prevalence in a single city.
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This paper is published in the journal, Nature: Human Behavior.
Last updated on 12/10/2021
The Low-Productivity Trap: Chiapas Growth Diagnostics
Chiapas is not only the lowest per capita entity in Mexico, but also the one that has grown the least during the last decade. As a result, the gap that separates it from the rest of the country has been widening significantly. This performance contrasts with the environment of relative macroeconomic and institutional stability that has prevailed during this period.
The low level of income in Chiapas is consistent with the inability of the state to produce things that it can sell beyond its limits. Its per capita exports are among the lowest in Mexico and are concentrated in a series of agricultural primary products, which are traded in highly competitive markets with very low margins.
What are the reasons behind Chiapas’ poor economic performance? This document follows the growth diagnosis methodology developed by Hausmann, Rodrik and Velasco (2005), adapting it to a sub-national context. Our objective remains the same: to identify the main constraints to economic growth in Chiapas.
According to the results of our analysis, the main restrictions on the growth of the state are not found in any of the usual suspects. Low levels of education to some extent are associated with the backwardness of Chiapas, but barely enough to explain a small part of the gap. The orography and the climate of Chiapas represent a challenge for the lifting and maintenance of its infrastructure, but the latter does not appear as the main restriction to the development of its productive fabric. There is also no evidence of credit market failures. The low levels of private credit in Chiapas are more associated with the low productivity of the economic activities carried out there than with bottlenecks or insufficiencies in the supply of financing.
Our conclusion is that Chiapas is in a (low) productivity trap. Its main problem is that it has an economy of very low complexity or sophistication, which reflects its few productive capacities. Modern production systems require a number of complementary inputs that are absent in Chiapas. In this context, productive diversity and private investment are low because returns to investment are also very low. Since the demand derived from private investment is low, it inhibits the emergence of a supply of complementary inputs, giving rise to a problem of coordination similar to that of the egg and the hen. Solving this coordination problem requires state intervention. Some of the few cases of manufactured exports that exist in Chiapas have resulted from successful state interventions to coordinate the existence of inputs needed for production with the demand for them. This feature provides the supporting argument that justifies the creation of Special Economic Zones.
In Chiapas, this situation is further aggravated by the combination of three factors: (1) high government transfers, (2) lack of public transportation and (3) low educational level.
Government transfers have effects similar to those identified in the economic literature of the Dutch disease: to increase the relative costs of tradable goods by tilting economic activity to the non-tradable sectors. The absence of a public transport system directly reduces the net benefit of working in the city if you live in the countryside. Thus, a dual equilibrium has been established with significant differences between wages across the entire range of professions and occupations between cities and their nearest rural communities. Finally, although Chiapas has gradually closed the educational gap that separates it from the rest of the country, there are still significant differences. In our opinion, This gap is due to the fact that the decision to accumulate years of schooling is partly endogenous to the returns obtained from education. Seen this way, education gaps would be a mirror of the differences in terms of production methods that predominate in Chiapas, in contrast to the rest of the country. For this reason, we observe that while returns to education are higher in Chiapas, it is more profitable for each educational level to emigrate (to a place where there are other complementary inputs that make higher productivity and a higher salary possible) than to stay in work the entity. Chiapas emigrants, although few, receive similar incomes to workers with the same level of education at the destination. Education gaps would be a mirror of the differences in terms of production methods that predominate in Chiapas, in contrast to the rest of the country. For this reason, we observe that while returns to education are higher in Chiapas, it is more profitable for each educational level to emigrate (to a place where there are other complementary inputs that make higher productivity and a higher salary possible) than to stay in work the entity. Chiapas emigrants, although few, receive similar incomes to workers with the same level of education at the destination. Education gaps would be a mirror of the differences in terms of production methods that predominate in Chiapas, in contrast to the rest of the country. For this reason, we observe that while returns to education are higher in Chiapas, it is more profitable for each educational level to emigrate (to a place where there are other complementary inputs that make higher productivity and a higher salary possible) than to stay in work the entity. Chiapas emigrants, although few, receive similar incomes to workers with the same level of education at the destination. For each educational level it is more profitable to emigrate (to a place where other complementary inputs exist that make possible a greater productivity and a higher salary) than to stay to work in the entity. Chiapas emigrants, although few, receive similar incomes to workers with the same level of education at the destination. For each educational level it is more profitable to emigrate (to a place where other complementary inputs exist that make possible a greater productivity and a higher salary) than to stay to work in the entity. Chiapas emigrants, although few, receive similar incomes to workers with the same level of education at the destination.
The policy implications of this diagnosis point to the need to take advantage of the knowledge that already exists in the greater populated centers of Chiapas and in the rest of Mexico to promote diversification towards other more complex activities that can build upon the capacities already Existing in the area. The creation of a public transport system linking the rural communities surrounding the city could solve the constraint of labor shortages, while opening up greater urban employment opportunities for the inhabitants of neighboring rural communities. This is a typical example of the egg and chicken dynamics that prevails in Chiapas, since a minimum scale of operation is required for the creation of an efficient public transport system,
Our prescription suggests that we take the mountain to Muhammad, since Muhammad has not gone to the mountain. That is to say, to try to solve the problems of coordination through an intervention that approaches the work opportunities to where the workers are, given that under the current conditions the latter do not find it profitable to get closer to where the job opportunities are. There are rural areas with low participation rates and high poverty rates in the neighborhood of San Cristóbal de las Casas. This is also a region where there is a lot of uncertainty for private economic activity, since the existence of ejido territories of community ownership predominates there. One implication of our analysis could be to create an Industrial Park around San Cristóbal, That solves the lack of public goods that has kept away the private economic activity (legal insecurity, difficulty to get land, social unrest), and at the same time bring the companies where the available labor is. The experience within Chiapas of companies like Arnecom-Yazaki indicates that with short training periods, workers could be integrated into relatively modern systems and deal productively.
This solution is a step on which we can enter a sustained development dynamic, through successive improvements in productivity derived from the transformation of production and the progressive adoption of more modern production systems. To grow, Chiapas must start by learning to do things that are already produced in the rest of Mexico and can sell out of the state. From there, the economic fabric and knowledge associated with more modern methods of production will be created, and from there gradually the export capacity can be developed and more complex activities can be developed.
La Complejidad Economica de Chiapas
Chiapas es el estado más pobre de México, y también el menos diversificado en su estructura productiva. Según los hallazgos de este reporte, esa dualidad no es una coincidencia casual. La escasa complejidad económica de Chiapas, medida tanto por la escasa sofisticación de sus exportaciones como por la exigua diversidad en la composición de su empleo, es uno de los factores asociados a sus bajos niveles de ingreso y escaso crecimiento. Para cambiar el patrón de crecimiento de Chiapas es necesario cambiar su estructura de producción, haciéndola más compleja y sofisticada.
Afortunadamente, existe un enorme potencial para que diferentes lugares de Chiapas se muevan de manera gradual hacia productos e industrias de mayor sofisticación, con base en el conocimiento con el que ya cuentan hoy en día. No todos los lugares tienen el mismo potencial; la diversidad de capacidades productivas que existe en México se reproduce hacia el interior de Chiapas de manera fractal. Nuestros análisis indican que la variedad de niveles de ingresos hacia adentro de las regiones sigue siendo mayor que las diferencias entre los promedios de esas regiones. Esta característica justifica la utilización de un enfoque municipal, centrado en aquellas zonas urbanas de mayor población, con suficiente diversidad y sofisticación como para justificar un análisis de productos e industrias “adyacentes” de mayor complejidad que requieran capacidades similares a las ya existentes. Este enfoque reconoce que la esperanza en el corto plazo para muchos ciudadanos que no habitan en la vecindad de las regiones más sofisticadas del estado está en la posibilidad de moverse gradualmente hacia niveles de productividad agrícola más alta.
En este reporte se identifican cuáles son los productos e industrias que ofrecen las mejores posibilidades de diversificación productiva para incrementar la complejidad económica de cuatro de los municipios más complejos de Chiapas, considerando sus capacidades iniciales. Como resultado, se presenta un resumen diferenciado de las principales posibilidades y los retos que debe superar cada lugar para capitalizarlas. Comitán de Domínguez debe centrarse en resolver restricciones logísticas asociadas a conflictos sociales para capitalizar sus posibilidades como destino turístico de alto nivel, y desarrollar una base de fabricación de artículos para el hogar y textiles. San Cristóbal de las Casas está bien posicionado para aprovechar las habilidades desarrolladas en la producción de artesanías y transferirlas a la de textiles sofisticados, en adición a nuevas oportunidades en recubrimientos metálicos, y fabricación de alimentos y bebidas. Para materializar el potencial de Tuxtla Gutiérrez se requiere reconvertir ese amplio sector de servicios que responde a la demanda creada por el gasto público en la capital del estado, en una base de manufacturas más diversa. Los principales candidatos para movilizar esa transformación productiva son los sectores de textiles y peletería, procesamiento de alimentos, y ciertas categorías particulares de maquinaria por línea de producción.
De todas las regiones de Chiapas, Tapachula es la que posee mayor potencial para expandir su base exportadora hacia productos de mayor complejidad. La región concentra la mayoría de las exportaciones del estado, y cuenta con la creación de la Zona Económica Especial (ZEE) y su parque industrial que permiten abordar nuevas capacidades productivas más complejas y adyacentes. Se identifica el potencial de los productos plásticos, de pinturas y películas, y de metalurgia, de relojes y equipos de soldadura, como unas oportunidades únicas en el estado para promover su transformación productiva.
Nuestro reporte concluye con una reflexión sobre la necesidad de traducir la identificación de los potenciales de cada una de las regiones en una realidad distinta, en una economía diversa, compleja, y próspera. La transformación productiva de Chiapas comenzará por la mejora de la productividad agrícola y la creación de oportunidades en las zonas urbanas que permiten aglomeraciones de conocimientos diversos en firmas complejas. El crecimiento económico en Chiapas no requiere innovación, sino más bien de que el estado aprenda del resto de México a producir de manera eficiente los bienes que el resto del país ya produce.
Esta posibilidad exige a su vez de la existencia de un sector público capaz de convocar a firmas existentes, y otras que ya operan en el resto de México, para inaugurar nuevas facilidades de producción en Chiapas, combinando nuevas tecnologías y conocimientos con los que ya existen en la región. Así, se va desarrollando de forma gradual la densidad de su tejido productivo y diversidad económica. En última instancia, la clave para capitalizar el enorme potencial de Chiapas está en un cambio en la orientación del discurso productivo, que priorice la diversificación de la economía y la conquista gradual de sectores de mayor complejidad como herramienta para promover el crecimiento inclusivo.
¿Por Que Chiapas es Pobre?
Chiapas es, comoquiera que se le mire, el estado más atrasado de México. Su ingreso por habitante es el más bajo de las 32 entidades federativas, apenas 40% de la media nacional. Su tasa de crecimiento durante la década 2003-2013 también fue la más baja (0,2%), por lo que la brecha que lo separa del promedio nacional creció de 53% a 60%. Eso quiere decir que hoy en día el ingreso promedio de una entidad federal en México está dos veces y media por encima de Chiapas. Los dos estados que le siguen, Oaxaca y Guerrero, están 25% y 30% por encima de Chiapas2. De acuerdo con el Instituto Nacional de Estadística y Geografía de México (INEGI), Chiapas es también el estado de mayor pobreza (74,7%) y pobreza extrema (46,7%).
Self-Discovery in a Development Strategy for El Salvador
El Salvador is a star reformer. After the civil war of the 1980s, the country was able to adopt important political and institutional reforms. These included the incorporation of all political groups into the electoral process, the adoption of a new constitution, the elimination of the military police, the creation of a civilian police with members from both sides of the war, and the adoption of rules to strengthen the independence of the judiciary. On the economic front, the country consolidated its fiscal position, modernized its tax system, liberalized trade and banking, improved the regulation and supervision of its financial system, privatized most state productive assets including energy and telecommunications, and reformed its social security system in line with the Chilean model. It also expanded and granted local autonomy to the school system through the Community-Managed Schools Program (EDUCO). Finally, El Salvador dollarized its financial system in November 2000. Given the investment-grade rating earned by the country, domestic money market rates have converged to U.S. levels.
Unfortunately, El Salvador is not a star performer. Standard theory would predict that such an improvement in the institutional and regulatory environment should be followed by convergence to a higher income level. Instead, after an initial period of recovery that lasted until 1997, real gross national income per capita stagnated at levels comparable to those achieved by the country in the late 1970s. Its income relative to the United States has not recovered from the fall associated with the civil war and is just over half the ratio achieved in the late 1970s.
El Salvador is not alone in finding that reform efforts have had smaller-than-expected
growth effects. With the exception of Chile, the effects of reform ongrowth throughout Latin America have been smaller than the initial estimates carried out in the mid-1990s.In this context, El Salvador is an interesting case, since it has been particularly effective in applying wide-ranging reforms.
This paper explores why these reforms have failed to produce more growth and what can be done about it.2 We begin by placing the economic choices faced by the incoming Salvadoran administration in a regional and historical perspective. The late 1980s and early 1990s in Latin America were preceded by a decade of stagnation, but coincided with a time of unusual confidence in the future. The collapse of communism, the failure of many interventionist policies in Latin America in the 1980s, and Chile’s success gave governments a clear idea of the road they wanted to leave and the road they wanted to take. Inadequate past performance and consensus on the road ahead led to a forceful policy agenda.
Export Diversification in Algeria
This chapter applies new methodologies to examine the history of and future opportunities for export diversification in Algeria. The first section examines Algeria’s productive structure, which is highly concentrated in the hydrocarbons sector. It shows that this pattern of specialization is inconsistent with the country’s endowment of hydrocarbon resources. The lack of export diversification is suggestive of an inefficient distortion, reversal of which should be a clear policy priority.
The second section reviews some of the traditional explanations for a lack of export diversification in an oil-exporting country and shows that these explanations do not seem to hold for Algeria. It offers an alternative explanation, based not on macroeconomic volatility or real exchange rate appreciation but on the specificity of productive capabilities in the oil sector and their substitutability to other activities. This explanation underlies the notion of a “product space,” in which structural transformation occurs.
The third section introduces a new methodology to export diversification in Algeria, which is shown to be specialized in a highly peripheral part of the product space. Even activities that compose the non-oil export basket are highly peripheral in the product space, which helps explain the severe lack of export diversification.
The fourth section applies product space data to Algeria’s industrial strategy, using the methodology to identify high-potential export sectors. This data-driven approach has the benefit of systematically scanning the entire set of potential export goods using an empirically validated methodology. It complements other more qualitative and contextual approaches. This section uses the same methodology to review the sectors already identified by the Algerian government in the new industrial policy.
The last section discusses the policy implications of this analysis. A wide variety of methodologies can be used to generate lists of high potential export sectors; more difficult is determining what to do with such lists. The section offers a few specific policy recommendations and discusses some best practices. But the fact that most required public goods and constraints to investment are sector specific means that recommendations cannot be made at the macro level.
Diagnosing the Binding Constraints on Economic Growth (Belize)
Belize’s long-term growth performance has been comparatively good. It is not clear what comparator group is relevant, given Belize’s status as both a Caribbean and a Central American country. Compared with its Central American counterparts, Belize has been a growth star. In 1960, it was the second-poorest country in the region; now it is among the “top tier” countries, with gross domestic product (GDP) per capita (Figure 1.1) near that of Costa Rica and Panama. Moreover, much of this growth was achieved after independence. Among its Caribbean peers, however, Belize’s performance has been average, and it has not been able to close the gap with the better-performing economies in the region. And since 2004, economic growth has been sluggish, barely above the rate of population growth, implying that reactivating economic growth is a central development challenge for the country.
The Atlas of Economic Complexity: Mapping Paths to Prosperity
Over the past two centuries, mankind has accomplished what used to be unthinkable. When we look back at our long list of achievements, it is easy to focus on the most audacious of them, such as our conquest of the skies and the moon. Our lives, however, have been made easier and more prosperous by a large number of more modest, yet crucially important feats. Think of electric bulbs, telephones, cars, personal computers, antibiotics, TVs, refrigerators, watches and water heaters. Think of the many innovations that benefit us despite our minimal awareness of them, such as advances in port management, electric power distribution, agrochemicals and water purification. This progress was possible because we got smarter. During the past two centuries, the amount of productive knowledge we hold expanded dramatically. This was not, however, an individual phenomenon. It was a collective phenomenon. As individuals we are not much more capable than our ancestors, but as societies we have developed the ability to make all that we have mentioned – and much, much more.
For up-to-date datasets and new visualizations, visit atlas.hks.harvard.edu.