Faculty Working Papers

Kremer, M. & Snyder, C., 2013. When is Prevention More Profitable than Cure? The Impact of Time-Varying Consumer Heterogeneity.Abstract

We argue that in pharmaceutical markets, variation in the arrival time of consumer heterogeneity creates differences between a producer’s ability to extract consumer surplus with preventives and treatments, potentially distorting R&D decisions. If consumers vary only in disease risk, revenue from treatments—sold after the disease is contracted, when disease risk is no longer a source of private information—always exceeds revenue from preventives. The revenue ratio can be arbitrarily high for sufficiently skewed distributions of disease risk. Under some circumstances, heterogeneity in harm from a disease, learned after a disease is contracted, can lead revenue from a treatment to exceed revenue from a preventative. Calibrations suggest that skewness in the U.S. distribution of HIV risk would lead firms to earn only half the revenue from a vaccine as from a drug. Empirical tests are consistent with the predictions of the model that vaccines are less likely to be developed for diseases with substantial disease-risk heterogeneity.

Hausmann, R., et al., 2014. Implied Comparative Advantage. CID Working Paper , 276.Abstract

The comparative advantage of a location shapes its industrial structure. Current theoretical models based on this principle do not take a stance on how comparative advantages in different industries or locations are related with each other, or what such patterns of relatedness might imply about the underlying process that governs the evolution of comparative advantage. We build a simple Ricardian-inspired model and show this hidden information on inter-industry and inter-location relatedness can be captured by simple correlations between the observed patterns of industries across locations or locations across industries. Using the information from related industries or related locations, we calculate the implied comparative advantage and show that this measure explains much of the location’s current industrial structure. We give evidence that these patterns are present in a wide variety of contexts, namely the export of goods (internationally) and the employment, payroll and number of establishments across the industries of subnational regions (in the US, Chile and India). The deviations between the observed and implied comparative advantage measures tend to be highly predictive of future industry growth, especially at horizons of a decade or more; this explanatory power holds at both the intensive as well as the extensive margin. These results suggest that a component of the long-term evolution of comparative advantage is already implied in today’s patterns of production.

Revised July 2020.
Bahar, D., Hausmann, R. & Hidalgo, C., 2012. Neighbors and the Evolution of the Comparative Advantage of Nations: Evidence of International Knowledge Diffusion?.Abstract

The literature on knowledge diffusion shows that it decays strongly with distance. In this paper we document that the probability that a product is added to a country’s export basket is, on average, 65% larger if a neighboring country is a successful exporter of that same product. For existing products, having a neighbor with comparative advantage in them is associated with a growth of exports that is higher by 1.5 percent per annum. While these results could be driven by a common third factor that escapes our controls, they are what would be expected from the localized character of knowledge diffusion.

Ashraf, Q.H., Weil, D.N. & Wilde, J., 2012. The Effect of Fertility Reduction on Economic Growth.Abstract

We assess quantitatively the effect of exogenous reductions in fertility on output per capita. Our simulation model allows for effects that run through schooling, the size and age structure of the population, capital accumulation, parental time input into child-rearing, and crowding of fixed natural resources. The model is parameterized using a combination of microeconomic estimates, data on demographics and natural resource income in developing countries, and standard components of quantitative macroeconomic theory. We apply the model to examine the effect of a change in fertility from the UN medium-variant to the UN low-variant projection, using Nigerian vital rates as a baseline. For a base case set of parameters, we find that such a change would raise output per capita by 5.6 percent at a horizon of 20 years, and by 11.9 percent at a horizon of 50 years.

Pritchett, L. & Viarengo, M., 2013. The State, Socialization, and Private Schooling: When Will Governments Support Alternative Producers?.Abstract

Understanding the institutional features that can improve learning outcomes and reduce inequality is a top priority for international and development organizations around the world. Economists appear to have a good case for support to non-governmental alternatives as suppliers of schooling. However, unlike other policy domains, freer international trade or privatization, economists have been remarkably unsuccessful in promoting the adoption of this idea. We develop a simple general positive model of why governments typically produce schooling which introduces the key notion of the lack of verifiability of socialization and instruction of beliefs, which makes third party contracting for socialization problematic. We use the model to explain variations around the world in levels of private schooling. We also predict the circumstances in which efforts to promote the different alternatives to government production – like charter, voucher, and scholarship - are likely to be successful.

Frankel, J., 2012. The Natural Resource Curse: A Survey of Diagnoses and Some Prescriptions.Abstract

Countries with oil, mineral or other natural resource wealth, on average, have failed to show better economic performance than those without, often because of undesirable side effects. This is the phenomenon known as the Natural Resource Curse. This paper reviews the literature, classified according to six channels of causation that have been proposed. The possible channels are: (i) long-term trends in world prices, (ii) price volatility, (iii) permanent crowding out of manufacturing, (iv) autocratic/oligarchic institutions, (v) anarchic institutions, and (vi) cyclical Dutch Disease. With the exception of the first channel – the long-term trend in commodity prices does not appear to be downward – each of the other channels is an important part of the phenomenon. Skeptics have questioned the Natural Resource Curse, pointing to examples of commodity-exporting countries that have done well and arguing that resource exports and booms are not exogenous. The relevant policy question for a country with natural resources is how to make the best of them.

Frankel, J.A., Vegh, C.A. & Vuletin, G., 2012. On Graduation from Fiscal Procyclicality.Abstract

In the past, industrial countries have tended to pursue countercyclical or, at worst, acyclical fiscal policy. In sharp contrast, emerging and developing countries have followed procyclical fiscal policy, thus exacerbating the underlying business cycle. We show that, over the last decade, about a third of the developing world has been able to escape the procyclicality trap and actually become countercyclical. We then focus on the role played by the quality of institutions, which appears to be a key determinant of a country's ability to graduate. We show that, even after controlling for the endogeneity of institutions and other determinants of fiscal procyclicality, there is a causal link running from stronger institutions to less procyclical or more countercyclical fiscal policy.

Pritchett, L. & Kenny, C., 2013. Promoting Millennium Development Ideals: The Risks of Defining Development Down.Abstract

The approach of 2015, the target date of the Millennium Development Goals, sets the stage for a global reengagement on the question of "what is development?" We argue that the post-2015 development framework for development should include Millennium Development Ideals which put into measurable form the high aspirations countries have for the well-being of their citizens. Standing alone, low bar targets like the existing Millennium Development Goals "define development down" and put at risk both domestic and global coalitions to support to an inclusive development agenda. Measuring development progress exclusively by low bar targets creates the illusion that specific targeted programs can be an adequate substitute for a broad national and global development agenda.

Torres, R.C., 2012. Capital and Labor Mobility and the Size of Sub-national Governments: Evidence from a Panel of Mexican States.Abstract

We examine in this paper the relation between government size and capital and labor openness employing a panel of the 32 Mexican states over the period 1996-2006. Making use of two alternative measures of capital and labor openness and employing several alternative econometric specifications, we first find systematic positive effects of our openness measures on the size of the states’ total government spending. Thereafter, we break down total government expenditure and focus on three subcategories of spending associated with social welfare: education, health and poverty alleviation programs. We find that FDI flows, our proxy for capital openness, are not significant determinants of the state’s social spending, but labor openness, in the form of international migration, has a significant and even greater impact on some of the aforementioned categories than on total spending.

Klimek, P., Hausmann, R. & Thurner, S., 2012. Empirical Confirmation of Creative Destruction from World Trade Data.Abstract

We show that world trade network datasets contain empirical evidence that the dynamics of innovation in the world economy follows indeed the concept of creative destruction, as proposed by J.A. Schumpeter more than half a century ago. National economies can be viewed as complex, evolving systems, driven by a stream of appearance and disappearance of goods and services. Products appear in bursts of creative cascades. We find that products systematically tend to co-appear, and that product appearances lead to massive disappearance events of existing products in the following years. The opposite – disappearances followed by periods of appearances – is not observed. This is an empirical validation of the dominance of cascading competitive replacement events on the scale of national economies, i.e. creative destruction. We find a tendency that more complex products drive out less complex ones, i.e. progress has a direction. Finally we show that the growth trajectory of a country’s product output diversity can be understood by a recently proposed evolutionary model of Schumpeterian economic dynamics.

Diwan, I., 2013. Who are the Democrats? Leading Opinions in the Wake of Egypt's 2011 Popular Uprisings.Abstract

I look at changes in public opinion in Egypt, using the two waves of 2000 and 2008 of the World Value Survey. I find that during this period, there has been a major increase in popular support for democracy, a sizable rise in concerns about inequality, and a fall in support for political Islam. I examine the extent to which these changes are connected, and how they clustered along class, age, and education lines. The main findings are that while in 2000, younger Egyptians were more progressive than their parents, by 2008, Egyptian society had become much more organized around class interests and showed little inter-generational differentiation. New democrats come from all backgrounds, but with a concentration among those on the left. Among social classes, the middle class emerges as the main champion for democracy, driven by both aspiration and grievances motives

Rodríguez-Oreggioa, E. & Flores, M., 2012. Structural Factors and the "War on Drugs" Effects on the Upsurge in Homicides in Mexico.Abstract

Violence has increased all around Mexico in the last years, reflecting an uprise in the rate of homicides, and especially after some federal intervention took place to fight the drug cartels in some states. In this paper we use data at the municipal level to link social and institutional factors with the rates of homicides. We exploit the entrance for federal army interventions in 2007 and 2008 in some states to fight drug cartels. Using different estimation methods, we find that inequality, access to social security and income, as well as local provision of security and law are relevant in explaining homicides. We also find that the army interventions have increased not only drug related homicides, but also general homicides in municipalities under intervention compared with those with no intervention.

Bustos, S., et al., 2012. The Dynamics of Nestedness Predicts the Evolution of Industrial Ecosystems.Abstract

Decades of research in ecology have shown that nestedness is a ubiquitous characteristic of both, biological and economic ecosystems. The dynamics of nestedness, however, have rarely been observed. Here we show that the nestedness of both, the network connecting countries to the products that they export and the network connecting municipalities to the industries that are present in them, remains constant over time. Moreover, we find that the conservation of nestedness is sustained by both, a bias for industries that deviate from the networks' nestedness to disappear, and a bias for the industries that are missing according to nestedness to appear. This makes the appearance and disappearance of individual industries in each location predictable. The conservation of nestedness in industrial ecosystems, and the predictability implied by it, demonstrates the importance of industrial ecosystems in the long term survival of economic activities.

Rodrik, D., 2012. Who Needs the Nation State?.Abstract

The nation state has few friends these days. It is roundly viewed as an archaic construct that is at odds with 21st century realities. It has neither much relevance nor much power, analysts say. Increasingly, it is non-governmental organizations, global corporate social responsibility, or global governance on which pundits place their faith to achieve public purpose and social goals. It is common to portray national politicians as the sole beneficiary of the nation state, on which their privileges and lofty status depend.

The assault on the nation state transcends traditional political divisions, and is one of the few things that unite economic liberals and socialists. "How may the economic unity of Europe be guaranteed, while preserving complete freedom of cultural development to the peoples living there?" asked Leon Trotsky in 1934. The answer was to get rid of the nation state: "The solution to this question can be reached ... by completely liberating productive forces from the fetters imposed upon them by the national state."2Trotsky’s answer sounds surprisingly modern in light of the euro zone’s current travails. It is one to which most neoclassical economists would subscribe.

Hausmann, R., et al., 2014. How should Uganda grow?.Abstract

Income per capita in Uganda has doubled in the last 20 years. This remarkable performance has been buoyed by significant aid flows and large external imbalances. Economic growth has been concentrated in non-tradable activities leading to growing external imbalances and a growing gap between rural and urban incomes. Future growth will depend on achieving sufficient export dynamism. In addition, growth faces a number of other challenges: low urbanization rate, rapid rural population growth and high dependency ratios. However, both the dependency ratio and fertility rates have begun to decline recently. Rural areas are also severely overcrowded with low-productivity subsistence agriculture as a pervasive form of production. Commercial agriculture has great possibilities to increase output, but as the sector improves its access to capital, inputs and technology it will shed jobs rather than create them.

These challenges combined tell us that future growth in Uganda will require a rapid rate of export growth and economic diversification. The country faces the prospect of an oil boom of uncertain size and timing. It could represent an important stepping stone to achieve external sustainability, expanded income and infrastructure and a greater internal market. However, as with all oil booms, the challenges include avoiding the Dutch disease, managing the inevitable volatility in oil incomes and avoiding inefficient specialization in oil. Policies that set targets for the non-oil deficit could help manage some of these effects, but a conscious strategy to diversify would still be needed.

The best strategy is therefore to use the additional oil revenue and accompanying investments to promote a diversification strategy that is sustainable. To determine how to encourage such a transformation, we draw on a new line of research that demonstrates how development seldom implies producing more of the same. Instead, as countries grow, they tend to move into new industries, while they also increase productivity in existing sectors. In this report, we analyze what those new industries might be for Uganda.

To do so, we first look to those products which balance the desire to increase the diversification and complexity of production, while not over-stretching existing capabilities. These include mostly agricultural inputs, such as agrochemicals and food processing. In addition, Uganda should concurrently develop more complex industries, such as construction materials, that are reasonably within reach of current capabilities and will be in great demand in the context of an oil boom. Here, the fact that Uganda is landlocked and faces high import costs will provide natural protection to the expanding demand in Uganda and neighboring countries. We conclude with a discussion of the government policies that will support Uganda in developing new tradable industries.