Jaume Ventura

Economic Growth with Bubbles

This paper presents a stylized model of economic growth with bubbles. This model views asset price bubbles as a market-generated device to moderate the effects of frictions in financial markets, improving the allocation of investments and raising the capital stock and welfare. The model illustrates various channels through which asset price bubbles affect the incentives for innovation and economic reforms, and therefore, the rate of economic growth. The model also offers a new perspective on the effects of financial development on asset price bubbles and economic growth.

Comparative Advantage and the Cross-Section of Business Cycles

Business cycles are both less volatile and more synchronized with the world cycle in rich countries than in poor ones. We develop two alternative explanations based on the idea that comparative advantage causes rich countries to specialize in industries that use new technologies operated by skilled workers, while poor countries specialize in industries that use traditional technologies operated by unskilled workers. Since new technologies are difficult to imitate, the industries of rich countries enjoy more market power and face more inelastic product demands than those of poor countries. Since skilled workers are less likely to exit employment as a result of changes in economic conditions, industries in rich countries face more inelastic labour supplies than those of poor countries. We show that either asymmetry in industry characteristics can generate cross-country differences in business cycles that resemble those we observe in the data.

Current Accounts in the Long and Short Run

Faced with income fluctuations, countries smooth their consumption by raising savings when income is high, and vice versa. How much of these savings do countries invest at home and abroad? In other words, what are the effects of fluctuations in savings on domestic investment and the current account? In the long run, we find that countries invest the marginal unit of savings in domestic and foreign assets in the same proportions as in their initial portfolio, so that the latter is remarkably stable. In the short run, we find that countries invest the marginal unit of savings mostly in foreign assets, and only gradually do they rebalance their portfolio back to its original composition. This means that countries not only try to smooth consumption, but also domestic investment. To achieve this, they use foreign assets as a buffer stock.

Rethinking the Effects of Financial Liberalization

During the last few decades, many emerging markets have lifted restrictions on cross-border financial transactions. The conventional view was that this would allow these countries to: (i) receive capital inflows from advanced countries that would finance higher investment and growth; (ii) insure against aggregate shocks and reduce consumption volatility; and (iii) accelerate the development of domestic financial markets and achieve a more efficient domestic allocation of capital and better sharing of individual risks. However, the evidence suggests that this conventional view was wrong. In this paper, we present a simple model that can account for the observed effects of financial liberalization. The model emphasizes the role of imperfect enforcement of domestic debts and the interactions between domestic and international financial transactions. In the model, financial liberalization might lead to different outcomes: (i) domestic capital flight and ambiguous effects on net capital flows, investment, and growth; (ii) large capital inflows and higher investment and growth; or (iii) volatile capital flows and unstable domestic financial markets. The model shows how these outcomes depend on the level of development, the depth of domestic financial markets, and the quality of institutions

Bubbles and Capital Flows

This paper presents a stylized model of international trade and asset price bubbles. Its central insight is that bubbles tend to appear and expand in countries where productivity is low relative to the rest of the world. These bubbles absorb local savings, eliminating inefficient investments and liberating resources that are in part used to invest in high productivity countries. Through this channel, bubbles act as a substitute for international capital flows, improving the international allocation of investment and reducing rate-of-return differentials across countries. This view of asset price bubbles has unexpected implications for the way we think about economic growth and fluctuations, and could eventually provide a simple account of some real world phenomenae that have been difficult to model before, such as the recurrence and depth of financial crises or their puzzling tendency to propagate across countries.

Comparative Advantage and the Cross-section of Business Cycles

Business cycles are both less volatile and more synchronized with the world cycle in rich countries than in poor ones. We develop two alternative explanations based on the idea that comparative advantage causes rich countries to specialize in industries that use new technologies operated by skilled workers whereas poor countries specialize in industries that use traditional technologies operated by unskilled workers. (1) Because new technologies are difficult to imitate, the industries of rich countries enjoy more market power and face more inelastic product demand than those of poor countries. (2) Because skilled workers are less likely to exit employment as a result of changes in economic conditions, industries in rich countries face more inelastic labor supplies than those of poor countries. We show that either asymmetry in industry characteristics can generate cross-country differences in business cycles that resemble those we observe in the data. (JEL: E32, FA5, F41) (c) 2007 by the European Economic Association.

Debt into Growth: How Sovereign Debt Accelerated the First Industrial Revolution

Why did the country that borrowed the most industrialize first? Earlier research has viewed the explosion of debt in 18th century Britain as either detrimental, or as neutral for economic growth. In this paper, we argue instead that Britain’s borrowing boom was beneficial. The massive issuance of liquidly traded bonds allowed the nobility to switch out of low-return investments such as agricultural improvements. This switch lowered factor demand by old sectors and increased profits in new, rising ones such as textiles and iron. Because external financing contributed little to the Industrial Revolution, this boost in profits in new industries accelerated structural change, making Britain more industrial more quickly. The absence of an effective transfer of financial resources from old to new sectors also helps to explain why the Industrial Revolution led to massive social change – because the rich nobility did not lend to or invest in the revolutionizing industries, it failed to capture the high returns to capital in these sectors, leading to relative economic decline.

Globalization and Political Structure

The first wave of globalization (1830-1914) witnessed a decline in the number of countries from 125 to 54. Political consolidation was often achieved through war and conquest. The second wave of globalization (1950-present) has led instead to an increase in the number of countries to a record high of more than 190. Political fragmentation has been accompanied by the creation of peaceful structures of supranational governance. This paper develops a theoretical model of the interaction between globalization and political structure that accounts for these trends and their reversal. We show that political structure adapts to steadily expanding trade opportunities in a non-monotonic way. Borders hamper trade. In its early stages, the political response to globalization consists of removing borders by increasing country size. War is then an appealing way of conquering markets. In its later stages, however, the political response to globalization is to remove the cost of borders by creating international economic unions. As a result, country size declines and negotiation replaces war as a tool to ensure market access.

Sovereign Risk, Anonymous Markets, and the Effects of Globalization

The goal of this paper is to study the effects of globalization on the workings of asset markets and welfare. To do this, we adopt a technological view of the globalization process. That is, we model this process as consisting of a gradual (and exogenous) reduction in the costs of shipping goods across different regions of the world. In the absence of market frictions, globalization creates foreign trade opportunities without affecting domestic ones and, as a result, unambiguously raises welfare. In the presence of sovereign risk, however, globalization can either create or destroy both domestic and foreign trade opportunities. The net effect on welfare of this process of creation and destruction of trade opportunities might be either positive or negative. We also find that asset bubbles moderate this welfare effect. When globalization is welfare reducing, asset bubbles grow creating a positive wealth effect, and vice versa. This might come at a cost though. Asset bubbles reduce the incentives to implement reforms aimed at reducing sovereign risk.