international trade as an integrated equilibrium new perspectives the integrated equilibrium is a paradigm that has played a central role in the field of international trade the concept originated with paul a samuelson 1949 was further developed by avinash k dixit and victor f norman 1980 and placed at the heart of international analysis by elhanan helpman and paul r krugman 1985 the central idea is that a world with imperfect mobility of productive factors across regions or countries may replicate the essential equilibrium of a fully integrated economy provided that goods are perfectly mobile the concept of the integrated equilibrium has proved to be exceptionally tractable and useful for analytic developments as for example in the work of gene m grossman and helpman 1992 we have found using elements of integrated equilibrium analysis useful in our own work e g davis et al 1997 the central figures in developing the theory of trade and growth within the integrated equilibrium framework have been quite aware of its limitations helpman and krugman 1985 include a section on the cases in which factor price equalization fpe breaks down grossman and helpman 1992 make the distinction between national and international spillovers a key element of their theory of trade and growth moreover the starting point of krugman s work in the past decade on economic geography has been precisely to deny that the world operates as if it were an integrated economy this notwithstanding we believe that the grip of integrated equilibrium analysis on the way that the economics profession conceives of world trade patterns remains very powerful and in important ways distorts one s view of trade relations particularly among the relatively rich countries of the oecd we do not propose to banish integrated equilibrium analysis we believe that it is useful in the proper context however we do propose that it is important to have a fuller appreciation of the limits of such analysis from an empirical standpoint and thus to have a richer view of the determinants of world trade patterns

the direction of developing country trade empirical evidence of differences between south south and south north trade abstract declining market opportunities in northern markets led to views that greater south south trading might provide an alternative growth stimulus this paper analyses the characteristics of south south trade in manufactures and recent changes in the level of such trade to help clarify the potential of greater self reliance within the south south south trade is found to be more intensive in the use of both physical and human capital hence less rational from the static comparative advantage viewpoint than south north trade there is indirect but strong evidence that exporting countries with greatest orientation towards the south are those with greater distortions less rapid movements up the ladder of comparative advantage and weaker export performance finally it is observed that the recent boom in south south trade is largely explained by simple market size effects very rapid growth of rich oil exporters and the faster gnp growth of developing compared to developed countries the paper concludes that while south south trade of about the present magnitude one of greater developing country exports is certainly rational there is little evidence to support views that greater south south trade should be especially promoted arguments of dynamic comparative advantage may favor south south trade but so far these have been more speculative and not yet well researched empirically

skills and changing comparative advantage using u s input output data for the period 1947 1996 and dictionary of occupational titles skill scores i find that u s exports have a high content in cognitive and interactive skills relative t

sources of changes in factor intensity of trade the factor proportions hypothesis of trade theory has been the subject of a large number of empirical tests but few of them have analyzed the changes in the factor content of trade in a country over time or across countries this study analyzes the changes in factor intensity of trade in mexico japan korea taiwan and israel during the 1960s it traces back the changes in capital labor ratios in the production of exports and import substitutes to variations in the sectoral composition of trade changes in factor output ratios and changes in input output coefficients

the relationship between factor endowments and commodity trade abstract the paper establishes general propositions concerning the relationship between a nation s factor endowments and its pattern of commodity trade in a multi factor multi product context inequality relationships between endowments and autarky prices autarky and free trade prices and between autarky prices and free trade net exports are established using a general model of trade attention is then restricted to a multi product multi factor version of the heckscher ohlin samuelson model of trade from an initial autarky equilibrium a comparative statics analysis yields the effect on net exports of a change in one nation s endowment a bilinear inequality between the changes in endowments and net exports is established it is also shown that if a good were to be exported imported when endowments changed and world prices were held fixed then it will continue to be exported imported when world prices have adjusted to re establish free trade equilibrium

take or pay contract robustness a three step story told by the brazil bolivia gas case abstract neo institutional economics nei has long shown that take or pay top long term contracts provide a robust framework for safeguarding the interests of both upstream and downstream parties in the gas industry the case of gas trade between brazil and bolivia presents an opportunity to re examine empirically and to review the robust nature of the top framework over time this case reveals that the positions of the contractors actually change giving rise to a veritable lifecycle of the contractual arrangement such a contract can be seen to span three successive phases the first phase of the contract cycle begins when it is signed allowing the investments to begin the second phase starts when investments have been completed and the actual trade in gas begins the third phase of the contract cycle comes when the increasing flow of gas comes close to saturating capacity and the volume levels for downstream market volume have been reached these three contract phases are thus distinguished by how robust the alignment of the parties interests is the added value of the paper is then both empirical and analytical the case study provides a brand new lifecycle analysis of the performance of top long term contracting into an nei framework

european market integration for gas volume flexibility and political risk this is a copy of an article originally published by elsevier in energy economics see http www sciencedirect com science journal 03014215 2002 elsevier science b v

what determines patent value insights from the semiconductor industry abstract this paper contributes to an understanding which impacts certain patent characteristics have on the value of patent rights in an exploratory study 127 individual patents from a semiconductor company were evaluated comprehensively by technical and marketing representatives the analysis of this rare data shows that for patents used as bargaining chips novelty and inventive activity are most important difficulty of inventing around and disclosure turn out to be of limited importance due to a selection bias the influence of patent age on its value cannot be determined the results hint at a differentiated theoretical plausibility of value indicators

external economies and trade an empirical analysis in recent international trade literature external economies are taking center stage as a determinant of comparative advantage in manufacturing industries several recent trade models have focused on learning or human capital development as the primary source of external economies a young develops a model of dynamic comparative advantage with external economies at the industry level based on learning curves r e lucas and n l stokey both focus on external effects of human capital accumulation at the societal level as an engine of growth and examine the trade and development implications 2 conducting empirical studies on models involving external effects of human capital poses the challenge of how to quantify such effects lucas suggests that the solution to this problem may be found by examining the urbanization economies inherent in cities 3 lucas is not alone in drawing a parallel between urban rural trade and international trade p r krugman exhorts trade economists to study local and regional trade as a guide to international specialization 4 like lucas krugman points to the possibilities of solving data problems if we want to understand international specialization a good place to start is with local specialization the data will be better and pose fewer problems of compatibility and the underlying economic forces will be less distorted by government policies 5 this study tests the ability of urban production data to explain international trade between the united states and developing countries a factor proportions model with external economies is used to explain trade patterns i use u s urban production data to measure the effect of differences in endowments of the factors generating external economies the model performs well the interesting result is the strength of the external factors as measured by the urban production variable in explaining international trade this result supports lucas s

taste change in the united kingdom 1900 1955 a search is made for violations of the axiom of revealed preference in aggregate consumption data for the united kingdom no such violations are found this is taken as evidence that tastes remained constant throughout the period under study the strength of this evidence is estimated within the context of a particular model of taste change

a test of the factor endowments model of trade in a rapidly industrializing country the case of the authors perform a fully specified test of the heckscher ohlin vanek hov multifactor content theorem of international trade in the context of a rapidly industrializing economy the republic of korea in 1970 and 1980 the test involves a comparison of independent measures of relative factor endowments with endowment rankings revealed by korea s international trade and total factor intensities interest arises in this effort because korea s industrialization presents a new set of circumstances in which to test the heckscher ohlin vanek theorem the results strongly suggest that the revealed factor endowments departed significantly from actual factor supplies the authors discuss potential reasons for this divergence copyright 1993 by mit press

testing the heckscher ohlin vanek theory with a natural experiment i use the historical episode of near elimination of commuting from the west bank into israel to test three key predictions of the heckscherohlinvanek model of trade and find strong support for them on the production side i use variation between districts and find that wage changes were not correlated with the size of the shock to the labour force factor price insensitivity and that districts that received larger influx of returning commuters shifted production more towards labour intensive industries rybczynski effect on the consumption side data are consistent with identical homothetic preferences which combined with the production results supports the heckscherohlinvanek theorem on the factor content of trade

trade policy preferences and factor abundance abstract this paper provides a theoretical and empirical analysis of public opinion towards free trade investigating cleavages both between and within countries we study the distributional effects of trade policy in a neoclassical heckscher ohlin economy with not just two but many input factors in production we demonstrate that the factor price changes induced by trade policy are negatively associated with the factor content of free trade and therefore factor abundance using large scale international survey data we test whether these predicted distributional effects are reflected in the trade policy preferences of workers with different labor market skills in order to isolate the effects of factor abundance from other skill related confounding factors we employ a within skill group estimator that exploits the cross country variation in factor abundance in line with theory the data show that individuals whose skills are in more abundant domestic supply have significantly more positive attitudes towards trade

refuting two claims about virtual water trade abstract using the heckscher ohlin trade model i refute two prominent but incorrect claims on virtual water trade these claims are that virtual water trade i levels uneven water distribution and ii reduces the potential for water conflict both claims are based on an incorrect understanding of comparative advantage in the production of water intensive goods the results show that both claims only hold under certain conditions but do not necessarily follow from the heckscher ohlin trade model

patent protection in the shadow of infringement simulation estimations of patent value empirical estimates of the private value of patent protection are derived for four technology areas computers textiles combustion engines and pharmaceuticals using new patent data for west germany 1953 1988 patentees must pay renewal fees to keep their patents in force as well as legal expenses in order to enforce them a dynamic stochastic discrete choice model of optimal renewal decisions is developed incorporating both learning and depreciation as well as the potential need to prosecute infringement the evolution of the distribution of returns over the life of a group of patents is calculated for each technology using a minimum distance simulation estimator results indicate that the aggregate value of protection generated per year is on the order of 10 of related r d expenditure

gas market distorting effects of imbalanced gas balancing rules inefficient regulation of pipeline flexibility this paper analyzes the value and cost of line pack flexibility in liberalized gas markets through examination of the techno economic characteristics of gas transport pipelines and the trade offs between different ways to use the infrastructure transport and flexibility line pack flexibility is becoming increasingly important as a tool to balance gas supply and demand over different periods in the european liberalized market context a monopolist unbundled network operator offers regulated transport services and flexibility balancing services according to the network code and balancing rules therefore gas policy makers should understand the role and consequences of line pack regulation the analysis shows that the line pack flexibility service has an important economic value for the shippers and the tso furthermore the analysis identifies distorting effects in the gas market due to inadequate regulation of line pack flexibility by disregarding the sunk costs of flexibility in the balancing rules the overall efficiency of the gas system is decreased finally the analysis demonstrates that the actual costs of line pack flexibility are related to the peak cumulative imbalance throughout the balancing period any price for pipeline flexibility should therefore be based on the related trade off between the right to use the line pack flexibility and the provision of transport services

multiple cones factor price differences and the factor content of trade abstract this paper examines the theoretical predictions of the multi cone heckscher ohlin model and the empirical evidence for it i extend helpman 1984 by identifying additional restrictions that characterize the free trade equilibrium i illustrate that the complete set of restrictions are the building blocks of a multi cone factor content specification which is the factor content dual to alan deardorff s 1979 well known chain of comparative advantage goods prediction the theoretical analysis implies that the existing tests of helpman are incomplete applying the complete set of restrictions to choi and krishna s data set of 8 oecd countries i find limited empirical support this is compatible with previous studies suggesting that oecd countries do not occupy different cones

deliverability and regional pricing in u s natural gas markets during the 1980s and early 90s interstate natural gas markets in the united states made a transition away from the regulation that characterized the previous three decades with abundant supplies and plentiful pipeline capacity a new order emerged in which freer markets and arbitrage closely linked natural gas price movements throughout the country after the mid 1990s however u s natural gas markets tightened and some pipelines were pushed to capacity we look for the pricing effects of limited arbitrage through causality testing between prices at nodes on the u s natural gas transportation system and interchange prices at regional nodes on north american electricity grids our tests do reveal limited arbitrage which is indicative of bottlenecks in the u s natural gas pipeline system

factor trade and goods trade world equilibria with trade in both goods and some factors are studied when international factor endowment differences are the cause of trade a generalized heckscher ohlin theorem is presented the goods trade patterns with and without factor trade are compared factor trade and goods trade tend to be substitutes complements if traded and non traded factors are cooperative non cooperative

high tech and productivity evidence from israeli industrial firms abstract the main purpose of this study is to characterize and analyze high technology industrial firms a technology index is constructed and used to classify firms the largest concentration of hightech firms is israel is found in electronics and transport equipment industries and the lowest in textiles and clothing high tech firms appear to be more productive more export oriented pay higher wages and earn higher rates of return than low tech firms the fact that high tech firms in israel are export oriented is shown to be consistent with the international trade theories of comparative advantage and strategic rent seeking

measurement of the factor content of foreign trade with traded intermediate goods abstract in a recent article helpman 1984 develops readily testable bilateral restrictions in a model of international trade which preserves the spirit of heckscher ohlin trade theory important in any empirical exploration of the heckscher ohlin model is the decision of whether to employ direct or direct plus indirect calculations in determining the factor content of trade this paper extends helpman s analysis to a world of freely traded intermediate goods and shows that direct factor content calculations are the theoretically appropriate measure for use in evaluating these empirical implications of the heckscher ohlin model

new products and the factor content of international trade this paper extends the multicommodity two input version of the heckscher ohlin model to include new products on which considerable interest has been focused by the product cycle hypothesis and related analyses the extended model is then used to reexamine the implications of relative factor abundance for the capital and labor content of international commodity trade as this analysis shows the presence of new products might in principle resolve the leontief paradox under certain specific conditions

technology policy for a world of skew distributed outcomes abstract this paper draws implications for technology policy from evidence on the size distribution of returns from eight sets of data on inventions and innovations attributable to private sector firms and universities the distributions are all highly skew the top 10 of sample members captured from 48 to 93 percent of total sample returns it follows that programs seeking to advance technology should not be judged negatively if they lead to numerous economic failures rather emphasis should be placed on the relatively few big successes to achieve noteworthy success with appreciable confidence a sizeable array of projects must often be supported the outcome distributions are sufficiently skewed that even with large numbers of projects it is not possible to diversify away substantial residual variability through portfolio strategies

improving patent valuations for management purposes validating new indicators by analyzing application rationales abstract this paper analyzes the validity of so far untested indicators of patent value to enhance the quality of patent assessments using indicators at the corporate level the article expands the theory by eliciting patent attorneys filing rationales to maximize profits from protecting intellectual property to inspire the computation of new value indicators including patent full texts then based on a newly compiled data set consisting of 813 ep patents the probability of an opposition against a patent is modeled by established and new value indicators the results show that accelerated examination requests and qualified word counts enhance the quality of existing valuation methods

comparative advantage in manufactured goods a re appraisal japanese input coefficients are used to investigate the pattern of comparative advantage in the exportation of manufactured products in a cross country framework estimates are made for the imports of manufactured products as well as for net exports also alternative techniques of estimation are utilized and an attempt to explain the residuals in the regression equations and to indicate the predictive power of these equations is made the paper shows that patterns of comparative advantage in manufactured goods can be explained by reference to commodity characteristics and country characteristics in turn intercountry differences in the extent of trade orientation the concentration of exports and foreign direct investment explain part of the residuals of the cross country regression equations finally it has been found that the method applied permits projecting the factor intensity of trade for individual countries

natural gas corridors between the eu and its main suppliers simulation results with the dynamic gastale model abstract growth in gas demand poses a challenge for european energy consumers and other gas importing countries in terms of an increasing dependency on gas imports and consequently also supply security this paper focuses on interactions among demand supply and investments in natural gas corridors namely pipeline transport lng and storage facilities affecting the european natural gas market over the period 2005 2030 a number of policy scenarios including a business as usual bau scenario are formulated to study the impact of demand uncertainty and delays in investment on the gas transport infrastructure required in the long run in europe the analyses indicate that substantial investments in gas transport corridors are needed to accommodate imports and seasonal demand variations analysis of scenarios of supply interruption in the form of suddenly reduced import capacity for particular pipeline routes indicates that portions of europe could experience price increases of up to 100 in the case of a year long interruption to accommodate import needs and to mitigate possible disruptions pipeline connections running from east to west need to be given special priority

labour skills and the uk s comparative advantage with its european union partners this paper assesses the extent and sources of the uk comparative advantage within the european union eu it finds that both inter industry and intra industry trade are important despite clear aggregation effects having established that there is a significant degree of inter industry specialization the sources of this are analysed using a factor content approach results are reported for aggregate factors of production and in the case of labour by disaggregated skill categories a key finding is that the uk s net trade with the eu is driven more by a specialization in specific types of skill than by an overall endowment of human capital the results also suggest that the inter industry specialization cannot be explained by comparative advantage alone

valuing exploration and production projects by means of option pricing theory abstract this paper provides a general introduction to the valuation of investment projects with option pricing theory opt furthermore a specific application of opt to value exploration and production projects in the petroleum industry is shown to model the various nested options of such investments the discrete approach of the binomial model is preferred to the continuous model by black and scholes furthermore two kinds of binomial trees are used one tree represents the pre drilling period and the other represents the production phase of the reservoir due to the use of a multiplicative binomial process for the oil price trend unrealistic prices may occur to exclude them from the calculation an oil price band is introduced additionally uncertainty of all input parameters not only of the oil price is considered this is achieved by combining opt with the monte carlo simulation

the importance of assumptions in investment evaluation abstract this work illustrates a new method for estimating the importance of assumptions in investment evaluation the most diffused sensitivity analysis schemes present limitations when used to assess the importance of individual parameters and cannot be employed to estimate the importance of groups of assumptions however such problems can be solved by making use of the differential importance measure dim we set forth the framework for the application of dim at the parameter level of investment valuation models we study the relationship between dim and investment marginal behavior we analyze the link between importance of a parameter and risk associated with it we discuss general results for a sample valuation model the numerical application to the valuation of an energy sector investment project follows we rank the factors based on their importance and determine the project risk profile we discuss the importance of groups of assumptions results will show that assumptions relating to revenues are the most influential ones followed by discounting and operating cost assumptions we discuss numerically the relationship between importance and risk analyzing the effect of variable costs hedging through the comparison of the project risk profile in the presence and in the absence of such a hedging

why does hov fail the role of technological differences within the ec abstract this paper examines the role of international differences in production techniques in explaining the empirical failure of the heckscher ohlin vanek hov model it develops a modified hov model that relaxes the assumption of identical production techniques across countries and can be estimated using input output data of individual countries the contribution of international differences in techniques to net factor trade patterns is then isolated by comparing the performance of the strict and modified hov models the paper finds that allowing for international technique differences significantly improves the predictive power of the hov model

firless firwoes how preferences can interfere with the theorems of international trade abstract an example is presented of a two country two factor four good trade model in which free trade causes factor prices to be drawn farther apart than they were in autarky the example is equivalent to a two good model with a double factor intensity reversal fir and thus demonstrates that the problems associated with firs can arise in many dimensions without them these problems include the undermining of other trade theorems as well and can be avoided only by making some assumption about demand as well as about technology for example the model becomes well behaved if preferences and technology are both cobb douglas

valuing patents on cost reducing technology a case study we present an approach for valuing patents on production process improvements specifically we focus on valuing a patent on cost reducing process improvements from the viewpoint of the patent holding firm we do this by considering the relevant cash flows that result from owning the patent the patent value is determined by 1 licensing fees and royalty income 2 competitive advantage resulting from the patent 3 patent maintenance costs we discuss a case study that presents the difficulties and challenges in finding the relevant information that is needed to estimate the cash flows we show that valuation of patents on production process improvements cannot be done without good knowledge of technology markets and competitors

the commodity pattern of trade and the heckscher ohlin theorem in the presence of aggregate and commodity specific factor intensity reversals abstract theoretical analyses of the h o theorem s prediction of the commodity pattern of trade in the multicommodity two factor model tend to assume away factor intensity reversals but the empirical literature has investigated whether reversals between individual goods technologies are prevalent phenomena with the evidence then being presented as bearing upon the h o theorem since the consequence of a factor intensity reversal for the theorem is well defined in the 2 2 2 model we establish via aggregation over individual goods technologies an analogue 2 2 2 setting for the multicommodity model the implications of factor intensity reversals in commodity specific technologies for the reversal behavior of the aggregate technologies and for the h o theorem are examined commodity specific reversals such as are the focus of the empirical studies are shown to have no direct bearing upon the theorem

the patent paradox revisited an empirical study of patenting in the u s semiconductor industry 1979 1995 we examine the patenting behavior of firms in an industry characterized by rapid technological change and cumulative innovation recent survey evidence suggests that semiconductor firms do not rely heavily on patents to appropriate returns to r d yet the propensity of semiconductor firms to patent has risen dramatically since the mid1980s we explore this apparent paradox by conducting interviews with industry representatives and analyzing the patenting behavior of 95 u s semiconductor firms during 1979 1995 the results suggest that the 1980s strengthening of u s patent rights spawned patent portfolio races among capital intensive firms but it also facilitated entry by specialized design firms

the general validity of the heckscher ohlin theorem despite a number of attempts to extend it the heckscher ohlin theorem remains woefully restricted in terms of the generality of the assumptions needed for its proof in its traditional form as a statement about the commodity composition of trade the theorem is valid only in the highly abstract environment of the two factor two good twocountry model that has been the mainstay of trade theory for half a century a weaker version of the theorem involving the factor content of trade rather than its commodity composition has been proved for any number of factors goods and countries but this generality has so far been bought only at the cost of other and perhaps equally restrictive assumptions 2 the purpose of this paper is to provide statements and proofs of the heckscher ohlin h o theorem that are more general than those currently available the approach taken is similar to that used in my 1980 article for an extension of the theory of comparative advantage in terms of correlations between autarky prices and trade in section i i lay out the assumptions on which the analysis is based these assumptions provide the outlines of a reasonably general model in which there may be any numbers of goods and factors and in which factor prices may be equalized or not trade impediments in the form of tariffs or export taxes are permitted though transportation costs are not 3 in section ii i discuss the difficulty of inferring the factor content of trade in a world of unequal factor prices and i provide several alternative definitions of that concept for use later in the paper these together with the assumptions of section i are used in section iii to prove a theorem on the value at autarky prices of the factor content of trade in section iv this theorem is used to prove a first corollary that makes a more direct statement about the pattern of trade it says that worldwide there must be a negative correlation between the factor content of trade by factor and country and the corresponding autarky factor prices it is precisely these autarky factor prices that constitute the ohlin measure of factor scarcity therefore the corollary provides a formal statement of the general idea that countries tend to export the services of those factors which they have in relative abundance and it may be regarded as a generalization of the factor content version of the h o theorem finally a generalization of the commodity version of the theorem is proved in section v the concept of a covariance is generalized university of michigan i have benefitted greatly from the comments of paul degrauwe wolfgang mayer michael mussa carl simon and robert stern as well as others who participated in seminars at the universities of michigan chicago and cincinnati and at the national bureau of economic research an anonymous referee also made valuable comments with additional goods and factor price equalization the theorem runs afoul of the indeterminacy of production and trade noted by paul samuelson 1953 and james melvin 1968 without factor price equalization trade impediments and intermediate production can cause reversals of the pattern of trade as shown in my 1979 article if additional factors and countries are also added it becomes difficult even to state the theorem let alone to prove it 2melvin stated such a theorem for the three good two factor case and jaroslav vanek 1968 proved it for the general case but only by assuming factor price equalization trent bertrand 1972 and jon harkness 1979 were able to drop the factor price equalization assumption but replaced it with restrictions on consumption of either goods or factors by country of origin it is unclear to me however that these restrictions can ever be met in a model that is otherwise plausible harkness 1978 has also used the factor content version of the theorems as the motivation for a regression equation relating commodity trade to factor intensities this bears some resemblance to my analysis below in section v see however james anderson 1981 and edward leamer and harry bowen 1981 who have criticized his result with a reply by harkness 1981 3for ease of exposition i do not allow here for transportation costs these were included in an earlier version of this paper following the technique in my 1980 article

a test of the heckscher ohlin vanek theorem the leontief commonplace abstract this paper provides a logically complete empirical test of the hov theorem for the united states by comparing measures of factor intensities trade and factor endowments under the appropriate computations of the factor contents of trade and production u s data are shown to diverge often from their values as predicted by hov as a result it appears that paradoxical outcomes may be common in empirical applications of the theorem

an evaluation of factor endowments and protection as determinants of japanese and american foreign trade we consider the relationship between the factor content of japanese and american foreign trade and examine empirically whether discrepancies between the heckscher ohlin theoretical predictions and the observed patterns of trade can be attributed to protection the michigan model of world production and trade is used for computational purposes we find some evidence of discrepancies between predicted and observed trade patterns but removal of protection either worsens these discrepancies or reduces them by only a small amount some possible reasons for the empirical shortcomings of the heckscher ohlin theory are offered in conclusion

an interpretation of the factor content of trade abstract this paper shows that the factor content of trade can be used to indicate effects of trade on relative factor prices factor prices in two trading equilibria can be compared by comparing instead their two equivalent autarky equilibria constructed by changing factor endowments by the factor content of trade using relationships between autarky factor prices and factor endowments several relationships are derived between factor prices with trade and its factor content the most general result is a positive correlation between relative changes in the factor content of trade appropriately normalized and proportional changes in factor prices

welfare reducing licensing abstract in this paper we characterize situations where licensing a cost reducing innovation to a rival firm using two part tariff contracts a fixed fee plus a linear per unit of output royalty reduces social welfare we show that it occurs if i the firms compete in prices ii the innovation is large enough but not drastic and iii the goods are close enough substitutes moreover we show that regardless of the type of competition first the optimal contract always includes a positive royalty and second even drastic innovations are licensed whenever the goods are not homogeneous

patents as options some estimates of the value of holding european patent stocks in many countries holders of patents must pay an annual renewal fee in order to keep their patents in force this paper uses data on the proportion of patents renewed and the renewal fees faced by post world war ii cohorts of patents in france the united kingdom and germany in conjunction with a model of patent holders renewal decisions to estimate the returns earned from holding patents in these countries since patents are often applied for at a nearly stage in the innovation process the model allows agents to be uncertain about the sequence of returns that will be earned if the patent is kept inforce formally then the paper presents and solves a discrete choice optimal stochastic control model derives the implications of the model on aggregate behaviour and then estimates the parameters of the model from aggregate data the estimates enable a detailed description of the evolution of the distribution of returns earned from holding patents over their life spans and calculations of both the annual returns earned from holding the patents still in force or the patent stocks in the alternative countries and the distribution of the discounted value of returns earned from holding the patents in a cohort this abstract was borrowed from another version of this item

forum shopping for ex post gas balancing services the patchwork of different imbalance settlement rules in geographically adjacent gas regions induces shippers to go forum shopping to minimize costs of ex post balancing services this shopping increases efficiency and thus welfare of the shippers on the one hand the impact on net efficiency is dependent on the relative incentives provided by different balancing mechanisms and the relative system balancing costs that the transmission system operators face to offer balancing services to unbalanced shippers on the other hand if the gas balancing mechanism and the system balancing costs are aligned net efficiency in the combined gas system will rise our results demonstrate that such an outcome is not guaranteed hence market integration without properly checking compatibility of balancing rules can improve shipper efficiency at the cost of reducing overall efficiency the latter outcome should clearly be avoided by policy makers and european regulators whose primary concern should be overall efficiency as this provides fair and efficient prices for gas consumers and a higher utility for society

factor content functions and the theory of international trade this paper introduces the concepts of direct and indirect factor trade utility functions and uses them to derive marshallian and hicksian factor content functions which express the quantities of factors of production embodied in net imports as functions of the exogenous variables facing the economy the properties of these functions are discussed and they are used to derive a number of new results in particular it is shown that in certain circumstances the existence of gains from trade is sufficient for the heckscher ohlin theorem to hold in its factor content form

two by two international trade theory with many goods and factors this paper adopts a new approach to the problem of generalizing the properties of the two by two heckscher ohlin model asking whether we can obtain results which hold in very general models for dichotomous categories of commodities and factors using duality theory some results of this kind are derived which generalize certain properties of the heckscher ohlin model to models which allow for any number of goods and factors joint production international factor mobility and substitution between primary factors and intermediate inputs the consequences of assuming sector specific factors and equal numbers of goods and factors are also examined

open access and the evolution of the u s spot market for natural gas federal regulations promoting open access transportation dramatically altered the organizational structure of the u s market for natural gas in the 1980s generally unbundling the merchant and transport functions of interstate pipelines an empirical analysis of wellhead spot prices is undertaken to examine the effect of open access on the geographic scope of the spot market using monthly spot price data from 1984 91 three statistical tests are applied and compared price correlations granger causality and cointegration we find that open access integrated the regional wellhead markets into a national competitive market for natural gas the effects of unbundling on contracts for natural gas are then investigated incentives for long term contracts between pipelines and producers are shown to be effectively removed by the introduction of competitive buying and selling of gas at the wellhead through open access

marketing orders as nontariff trade barriers previous analysis shows that under autarky all groups must lose from minimum quality standards with symmetric information we find that with international trade it is possible for one country to gain by introducing minimum quality standards however it is not possible for both countries to gain from the standards this result implies that minimum quality standards are nontariff trade barriers using the walter and baldwin criteria