Discounting long run average growth in stochastic dynamic programs

Summary. Finding solutions to the Bellman equation often relies on restrictive boundedness assumptions. In this paper we develop a method of proof that allows to dispense with the assumption that returns are bounded from above. In applications our assumptions only imply that long run average (expected) growth is sufficiently discounted, in sharp contrast with classical assumptions either absolutely bounding growth or bounding each period (instead of long run) maximum (instead of average) growth. We discuss our work in relation to the literature and provide several examples. Received: July 26, 2000; revised version: July 10, 2002 RID="*" ID="*" I am specially grateful to Cuong Le Van and to anonymous referee for detecting an error in a previous version of this paper and for suggestions that sensibly improved the paper. Comments and suggestions are also acknowledged to Michele Boldrin, Raouf Boucekkine, Fabrice Collard, Tim Kehoe, Omar Licandro, and Luis Puch. I am also indebted to participants to the III Summer School on Economic Theory held at the Universidade de Vigo, the Macroeconomics Workshop at the Universitat Autò}noma de Barcelona, and the Econometrics Seminar at Tilburg University. Financial support from the Belgian government, under project PAI P4/01, at the IRES-UCL, from a European Marie Curie fellowship, Grant HPMF-CT-1999-00410, at the CEPREMAP, and from IVIE and Spanish Ministerio de Ciencia y Tecnología and FEDER, under project BEC2001-0535, at the Universidad de Alicante, is gratefully acknowledged.     

An evaluation of the performance of an applied general equilibrium model of the Spanish economy

Summary In 1985–86 the authors were members of a team that constructed a static applied general equilibrium model that was used to analyze the impact on the Spanish economy of the 1986 fiscal reform, which accompanied Spain's entry into the European Community. This paper compares the results obtained to recently published data for 1985–87; we find that the model performed well in predicting the changes in relative prices and resource allocation that actually occurred, particularly if we incorporate exogenous shocks that affected the Spanish economy in 1986. We also analyze the sensitivity of the results to alternative specifications of the labor market and macroeconomic closure rules; we find that the central results are robust.We gratefully acknowledge financial support from NSF Grant SES 89-22036 (Kehoe) and CICYT Grant PB 89 + 0309 (Polo and Sancho). We thank participants in the IIASA Applied General Equilibrium Conference, Laxenburg, Austria, August 1991; the International Trade Workshop at UCLA, March 1992; the Graduate Public Finance Course at the University of Minnesota, Winter 1993; Antonio Gomez Gomez-Plana; and Betsy Caucutt for helpful suggestions. Above all, we wish to thank our colleagues who have worked with us on the MEGA (Model d'Equilibri General Aplicat) Project at the Universitat Autònoma de Barcelona: Antonio Manresa, Pedro Javier Noyola, Jaime Serra-Puche, Cristina Echevarria, Walter Garcia, Ana Laborda, and Xavier Ramirez. The views expressed herein are those of the authors and not necessarily those of the Federal Reserve Bank of Minneapolis or the Federal Reserve System.     

Bertrand Games and Sharing Rules

We consider asymmetric Bertrand games with arbitrary payoffs at ties or sharing rules, and identify sufficient conditions for the zero-profit outcome and the existence of Nash equilibria. Subject to some technical conditions on non-tied payoffs the following hold. If the sharing rule is strictly tie-decreasing all players but one receive zero equilibrium payoffs, while everybody does so if non-tied payoffs are symmetric. Mixed (pure) strategy Nash equilibria exist if the sharing rule is (norm) tie-decreasing and coalition-monotone. I would like to thank Fernando Branco, the audience at Pompeu Fabra (Barcelona), ISEG (Lisbon), University of Mannheim, ESEM 2003 (Venice), EARIE 2005 (Porto), two anonymous referees, and the editor Dan Kovenock for very useful comments. This research received financial support under project POCTI/ECO/37925/2001 of FCT and FEDER.     

Conduct effects of gradual entry liberalization in insurance

The effects of rate regulation on insurance have been profusely investigated in the empirical literature but less is known about the effects of entry liberalization.We investigate the effects of an entry liberalization process on conduct of insurance firms under a rate regulation system. An explicit model of oligopolistic interaction is proposed and an application to the Portuguese auto-insurance market is reported.The results show that coordination between insurance firms was only temporarily upset by a gradual liberalization on entry conditions, with firms resuming almost immediately a coordinated equilibrium.I am thankful to Luís Cabrai, António Leite, José Mata, Vasco Santos, and the referees for useful suggestions. Financial support from an EC Human Capital Mobility Fellowship, grant ERBCHBGCT920147, and the hospitality of Universitat Autònoma de Barcelona are gratefully acknowledged. The usual disclaimer applies.     

Valuation and Management of Fishing Resources Under Price Uncertainty

The traditional expected-net-present-value methods cannot properly capture the management flexibility and strategic value aspects of a fishery, and may understate its value. Instead, this paper develops a Real Options model to conceptualize and evaluate fishery exploitation flexibility. Specifically, general models to value the opportunity to either exploit or invest in a fishery are presented. They suffice to determine not only these values, but also the optimal policy for opening, closing, delaying and setting its harvest rate. The sustainable case in which the harvest rate equals the natural net growth function is also considered. Concerning the exploitation decision, it is found that, as could be expected, the higher the resource price the higher the value of this opportunity in both models (general and sustainable). However, the resource stock affects both models differently. As to the investment opportunity, its value is always lower than the exploitation opportunity because of investment costs. Finally, numerical simulations are run in order to illustrate the nature of the solution. Sensitivity analysis concerning the influence of the tax rate, convenience yield, risk-free interest rate and price volatility on the value of the fishery is also reported. Earlier versions of this paper have benefited from conference participants at the Young Economists Conference 2000 (Oxford University), Tenth Biennial Conference of the International Institute of Fisheries Economics and Trade (Oregon State University), XXV Simposio de Análisis Económico (Universidad Autónoma de Barcelona, Spain) and Seminar at the Dpt. Fundamentos del Análisis Económico (Universidad del País Vasco, Spain). We especially thank Prof. Ian Bateman and two anonymous referees whose insightful comments have enabled us to eliminate several errors and to improve the presentation. Murillas gratefully acknowledges doctoral fellowship from Ministerio de Educación y Ciencia (AP96), and financial support from the Xunta de Galicia (PGIDT01PXI30004PR) and from the Ministerio de Ciencia y Teconología (SEC 2001-3700). The usual disclaimer applies.     

Innovation and productivity in the food vs. the high-tech manufacturing sector

ABSTRACT

The food sector is considered a mature industry characterized by low research and development (R&D) intensity. Nevertheless, food companies face numerous challenges and cannot do without innovation activity if they want to keep their competitiveness. In this study, we examine the impact of innovation on labor productivity in European food companies and compare it to results for firms operating in high-tech sectors. The central motivation of our study is that the low R&D intensity observed in the food sector should be mirrored in different productivity effects of innovation when compared to the high-tech sector. We use microdata from the European Union's ‘Community Innovation Survey’ (CIS) and apply an endogeneity-robust multi-stage model that has been applied by various recent studies. Our results point out major differences between the examined subsectors. While we find strong positive effects of innovation on labor productivity for food firms, we find insignificant effects in the high-tech sector. This might suggest that the returns to innovation might be best evaluated separately by sector rather than for the manufacturing sector as a whole.     

The Strategic Social Map of a Nongovernmental Organization

Currently, the traditional states-nation, as far as their social commitments are concerned, are giving way to the nongovernmental organizations (NGO). These organizations have a mission, strategy, and goals different from those organizations looking simply for profits. Nevertheless, NGOs are concerned about using management and information systems at least as good as those used by private companies. Organizations try to develop a social strategy taking their social responsibility as starting point. In this paper, the authors describe how to fix the organization mission, its strategy and goals, and also how to make its action map. A strategy proposal will be described, as well as the way on how to put it into practice. The main goals of this paper is to describe the mission, strategy, and goals of the organization; design its strategic social map; fix the limits of the organization's action; apply the theoretical model to a NGO; and design an information model in order to manage the strategic development. The authors would like to express their gratitude to M. Dolors Celma Benaiges, lecturer at the Escola Universitària del Maresme, Universitat Pompeu Fabra, for her assistance reviewing and translating the paper.     

Recent developments in EC USSR commercial and economic relations

Conclusion Trade with the Soviet Union represents only a small part of total Community trade (3.5 % of EC imports and 2.7 % of EC exports in 1990). EC imports from the Soviet Union increased moderately between 1989 and 1990 as well as between the first six months of 1990 and the corresponding period of 1991, whilst EC exports decreased sharply as a result of hard currency shortage in the Soviet Union.The CMEA and Soviet disintegration processes will lead to a substantial reorientation of trade flows. This development has already begun with large increases of trade between the EC and the Central and Eastern European countries.International assistance to the USSR mainly consists of export credits. Community assistance involves a large proportion of grants and technical assistance. The cost of assistance measures envisaged so far remains limited for Western countries.The economic effects of assistance would be enhanced if effective coordination was implemented among the providers. Adequate mechanisms such as triangular operations or the untying of assistance would be required in order to avoid crowding out traditional suppliers from Soviet markets.     

Poland's agricultural sector under transformation

The Polish agricultural sector and food processing industry was the first industry to follow market economy because of agriculture's significance in the Polish economy and the dominant role of private ownership in agriculture. Full price liberalization, internal convertibility of the Polish currency, and liberalization of foreign trade completely changed the situation in agriculture. The main objective of this paper is to test the existence of market processes using monthly data from the agriculture and food processing industry covering the time period 1990–92. The largest part of the estimation is dedicated to agricultural products' and foodstuffs' prices. Typical demand-supply relations are observed on the pig, cattle, and milk markets only. In many equations, such variables like imports and exports of agricultural goods are not significant.     

Models of export instability and empirical tests for less-developed countries

Alternative models are developed in which export earnings instability is generated by domestic supply, domestic demand or foreign demand fluctuations. Their relative merits over the 1957–1972 period are examined through multiple regression analysis for a sample of 50 LDCs, with breakdown into sub-samples based on the type of commodity exported and the nature of foreign markets. The results suggest that export instability originates mainly from foreign sources - especially variations of market shares in foreign markets and commodity groups. However, domestic supply and demand fluctuations are the dominant factors for countries highly-dependent on food exports. Geographic concentration is an important factor for countries dependent on food exports and developed-country markets.     

Employment and Capital Accumulation in Unionised Labour Markets: Evidence from five south-European countries

This paper analyses the link between employment and capital accumulation in unionised labour markets by using a dynamic monopoly union model. The role of wage setting is also explored within the above context. The empirical analysis is based on annual data from the manufacturing sector of five European countries (France, Greece, Italy, Portugal and Spain). It verifies that capital accumulation has a positive influence on employment. Concerning wages, there is evidence that, in most countries, income opportunities in the public sector play an important role in wage determination. A larger public sector crowds out private investment and employment by serving as a safety net that allows wage setters to push for higher wage demands.     

EASTERN EUROPEAN EXPORT PERFORMANCE DURING THE TRANSITION

During the past decade, the structure of Eastern European exports has undergone a deep transformation, as communist bloc trading relationships have collapsed and trade with the West has increased. The extent of this geographical re-orientation has generally exceeded the predictions of equilibrium models developed by Hamilton and Winters (1992) and Collins and Rodrik (1991). Significant changes in the product composition of Eastern European exports have accompanied the geographical re-orientation. Exports of manufacturing goods to former communist countries have declined sharply, but exports to the European Community across an array of goods—including heavy machinery—have grown robustly. The observed changes in export composition appear to reflect the redirection of physical goods through price competition and the emergence of market-determined comparative advantage.     

European policy and markets: Did policy initiatives stem the sovereign debt crisis in the euro area?

We investigate how European policy initiatives influenced market assessments of sovereign default risk and banking sector fragility during the sovereign debt crisis in four adversely affected countries — Portugal, Ireland, Spain and Italy. We focus on three broad groups of policies: (a) ECB policy actions (monetary and financial support), (b) EU programs (financial and fiscal rules as well as financial support in crisis countries), and (c) domestic austerity programs. We measure immediate market impact effects: what policies changed risk perceptions, using CDS spreads on sovereign bonds and banks in this assessment. We employ dynamic panel and event study methodologies in the empirical work. We find that a number of programs initially stabilized sovereign and bank bond markets (e.g. Outright Monetary Transactions program), although announcement and implementation impacts on markets differed in some cases (e.g. second Covered Market Bond Program). Actions designed to shore up sovereign markets often lowered risk assessments in bank bond markets and policies designed to ensure safety and soundness of the European banking system in some cases significantly impacted sovereign debt markets. Finally, a number of policies designed to stabilize markets had surprisingly little immediate impact on either sovereign or bank bond market risk assessments.     

The effect of the euro on aeronautic trade: A French regional analysis

After describing the spatial distribution of the aeronautic industry in France, this study analyzes the determinants of French regional bilateral exports and imports, according to a trade gravity model, for the period 2003–2010. The appreciation of the euro has a negative impact on exports and a positive effect on imports, confirming the fears of European politicians and managers in the aeronautic sector. The gravity equation, extended to integrate factor complementarities among partners, also shows that labor productivity levels in France and its partner countries are significant determinants of trade, supporting O-ring theory applied from Kremer (1993) to explicate trade in the aeronautical sector. The spatial organization of this sector is also analyzed via the impact of foreign military spending on French trade. Finally, by distinguishing French imports and arrivals of products manufactured in Europe and in France, supplementary estimations reveal that outward foreign direct investment FDI affects the imports and arrivals of European products negatively but has positive influences on the imports and arrivals of French products.     

The Eurozone Sovereign Debt Problem: What It Means for U.S. Exports

The European sovereign debt problem became the focus of world attention in 2010, when the interest rates on Greek government bonds rose dramatically, requiring immediate action by the European Union to avoid an imminent default. It has become clear that the problem is not limited to Greece, but a more general problem of the fundamental imbalances and underlying inconsistencies in the Eurozone economic system of using a single currency for a set of countries that lack a unified economic and political system. Financial markets reacted to the debt offering of the other deficit countries in the Eurozone by increasing interest rates on their sovereign debt as well. The major consequences are likely to be largely felt by the Eurozone countries themselves, some of whom will be forced to go through significant structural adjustments over the coming years. The adjustment process could generate a range of alternative macroeconomic outcomes for affected countries??including differences in growth, exchange rates, and investment??which could have significant implications for U.S. trade. This paper attempts to allay some of that uncertainty by exploring a wide range of alternative global macroeconomic outcomes and their potential impact on U.S. exports. The analysis extends the work done in a previous paper which focused on U.S. agricultural exports and its major components. While U.S. exports vary across the scenarios, continued strong economic growth in developing countries supports demand for U.S. exports. Because the EU has represented a declining share of U.S. exports, the direct impact of changes in European demand affects U.S. exports less than the secondary effects of changes in exchange rates and global investment patterns associated with alternative EU outcomes.     

On the impact of leverage constraints on asset prices and trading volume

Abstract. Researchers have used stylized facts on asset prices and trading volume in stock markets (in particular, the mean reversion of asset returns and the correlations between trading volume, price changes and price levels) to support theories where agents are not rational expected utility maximizers. This paper shows that this empirical evidence is in fact consistent with a standard infinite horizon – perfect information – expected utility economy where some agents face leverage constraints similar to those found in todays financial markets. In addition, and in sharp contrast to the theories above, we explain some qualitative differences that are observed in the price-volume relation on stock and on futures markets. We consider a continuous-time economy where agents maximize the integral of their discounted utility from consumption under both budget and leverage constraints. Building on the work by Vila and Zariphopoulou (1997), we find a closed form solution, up to a negative constant, for the equilibrium prices and demands in the region of the state space where the constraint is non-binding. We show that, at the equilibrium, stock holdings volatility as well as its ratio to stock price volatility are increasing functions of the stock price and interpret this finding in terms of the price-volume relation. We would like to thank the editor and two anonimous referees for valuable substantive comments. Our gratitude also to Franklin Allen, Kerry Back, Domenico Cuoco, Xavier Freixas, Sanford Grossman, Michel Habib, Lutz Hendricks, Richard Kihlstrom, Fernando Restoy, Mary Thomson, Jean-Luc Vila, participants to seminars at Birkbeck College, Carnegie-Mellon, Columbia, ESSEC, HEC, IAE, INSEAD, London Business School, London School of Economics, McGill, Michigan, National University of Singapore, Pompeu Fabra, North Carolina, Washington-St-Louis, Wharton, the Jornadas de Economía Financiera BBV, and the Meetings of the Society for Economic Dynamics and Control and the American Finance Association. Special thanks are due to Süleyman Basak for his enthusiastic support and many helpful suggestions. The usual disclaimer applies. We gratefully acknowledge the support of the BBV and Caja de Madrid Foundations and CREF (both authors) and of the Spanish Ministry of Education under DGICYT grant no. PB93-0388 (first author).     

Expectations in micro data: rationality revisited

An increasing number of longitudinal data sets collect expectations information regarding a variety of future individual level events and decisions, providing researchers with the opportunity to explore expectations over micro variables in detail. We present a theoretical framework and an econometric methodology to use that type of information to test the Rational Expectations (RE) hypothesis in models of individual behavior. This RE assumption at the micro level underlies a majority of the research in applied fields in economics, and it is the common foundation of most work in dynamic models of individual behavior. We present tests of three different types of expectations using two different panel data sets that represent two very different populations. In all three cases we cannot reject the RE hypothesis. Our results support a wide variety of models in economics, and other disciplines, that assume rational behavior. We would like to acknowledge outstanding research assistance from Huan Ni. The Michigan Retirement Research Center (MRRC) and the TIAA-CREF Institute made this research possible through their financial support of two related projects. Benítez-Silva also acknowledges the financial support from NIH grant AG1298502 on a related project, and also from the Fundación BBVA, and the Spanish Ministry of Science and Technology through project number SEJ2005-08783-C04-01, and wants to thank the Department of Economics at the University of Maryland and the Department of Economics at Universitat Pompeu Fabra for their hospitality during the completion of this paper. Three anonymous referees provided excellent comments and suggestions. Any remaining errors are the authors’.     

Nonparametric estimation of convergence of interest rates: Effects on bond pricing

We present and estimate a model of short term interest rate dynamics where we incorporate the convergent behavior of interest rates implied by the transition to EMU. We apply this model to data of two EMU countries - Spain and Italy - and compare the performance, in terms of accuracy of bond pricing, of this two-factor convergence model with alternative specifications. Nonparametric techniques are used for the estimation of the processes. The two-factor model which accounts for the convergence with Europe of the domestic economies, obtains better results, especially for short-term assets, than alternative models. The results of the nonparametric specifications are shown to be significantly better than those of parametric alternatives.JEL Classification: E43, C14We would like to thank Adrian Pagan and Eduardo Schwartz for their invaluable feedback, encouragement and patience. We also would like to thank the editor, two anonymous referees and participants at the Symposium of Economic Analysis (Barcelona, December 1999), the Australasian Meeting of the Econometric Society (Sydney, July 1999), the 2000 European Meeting of the Financial Management Association (Edinburgh, July 2000) and seminars at the Australian National University, Canberra, and at the University of New South Wales, Sydney, for their comments and suggestions. All errors remain our sole responsibility. Financial assistance from the Fundación Ramó n Areces, Madrid, Spain, and the Asociación de Amigos de la Universidad de Navarra, Pamplona, Spain, is gratefully acknowledged.     

The trade effects of Albania’s trade agreements with CEFTA members

Since the Central European Free Trade Agreement (CEFTA) was signed in 2006, Albanian exports to CEFTA member countries have increased four-fold. Applying a trade growth decomposition methodology, we show that Albanian firms that did not export to CEFTA countries before the agreement account for a large share of this export growth. Exports also increased among goods that were the least traded before the agreement. Estimating a gravity equation, we find that the CEFTA increased Albanian exports between 34% and 144%, depending on how the previous bilateral agreements with CEFTA countries are accounted for. Additional regression analyses conclude that the CEFTA fostered exports through the reduction of tariffs.