Optimal R&D investment for a risk-averse entrepreneur

Entrepreneurs investing in R&D projects face technical uncertainty associated with the cost to completion of the project, which is idiosyncratic and inherently unhedgeable. We extend existing real options models of R&D investment to incorporate the cost of bearing this unhedgeable risk and find it decreases risk-averse entrepreneurs’ valuations of R&D projects and increases the minimum NPVs required for continued investment in R&D (threshold NPVs) relative to ‘unpriced risk’ values and threshold NPVs. As in the ‘unpriced risk’ case, for less risk-averse entrepreneurs with small R&D projects, threshold NPVs remain negative and decrease with technical uncertainty. However, for sufficiently risk-averse entrepreneurs with sufficiently large R&D projects, threshold NPVs can become positive and increase with technical uncertainty.     

An Asymptotic Analysis of an Optimal Hedging Model for Option Pricing with Transaction Costs

Davis, Panas, and Zariphopoulou (1993) and Hodges and Neuberger (1989) have presented a very appealing model for pricing European options in the presence of rehedging transaction costs. In their papers the 'maximization of utility' leads to a hedging strategy and an option value. The latter is different from the Black–Scholes fair value and is given by the solution of a three–dimensional free boundary problem. This problem is computationally very time–consuming. In this paper we analyze this problem in the realistic case of small transaction costs, applying simple ideas of asymptotic analysis. The problem is then reduced to an inhomogeneous diffusion equation in only two independent variables, the asset price and time. The advantages of this approach are to increase the speed at which the optimal hedging strategy is calculated and to add insight generally. Indeed, we find a very simple analytical expression for the hedging strategy involving the option's gamma.     

The impacts of Renminbi appreciation on trade flows and reserve accumulation in a monetary trade model

Given the rapidly growing reserves in Asia (China, Japan, Korea, and Taiwan) and the pressures from trading partners to revalue, there is a need to examine commercial policy in more than a pure barter model. Here we evaluate the joint impacts of exchange rate appreciation on trade flows and country surpluses using a general equilibrium trade model with a simple monetary structure in which the trade surplus is endogenously determined in the exchange rate setting country and the exchange rate is exogenous. We illustrate its application to the Chinese case using calibration to 2005 data. Our results, while elasticity dependent, suggest that the impacts of Renminbi (RMB) revaluation on the surplus are proportionally larger than on trade flows, and that changes in trade flows can be substantial. Different treatments of China's processing trade have small impact on changes in China's trade flow under RMB appreciation, but significant impacts on the change in the surplus. Results are elasticity dependent; larger substitution elasticities in preferences yield larger effects on trade flows and the surplus.     

The Choice of Structural Model in Trade–Wages Decompositions

This paper uses a calibrated general equilibrium model to decompose observed wage changes from trade and technology shocks into portions attributable to each source. It highlights some difficulties with the numerical performance of widely used theoretical trade structures. For small economies, the Heckscher–Ohlin model reveals specialization problems unless the price changes accompanying trade shocks are small. It can also yield strikingly different decompositions of the same wage change. A differentiated-goods model removes specialization problems and accommodates large price changes, but introduces demand-side responses greatly reducing the effect of trade on wages, and performs implausibly with sector-biased technical change.     

The new regionalism: trade liberalization or insurance?

Several of the recently negotiated regional trade agreements contain significantly fewer concessions by the large countries to smaller countries than vice versa. In this paper, we compute post‐retaliation Nash tariffs by region under various regional trade arrangements using a calibrated numerical general equilibrium model of world trade. Regional agreements constrain strategic behaviour within each trading area, and (in the Customs Union case) enhance it outside the bloc. Results confirm the intuition that without side payments large‐small country regional agreements (such as the Canada‐U.S. agreement) would not have occurred. Le nouveau régionalisme: libéralisation du commerce ou assurance? Dans plusieurs des accords de libre échange régionaux négociés récemment, les grands pays accordent beaucoup moins de concessions aux petits pays que les petits aux grands. Dans cet article, les auteurs mesurent, à l'aide d'un modèle numérisé d'´equilibre général du commerce mondial, les droits de douane à la Nash après ajustements réciproques. Il semble que les accords régionaux contraignent les comportements stratégiques dans chaque bloc, et (dans le cas de l'union douanière) renforcent les comportements stratégiques hors du bloc. Ces résultats confirment l'intuition qui suggère que, sans ces arrangements parallèles, les accords entre grands et petits pays (comme l'accord U.S.A.‐Canada) ne se matérialiseraient pas.     

Measuring internationalisation in the mobile telecommunications industry

The telecommunications industry is often described as being a global industry. However, the fact that it exists throughout the globe does not necessarily imply that its constituent companies are individually global in their operations. So far, little interest has been expressed in determining whether they are or are not in practice, but to do so requires that one first determine how this is to be measured. This article focuses on the measurement of internationalisation within the mobile telecommunications industry where the phenomenon can be most clearly identified. Drawing on the literature, four dimensions of internationalisation are initially identified and a database is constructed for the year ending 31 December 2005 that provides hard evidence in relation to these dimensions.Analysis of the results reveals that just a handful of the companies in the sample can be considered to be meaningfully international when all four criteria are taken into account, and that Vodafone among them is best placed to describe itself as a global mobile operator although there are too many reservations for the term global to be seen as an appropriate label. The results highlight the complexity of internationalisation, with operators tending to do well on some of the criteria but not on others, and the paper illustrates how data availability influences the choice of criteria. Data availability also necessitates a trade-off between sample comprehensiveness and detail.     

How often are propositions on the effects of regional trade agreements theoretical curiosa?

This paper uses computational techniques to assess whether or not various propositions that have been advanced as plausible in the literature on regional trade agreements may actually hold. The idea is to make probabilistic statements as to whether propositions of interest might hold, rather than to restrict assumptions so they unambiguously hold. Our aim is to blend theory and numerical simulation and go beyond the ambiguous analytically derived propositions that dominate the theoretical literature so as to assess the likelihood of propositions holding for particular model specifications.     

The role of labour demand elasticities in tax incidence analysis with heterogeneous labour

Whether labour bears full burden of household level income and consumption taxes ultimately depends on the degree of substitutability among different types of labour in production. We find more variation in incidence patterns across households with less than perfectly substitutable heterogeneous labour than with perfectly substitutable homogeneous labour in production. This finding is based on results obtained from homogeneous and heterogeneous labour general equilibrium tax models calibrated to decile level income and consumption distribution data of UK households for the year 1994. We use labour supply elasticities implied by the substitution elasticity in households' utility functions and derive labour demand elasticities from the substitution elasticity in the production function. First version received: March 1998/Final version received: April 1999     

Carbon,Trade Policy and Carbon Free Trade Areas

This paper discusses both the potential contribution that trade policy initiatives can make towards the achievement of significant global carbon emissions reduction and the potential impacts of proposals now circulating for carbon reduction motivated geographical trade arrangements, including carbon‐free trade areas. We first suggest that trade policy is likely to be a relatively minor consideration in climate change containment. The dominant influence on carbon emissions globally for the next several decades will be growth more than trade and its composition, and in turn, the size of trade seemingly matters more than its composition given differences in emission intensity between tradables and non‐tradables. We then note that differences in emissions intensity across countries are larger than across products or sectors and so issues of country discrimination in trade policy (and violations of MFN) arise. We next discuss both unilateral and regional carbon motivated trade policy arrangements, including three potential variants of carbon emission reduction based free trade area arrangements. One is regional trade agreements with varying types of trade preferences towards low carbon‐intensive products, low carbon new technologies and inputs to low carbon processes. A second is the use of joint border measures against third parties to counteract anti‐competitive effects from groups of countries taking on deeper emission reduction commitments. A third is third‐country trade barriers along with free trade or other regional trade agreements as penalty mechanisms to pressure other countries to join emission‐reducing environmental agreements. We differentiate among the objectives, forms and possible impacts of each variant. We also speculate as to how the world trading system may evolve in the next few decades as trade policy potentially becomes increasingly dominated by environmental concerns. We suggest that the future evolution of the trading system will likely be with environmentally motivated arrangements acting as an overlay on prevailing trade and financial arrangements in the WTO and IMF, and eventually movement to linked global trade and environmental policy bargaining.     

Trade and Environment: Bargaining Outcomes from Linked Negotiations

Some recent literature has explored physical and policy linkages between trade and the environment. This paper explores linkage through leverage in bargaining, whereby developed countries can use trade threats to achieve improved developing-country environmental management, while developing countries can use environmental concessions to achieve trade discipline in developed countries. A global numerical simulation model is used to compute bargaining outcomes from linked trade and environment negotiations. Results indicate joint gains from expanding the trade bargaining set to include the environment. However, compared with bargaining with cash side-payments, linked negotiations on policy instruments provide significantly inferior outcomes for developing countries.