World trade patterns and prices: The role of productivity and quality heterogeneity

This paper analyzes the role of product quality and labor efficiency in shaping the trade patterns and trade intensities within and across two groups of countries, the developed and richer North and the developing South. Recent empirical literature identifies two groups of evidence — the product lines evidence on different export strategies and sources of competitiveness across product groups and countries, and the aggregate trade flows evidence on a positive relation between the income per capita and both export and import prices (also conditional on the exporter). We attempt to provide a theoretical background for these findings and focus on the North–South productivity differences in a four country North–South trade model with two dimensions of firm heterogeneity. Differences in the firms' product quality and cost efficiency impose different competitiveness sources when entering more difficult markets and result in the observed export and import prices and consumption bundles across the rich and poor countries.     

Export diversification: How much does the choice of the trading partner matter?

This paper studies how a country's export diversification varies across destination markets. It develops an extension of the Romalis (2004) model which yields two testable predictions. According to the first, exports between similarly endowed countries (“South–South” and “North–North”) are more diversified than exports between differently endowed countries (“South–North” and “North–South”). The second implication is that, for given countries' production patterns, low bilateral trade costs lead to greater export diversification. These predictions find empirical support in a panel of 102 trade partners and 4998 HS-6 industries over the period 1995–2007. Results show that similarities between trading partners in physical capital, land and human capital endowments per worker are associated with more diversified bilateral exports. Exports are also more diversified when bilateral trade costs are relatively low.     

Trade policy under firm-level heterogeneity in a small economy

We explore the effect of trade policy on productivity and welfare in the now standard model of firm-level heterogeneity and product differentiation with monopolistic competition. To obtain sharp results, we restrict attention to an economy that takes as given the price of imports and the demand schedules for its exports (a “small economy”). We first establish that welfare can be decomposed into four terms: productivity, terms of trade, variety and curvature, where the last is a term that captures heterogeneity across varieties. We then show how a consumption subsidy, an export tax, or an import tariff allows our small economy to deal with two distortions that we identify and thereby reach its first-best allocation. We also show that an export subsidy generates an increase in productivity, but given the negative joint effect on the other three terms (terms of trade, variety, and curvature), welfare falls. In contrast, an import tariff improves welfare in spite of the fact that productivity falls.     

The dynamics of trade and competition

We estimate a version of the Melitz and Ottaviano [Melitz, Marc J. and Ottaviano, Gianmarco I.P., 2008, Market size, trade, and productivity, Review of Economic Studies 75(1), pp. 295-316.] model of international trade with firm heterogeneity. The model is constructed to yield testable implications for the dynamics of prices, productivity and markups as functions of openness to trade at a sectoral level. The theory lends itself naturally to a difference in differences estimation, with international differences in trade openness at the sector level reflecting international differences in the competitive structure of markets. Predictions are derived for the effects of both domestic and foreign openness on each economy. Using disaggregated data for EU manufacturing over the period 1989-1999 we find short run evidence that trade openness exerts a competitive effect, with prices and markups falling and productivity rising. The response of profit margins to openness has implications on the conduct of monetary policy. Consistent with the predictions of some recent theoretical models we find some, albeit weaker, support that the long run effects are more ambiguous and may even be anti-competitive. Domestic trade liberalization also appears to induce pro-competitive effects on overseas markets.     

Quantitative implications of a debt-deflation theory of Sudden Stops and asset prices

This paper shows that the quantitative predictions of an equilibrium asset-pricing model with financial frictions are consistent with key features of the Sudden Stop phenomenon. Foreign traders incur costs in trading assets with domestic agents, and a collateral constraint limits external debt to a fraction of the market value of domestic equity holdings. When this constraint does not bind, standard productivity shocks cause typical real-business-cycle effects. When it binds, the same shocks cause strikingly different effects depending on the leverage ratio and asset market liquidity. With high leverage and a liquid market, the shocks force “fire sales” of assets and Fisher's debt-deflation mechanism amplifies the responses of asset prices, consumption and the current account. Precautionary saving makes these Sudden Stops infrequent in the long run.     

Read my lips: The role of information transmission in multilateral reform design

Context-specific knowledge is crucial to crafting multilateral reform programs. Nonetheless local knowledge often consists of unverifiable information, thus the quality of countries' reports depends on the conflict of interests faced by the recipient and the multilateral. We compare the performance of a “delegation-scheme” against a “centralization-scheme.” We find that recipients' discretion in the choice of reforms (delegation) should only be increased when the countries' local knowledge is strictly more important than the multilateral's information. Conversely, a reduction in the conflict of interests may lead the multilateral in to allowing the recipient less freedom in designing reforms (centralization). Our empirical results support these theoretical predictions.     

Trade deflection and trade depression

This is the first paper to empirically examine whether a country's use of an import restricting trade policy distorts a foreign country's exports to third markets. We first develop a theoretical model of worldwide trade in which the imposition of antidumping and safeguard tariffs, or “trade remedies,” by one country causes significant distortions in world trade flows. We then empirically test this model by investigating the effect of the United States' use of such import restrictions on Japanese exports of roughly 4800 products into 37 countries between 1992 and 2001. Our estimation yields evidence that US restrictions both deflect and depress Japanese export flows to third countries. Imposition of a US antidumping measure against Japan deflects trade, as the average antidumping duty on Japanese exports leads to a 5-7% increase in Japanese exports of the same product to the average third country market. The imposition of a US antidumping measure against a third country depresses trade, as the average US duty imposed on a third country leads to a 5-19% decrease in Japanese exports of that same product to the average third country's market. We also document the substantial variation in trade deflection and trade depression across different importing countries and exported products.     

Currency mismatches and monetary policy: A tale of two equilibria

We develop a model of a small economy whose residents choose whether to borrow in domestic or foreign currency. The central bank, in turn, chooses fixed or flexible exchange rates, taking the currency denomination of debts as given. We characterize the simultaneous determination of portfolios and exchange rate regime. Both floating and fixed rates can occur as equilibrium outcomes. “Fear of floating” may emerge endogenously and in association with a currency mismatch in assets and liabilities. If equilibria with both fixed rates and floating rates coexist, the latter is Pareto superior. Lessons for current “de-dollarization” proposals are discussed.     

Factor Intensity,product switching,and productivity: Evidence from Chinese exporters

This paper analyzes how a firm's specialization in its core products after exporting affects its factor intensity and productivity. Using Chinese manufacturing firm data for the 1998–2007 period, we find that firms become less capital-intensive but more productive after exporting, compared to non-exporters that share similar ex ante characteristics. To rationalize these findings that contrast with existing studies, we develop a variant of the model by Bernard, Redding, and Schott (2010, 2011) to consider firms producing multiple products with varying capital intensity. The model predicts that when a firm in a labor-abundant country starts exporting, it specializes in its core competencies by allocating more resources to produce more labor-intensive products. Firm ex ante productivity is associated with a smaller decline in capital intensity after exporting. A sharper post-export decline in capital intensity is associated with a larger increase in measured total factor productivity. We find firm-level evidence supporting these predictions. Using transaction-level data for the 2000–2006 period, we show that Chinese new exporters add products that are less capital-intensive than their existing products and drop those that are more capital-intensive in subsequent years.     

Bonus vetus OLS: A simple method for approximating international trade-cost effects using the gravity equation

Using a Taylor-series expansion, we solve for a simple reduced-form gravity equation revealing a transparent theoretical relationship among bilateral trade flows, incomes, and trade costs, based upon the model in Anderson and van Wincoop [Anderson, James E., and van Wincoop, Eric. “Gravity with Gravitas: A Solution to the Border Puzzle.” American Economic Review 93, no. 1 (March 2003): 170-192.]. Monte Carlo results support that virtually identical coefficient estimates are obtained easily by estimating the reduced-form gravity equation including theoretically-motivated exogenous multilateral resistance terms. We show our methodology generalizes to many settings and delineate the economic conditions under which our approach works well for computing comparative statics and under which it does not.     

Unobservable skill dispersion and comparative advantage

This paper investigates a theoretical mechanism linking comparative advantage to the distribution of skills in the working population. We develop a tractable multi-country, multi-industry model of trade with unobservable skills in the labour market and show that comparative advantage derives from (i) cross-industry differences in the substitutability of workers' skills and (ii) cross-country differences in the dispersion of skills. We establish the conditions under which higher skill dispersion leads to specialization in industries characterized by higher skill substitutability across tasks. The main results are robust when the model is extended to allow for partial observability of skills. Finally, we use distributions of literacy scores from the International Adult Literacy Survey to approximate cross-country productivity differences due to skill dispersion and we carry out a quantitative assessment of the impact of skill dispersion on the pattern of trade.     

The present-value model of the current account has been rejected: Round up the usual suspects

Tests of the present-value model (PVM) of the current account are frequently rejected by data. Standard explanations rely on the “usual suspects” of non-separable preferences, fiscal policy and world real interest rate shocks, external imperfect international capital mobility, and an internalized risk premium. We confirm these rejections on post-war Canadian data, then investigate their source by calibrating and simulating alternative versions of a small open economy, real business cycle model (RBC). Bayesian Monte Carlo experiments reveal that a “canonical” RBC model is close to the data, but far from the PVM predictions. Although each suspect matters in some way, none improve the fit to the data. However, the PVM restrictions are reproduced when the internalized risk premium is introduced into the canonical model. By adding the exogenous world real interest rate shock to this version of the model, it matches the data better and is moved closer to the PVM predictions. This suggests that there is an important common world component to current account fluctuations, which points to additional underlying macroeconomic factors that drive the current account.     

Vehicle currency use in international trade

We explore the major driving forces for currency invoicing in international trade with a simple model and a novel dataset covering 24 countries. We contrasts a “coalescing” effect, where exporters minimize the movements of their prices relative to their competitors', with incentives to hedge macroeconomic volatility and transaction costs. The key determinants of invoice currency choice are industry features and country size, with some role for foreign-exchange bid-ask spreads. The coalescing effect also goes a long way to explaining the well-known dominance of the dollar. Trade flows to the United States are predominantly invoiced in dollar, as foreign exporters face competition with U.S. firms. The use of the dollar in trade flows that do not involve the United States reflects trade in homogeneous products where firms need to keep their price in line with their competitors'.     

Valuation effects with transitory and trend productivity shocks

Changes in asset prices of a country's foreign assets and liabilities (“valuation effects”) are commonly thought of as stabilizing: they counteract current account movements and mitigate the impact of the current account on the country's net foreign asset (NFA) position. This paper shows that whether valuation effects are stabilizing or not depends critically on the nature of the underlying productivity shocks. In response to transitory shocks, valuation effects are stabilizing; but in response to trend shocks, such effects amplify the impact of the current account on NFA position. These contrasting effects arise because optimally smoothing consumers respond differently to a transitory shock than to a trend shock to income. This theoretical result finds empirical support with G7 countries' data, and is illustrated by the pattern of external imbalances between the U.S. and other G7 countries since the 1990s.     

Negotiating free trade

We develop a dynamic bargaining model in which a leading country endogenously decides whether to sequentially negotiate free trade agreements with subsets of countries or engage in simultaneous multilateral bargaining with all countries at once. We show how the structure of coalition externalities shapes the choice between sequential and multilateral bargaining, and we identify circumstances in which the grand coalition is the equilibrium outcome, leading to worldwide free trade. A model of international trade is then used to illustrate equilibrium outcomes and how they depend on the structure of trade and protection. Global free trade is not achieved when the political-economy motive for protection is sufficiently large. Furthermore, the model generates both “building bloc” and “stumbling bloc” effects of preferential trade agreements. In particular, we describe an equilibrium in which global free trade is attained only when preferential trade agreements are permitted to form (a building bloc effect), and an equilibrium in which global free trade is attained only when preferential trade agreements are forbidden (a stumbling bloc effect). The analysis identifies conditions under which each of these outcomes emerges.     

Globalization and domestic conflict

When a resource like oil is domestically contested, trade patters and welfare can be very different than when property rights are costlessly enforced. Whereas (small-country) importers of the contested resource gain unambiguously relative to autarky, exporters of the contested resource lose under free trade, unless the world price of the resource is sufficiently high. Regardless of what price obtains in world markets, countries tend to over-export the contested resource compared to the absence of conflict. For a wide range of prices, higher international prices of the contested resource reduce welfare, an instance of the “natural resource curse.”     

The Dilemma of Pull and Push-Price Promotions

Should manufacturers of products such as automobiles and household appliances offer cash rebates to all consumers at the time of purchase, or offer trade deals to retailers? The authors conduct an analytical inquiry that shows that choosing between these two types of price promotion critically depends on the consumer sensitivity to both regular and promotional prices. More specifically, when consumers are more (less) sensitive to promotions than to regular prices, manufacturers are better (worse) off offering trade deals (consumer rebates) rather than consumer rebates (trade deals). Consistent with traditional predictions found in the economic literature, either of the two promotions can be offered indiscriminately if consumers make no difference between promotional offers and regular-price reductions. The theoretical and managerial implications of these findings are discussed.     

Consumer Sovereignty in Healthcare: Fact or Fiction?

We pose the question: Is consumer sovereignty in the healthcare market fact or fiction? Consumer sovereignty in healthcare implies that society benefits at large when healthcare organizations compete to develop high quality healthcare products while reducing the cost of doing business (reflected in low prices), and when consumers choose wisely among healthcare products by purchasing those high quality products at low prices. We develop a theoretical model that encourages systematic empirical research to investigate whether consumer sovereignty in healthcare is fact or fiction. In doing so, we develop a series of theoretical propositions that may demonstrate that consumer sovereignty is more fiction than fact. Specifically, healthcare consumers lack the ability, motivation, and opportunity to choose healthcare products that are high in quality and low in price. Similarly, healthcare firms lack the ability, motivation, and opportunity to compete in ways to develop and market higher quality products at lower prices.     

Innovation and trade with heterogeneous firms

This paper examines how trade liberalization affects the innovation incentives of firms, and what this implies for industry productivity. For this purpose we develop a reciprocal dumping model of international trade with heterogeneous firms and endogenous R&D. Among the robust results that hold both in the short run when there is no entry, and in the long run under free entry are that trade liberalization increases aggregate R&D when trade costs are low and decreases R&D when trade costs are high. Expected industry productivity rises as trade costs fall.     

Economic integration agreements and the margins of international trade

One of the main policy sources of trade–cost changes is the formation of an economic integration agreement (EIA), which potentially affects an importing country's welfare. This paper: (i) provides the first evidence using gravity equations of both intensive and extensive (goods) margins being affected by EIAs employing a panel data set with a large number of country pairs, product categories, and EIAs from 1962 to 2000; (ii) provides the first evidence of the differential (partial) effects of various “types” of EIAs on these intensive and extensive margins of trade; and (iii) finds a novel differential “timing” of the two margins' (partial) effects with intensive-margin effects occurring sooner than extensive-margin effects, consistent with recent theoretical predictions. The results are robust to correcting for potential sample-selection, firm-heterogeneity, and reverse causality biases.