does exchange rate variability depress trade flows evidence from error correction models this paper examines the impact of exchange rate volatility on the trade flows of the g 7 countries in the context of a multivariate error correction model the error correction models do not show any sign of parameter instability the results indicate that the exchange rate volatility has a significant negative impact on the volume of exports in each of the g 7 countries assuming market participants are risk averse these results imply that exchange rate uncertainty causes them to reduce their activities change prices or shift sources of demand and supply in order to minimize their exposure to the effects of exchange rate volatility this in turn can change the distribution of output across many sectors in these countries it is quite possible that the surprisingly weak relationship between trade flows and exchange rate volatility reported in several previous studies are due to insufficient attention to the stochastic properties of the relevant time series copyright 1993 by mit press

can portmanteau nonlinearity tests serve as general mis specification tests a number of recent papers have employed the bds test as a general test for mis specification for linear and nonlinear models we show that for a particular class of conditionally heteroscedastic models the bds test is unable to detect a common mis specification our results also demonstrate that specific rather than portmanteau diagnostics are required to detect neglected asymmetry in volatility however for both classes of tests reasonable power is only obtained using very large sample sizes

hysteresis in international trade a general equilibrium analysis abstract this paper presents a simple general equilibrium model of hysteresis in international trade i e temporary exchange rate fluctuations can have persistent effects on trade flows besides supporting earlier partial equilibrium results the analysis bears out a conjecture by baldwin and krugman 1989 that a hysteretic shift in trade flows will cause a hysteretic shift in the equilibrium exchange rate a positive demand shock which leads to a temporary exchange rate appreciation is followed by a persistent depreciation another implication is that equity values in the country with a positive demand shock will ultimately fall below their pre shock level temporarily high profits reduce future profitability by attracting competitors who remain in the market after the shock has receded jel f10

exclusive contracts and protection of investments we consider the effect of a renegotiable exclusive contract restricting a buyer to purchase from only one seller on the levels of noncontractible investments undertaken in their relationship contrary to some informal claims in the literature we find that exclusivity has no effect when all investments are fully specific to the relationship i e are purely internal exclusivity does matter when investments affect the value of the buyer s trade with other sellers i e have external effects we examine the effects of exclusivity on investments and aggregate welfare and the private incentives of the buyer seller coalition to use it

research joint venture with technology transfer kamien et al 1992 show that an industry wide research joint venture rjv compared to the case without any rjv does not lead to better technological development or a higher consumer surplus in contrast we show that every non industry wide rjv leads to strict improvements in both measures and it also results in higher production efficiency furthermore when technology transfer is possible after making rd et lorsque l efficacite de la recherche est faible ces ameliorations s amplifient davantage les gouvernements devraient promouvoir l innovation par l entremise de collaborations independantes avec transfert de technologie comme alternative a l etablissement de consortiums de recherche a l echelle de tout un secteur

patent pools litigation and innovation this article analyzes patent pools and their effects on litigation incentives overall royalty rates and social welfare when patent rights are probabilistic and can be invalidated in court with probabilistic patents the license fees reflect the strength of the patents we show that patent pools of complementary patents can be used to discourage infringement by depriving potential licensees of the ability to selectively challenge patents and making them committed to a proposition of all or nothing in patent litigation if patents are sufficiently weak patent pools with complementary patents reduce social welfare as they charge higher licensing fees and chill subsequent innovation incentives

why are small firms different managers views do incentives differ between large and small organizations results from a representative survey of compensation managers are used to shed light on the issues i find that i small establishments rely less on pecuniary incentives and have a significantly more hostile attitude towards incentive schemes based on competition and relative rewards ii large units are more vulnerable to mechanisms of efficiency wages effects that remain even after controlling for differences in monitoring ability iii large units are more prone to indicate that negative reciprocity is important and that their employees care about relative pay i argue that these findings fit with behavioral stories of incentives and motivation in particular those stressing group interaction effects inequity aversion and gift exchange

patenting in the shadow of competitors this article empirically examines the patenting behavior of new biotechnology firms that have different litigation costs i show that firms with high litigation costs are less likely to patent in subclasses with many other awards particularly those of firms with low litigation costs this pattern is consistent with the literature on costly litigation which suggests that firms that have high litigation costs will take greater precautions to avoid litigation these results are robust to a variety of control variables and modifications that seek to test alternative explanations

exchange rate volatility and foreign trade evidence from thirteen ldc s this article investigates empirically the impact of real exchange rate volatility on the export flows of 13 less developed countries ldc s over the quarterly period 1973 1996 estimates of the cointegrating relations are obtained using johansen s multivariate procedure estimates of the short run dynamics are obtained for each country using the error correction technique the major results show that increases in the volatility of the real effective exchange rate approximating exchange rate uncertainty exert a significant negative effect on export demand in both the short run and the long run in each of the 13 ldc s these effects may result in significant reallocation of resources by market participants

exchange rate volatility and intervention implications of the theory of optimum currency areas we show that variables pointed to by the theory of optimum currency areas ocas help to explain patterns of exchange rate variability and intervention across countries but oca considerations affect exchange market pressures and intervention in different ways exchange market pressures mainly reflect asymmetric shocks while intervention largely reflects the variables that oca theory suggests cause countries to value stable exchange rates small size and the extent of trade links intervention and exchange market pressure also vary with the structure of the international monetary system

the e correspondence principle we present a new application of samuelson s correspondence principle to the analysis of comparative dynamics in stochastic rational expectations models our version which we call the e correspondence principle applies to rational expectations equilibria that are stable under least squares and closely related learning rules with this technique it is sometimes possible to study without explicitly solving for the equilibrium how qualitative properties of the equilibrium are affected by changes in the model parameters applications to overlapping generations and new keynesian models illustrate the potential of the technique

asymmetric exchange rate exposure theory and evidence abstract this paper tests the hypothesis that exchange rate exposure is asymmetric over appreciation depreciation cycles more specifically it investigates whether returns on nine sector indexes across four major countries are asymmetrically affected by exchange rate movements the results show that in several instances exposure is asymmetric asymmetries are found to be more pronounced in the financial and non cyclical sectors possible theoretical explanations are provided regarding the particular type of exposure found across sectors and countries

efficient division of profits from complementary innovations abstract many products including microprocessors telecommunications devices computer software and on line auction services make use of multiple technologies each of which is essential to make or sell the product the owner of one technology benefits from the existence of complementary technologies we show that despite this externality the structure of payoffs that support efficient r d investment by duopolists racing to discover a single innovation generalizes to the structure that supports efficient investment for complementary innovations the paper also examines how alternative intellectual property regimes and legal institutions affect r d investment in complementary technologies the results have policy implications for the organization of r d the assessment of damages for patent infringement and allocations of value in patent pools

the impact of exchange rate volatility on international trade reduced form estimates using the garch in mean model abstract in this paper we use a multivariate garch in mean model of the reduced form of multilateral exports to examine the relationship between nominal exchange rate volatility and export flows and prices the model imposes rationality on perceived exchange rate volatility unlike conventional two step strategies tests are performed for five industrialized countries over the post bretton woods era we find that the garch conditional variance has a statistically significant impact on the reduced form equations for all countries for most of the countries the magnitude of the effect is stronger for export prices than quantities in addition the estimated magnitude of the impact of volatility on exports is not robust to using the conventional estimation strategy jel f41 f31

optimal licensing of uncertain patents in the shadow of litigation this paper investigates the choice of a licensing mechanism by the holder of a patent whose validity is uncertain we provide sufficient conditions of a general nature under which the licensor prefers to use a per unit royalty contract in particular we show that this is the case for the holders of weak patents if the strategic effect of an increase in a potential licensee s unit cost on the equilibrium industry profit is positive the latter condition is shown to hold in a cournot resp bertrand oligopoly with homogeneous resp differentiated products under general assumptions on the demands faced by firms as a byproduct of our analysis we contribute to the literature on the cost paradox in oligopoly by offering some new insights of independent interest regarding the effects of cost variations on cournot and bertrand equilibria

the effects of exchange rate volatility on exports some new estimates investigations of the impact of exchange rate volatility on exports have not allowed for the integrated non stationary of the variables employed in estimation the results reported in this note are suggestive that in the context of an error correction framework real exchange rate volatility has a significant impact on exports

persistent trade effects of large exchange rate shocks this paper presents a theoretical basis for the argument that large exchange rate shocks such as the 1980s dollar cycle may have persistent effects on trade flows and the equilibrium exchange rate itself we begin with a partial equilibrium model in which large exchange rate fluctuations lead to entry or exit decisions that are not reversed when the currency returns to its previous level then we develop a simple model of the feedback from hysteresis in trade to the exchange rate itself here we see that a large capital inflow which leads to an initial appreciation can result in a persistent reduction in the exchange rate consistent with trade balance

exchange rate depreciation and exports the case of singapore revisited this article revisits the weak relationship between exchange rate depreciation and exports for singapore using a bivariate generalized autoregressive conditional heteroscedasticity in mean model that simultaneously estimates time varying risk the evidence shows that depreciation does not significantly improve exports but that exchange rate risk significantly impedes exports in sum singaporean policy makers can better promote export growth by stabilizing the exchange rate rather than generating its depreciation

efficient patent pools the paper builds a tractable model of patent pools agreements among patent owners to license sets of their patents it provides a necessary and sufficient condition for patent pools to enhance welfare and shows that requiring pool members to be able to independently license patents matters if and only if the pool is otherwise welfare reducing the paper allows patents to differ in importance asymmetric blocking patterns and licensors to also be licensees we undertake some initial exploration of the impact of pools on innovation the analysis has broader applicability than pools being relevant to a number of co marketing arrangements

foreign exchange markets overview of the special issue introduction by way of abstract two decades ago exchange rate economics seemed to be in total shambles that however did not last long science proceeds by successive approximations and in the intervening years the foreign exchange market became one of the most heavily researched areas in economics the first wave of findings to come out of this new research concerned the centuries old theoretical construct of purchasing power parity and relatedly the behavior of real exchange rates here the consensus gradually shifted from the widespread view that ppp had collapsed to the view that it was in fact a useful empirical first empirical approximation in the long run as lothian and taylor 1996 put it in an introduction to the jimf conference issue on exchange rate modeling published in 1998 one of us wrote koedijk 1998 1 ten years of data and estimation techniques later the outlook is less bleak at least in the medium run a predictable relationship between exchange rates and economic fundamentals has re emerged and reintroduced tempered optimism in exchange rate economics

decentralized taxation and the size of government evidence from swiss state and local governments according to the leviathan model fiscal federalism is seen as a binding constraint on a revenue maximizing government the competitive pressure of fiscal federalism is supposed to reduce public sector size as compared to unitary states however empirical results concerning the leviathan hypothesis are mixed this study uses a state and local level panel data set of swiss cantons from 1980 to 1998 to empirically analyze the effect of different federalist institutions on the size and structure of government revenue because of the considerable tax autonomy of sub national swiss governments it is possible to investigate different mechanisms by which fiscal federalism may influence government size the results indicate that tax exporting has a revenue expanding effect whereas tax competition favors a smaller size of government fragmentation has essentially no effect on the size of government revenue for swiss cantons the overall effect of revenue decentralization leads to fewer tax revenue but higher user charges thus revenue decentralization favors a smaller size of government revenue and shifts government revenue from taxes to user charges

exchange rate effects on the volume and variability of trade flows abstract this paper investigates the effects of exchange rate uncertainty on the volume and variability of trade flows employing a signal extraction framework we show that the direction and magnitude of importers and exporters optimal trading activities depend upon the source of the uncertainty general microstructure shocks fundamental factors driving the exchange rate process or a noisy signal of policy innovations providing a rationale for the contradictory empirical evidence in the literature we also show that exchange rate uncertainty emanating from general microstructure shocks and the fundamental factors reduces the variability of trade flows while that related to a noisy signal of policy innovations increases variability

on the long term effectiveness of exchange rate communication and interventions abstract exchange rate communication has come to play an increasingly important role as a policy tool for monetary authorities over the past decade the paper assesses the strategies and the long term effectiveness of communication as well as actual interventions the empirical results for the g3 economies indicate that communication has not only exhibited a significant contemporaneous effect on exchange rates but also has moved forward exchange rates up to a horizon of 6 months in the desired direction moreover communication is found to reduce exchange rate volatility and uncertainty whereas actual interventions tend to raise it overall this underlines a key difference between these two policy tools and suggests that communication tends to be a fairly effective policy tool over the medium term

tariffs quotas and market structure this paper examines the effects of tariffs and quotas on the pricing pattern of producers in the case of duopoly by a domestic monopolist and a foreign monopolist it is pointed out that tariffs and quotas may induce completely different pricing patterns in the two producers under a quota it is always profitable for the home producer to be a price leader and for the foreign producer to be a follower whereas under a tariff either producer may become a leader it is also proved that whatever leader follower relation is chosen under a tariff a quota always bring about a higher domestic price than the tariff as long as both permit the same amount of imports

the settlement of patent litigation in this article i develop a model to analyze patent licensing that is induced as part of a settlement agreement to avoid litigation of the issue of patent validity the patentee possesses private information about patent validity and makes a take it or leave it settlement offer to a single potential rival an essentially unique sequential equilibrium exists if out of equilibrium beliefs are restricted appropriately the model analyzes the effect of the probability of settlement and litigation

characteristics of patent litigation a window on competition 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 mid 1980s 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 copyright 2001 by the rand corporation

the long run volatility puzzle of the real exchange rate abstract this paper documents large cross country differences in the long run volatility of the real exchange rate it shows that the real exchange rate of developing countries is approximately three times more volatile than the real exchange rate in industrial countries the paper shows that this difference in volatility cannot be explained by the fact that developing countries face larger shocks both real and nominal recurrent currency crises or by different elasticities to these shocks arch estimations find a much higher persistence of deviations of the variance of the rer from its long run value when the economy suffers shocks of various kinds

the effects of real exchange rate risk on international trade abstract by assuming real profit maximization and uncertain prices as well as exchange rates we conclude that it is uncertain percentage changes in the real exchange rate that are risky in international trade empirical estimation of fourteen bilateral trade flows among industrialized countries finds a significant negative effect on trade quantity from such risk in a number of these cases the expectation variable has a positive effect in a larger number of cases significant price effects from the expectation variable are fewer and from risk are negligible

real exchange rate behavior the recent float from the perspective of the past two centuries using annual data spanning two centuries for dollar sterling and franc sterling real exchange rates we find strong evidence of mean reverting real exchange rate behavior using simple stationary autoregressive models estimated on prefloat data we easily outperform nonstationary real exchange rate models in dynamic forecasting exercises over the recent float such stationary univariate equations explain 60 80 percent of the in sample variation in real exchange rates although the degree of short run persistence may be high the econometric estimates imply a half life of shocks to the real exchange rate of about 6 years for dollar sterling and a little under 3 years for franc sterling

cross licensing and competition we study bilateral cross licensing agreements between n 2 firms that engage in competition after the licensing phase it is shown that the most collusive cross licensing royalty i e the one that allows the industry to achieve the monopoly profit is sustainable as the outcome of bilaterally efficient agreements in a symmetric setting if the terms of the cross licensing agreements are not observable to third parties the monopoly royalty is the unique symmetric bilaterally efficient royalty however when the terms of the agreements are public the most competitive royalty i e zero can also be bilaterally efficient policy implications regarding the antitrust treatment of cross licensing agreements are derived from these results

real exchange rate volatility and international trade a reexamination of the theory one of the issues that have received considerable attention in the comparison of the properties of alternative exchange rate regimes is the effect of exchange rate risk on the volume of trade it has been argued that the higher volatility of exchange rates witnessed since the adoption of the floating regime in 1973 has led to a decrease in international trade transactions this is because most trade contracts are not for immediate delivery of goods and since they are denominated in terms of the currency of either the importer or the exporter unanticipated fluctuations in the exchange rate affect realized profits and hence the volume of trade it is implicitly assumed that forward exchange markets that can help traders eliminate this type of variations in profits either are not available as it is true for the majority of currencies because most are not fully convertible thereby impairing forward markets or for some reason they are not utilized to fully hedge exchange risk present in trade transactions the empirical evidence regarding the effect of exchange rate risk on trade has at best been inconclusive the large majority of the empirical studies are unable to establish a systematically significant link between exchange rate variability and the volume of international trade whether on an aggregate or on a bilateral basis abrams 1 akhtar and hilton 2 cushman 4 5 6 and kenan and rodrik 12 find some significant negative effects of exchange volatility on exports however bailey tavlas and uhlan 3 hooper and kohlhagen 10 and an international monetary fund study 11 do not find any supporting evidence for the depressing effect of exchange rate volatility on international trade it is also interesting to note that in many of these studies a significant positive effect of exchange rate volatility on the volume of trade is found for some cases however the positive effect believed to be at odds with the theory was either ignored or dismissed as a perverse result since as far as volumes are concerned theoretical considerations

patent pools and cross licensing in the shadow of patent litigation this paper develops a framework to analyze the incentives to form a patent pool or engage in cross licensing arrangements in the presence of uncertainty about the validity and coverage of patents that makes disputes inevitable it analyzes the private incentives to litigate and compares them with the social incentives it shows that pooling arrangements can have the effect of sheltering invalid patents from challenges this result has an antitrust implication that patent pools should not be permitted until after patentees have challenged the validity of each other s patents if litigation costs are not too large

why is it so difficult to find an effect of exchange rate risk on trade abstract it is commonly argued that exchange rate risk hampers international trade however the large literature on this subject has not yet provided conclusive evidence this paper analyzes why it is so difficult to obtain a clear answer from time series analyses we use data on bilateral aggregate u s exports to the other g7 countries the results show that as far as the exchange rate is concerned export decisions are mostly affected by the probability distribution of the about one year ahead rate the riskiness of the exchange rate at such a long horizon appears fairly constant over time with only short term fluctuations this makes it difficult to discover the true effect of exchange rate risk on trade from the time series data that are typically available

export promotion through exchange rate policy exchange rate depreciation or stabilization exchange rate movements affect exports in two ways rate depreciation and rate variability risk a depreciation raises exports but the associated exchange rate risk could offset that positive effect the present paper investigates the net effect for eight asian countries using a dynamic conditional correlation bivariate garch m model that simultaneously estimates time varying correlation and exchange rate risk depreciation encourages exports as expected for most countries but its contribution to export growth is weak exchange rate risk contributes to export growth in malaysia and the philippines leading to positive net effects exchange rate risk generates a negative effect for six of the countries resulting in a negative net effect in indonesia japan singapore and taiwan and a zero net effect in korea and thailand exchange rate movements affect exports in two ways rate depreciation and rate volatility risk the two effects have received considerable attention since the collapse of fixed exchange rates in the early 1970s but no research considers the net total effect on exports of the two potentially offsetting effects this paper investigates the net effect for eight asian countries with engle s 2002 dynamic conditional correlation dcc bivariate garch m model that simultaneously estimates time varying correlation and exchange rate risk the net effect relates to the goal of a foreign exchange intervention depreciation lowers the foreign currency price of exports and probably increases the quantity of exports and export revenue in domestic currency conditions may exist however where export revenue falls highly inelastic foreign import demand leads to falling export revenue ambiguity also arises if export production incorporates high import content since the domestic cost or price of exports rises with depreciation during periods of appreciation exporters might price to market lowering their domestic currency price to maintain export market share theory and empirical evidence exhibits ambiguity as to the effect of the exchange rate on exports and export revenue junz and rhomberg 1973 and wilson and takacs 1979 find that devaluation

exchange rate volatility and international trade the purpose of this note is to show that a positive effect of exchange rate volatility on export production has a theoretical basis the key to this claim is that as the exchange rate volatility increases so does the value of the real option to export to the world market higher volatility increases the potential gains from trade this may explain part of the mixed empirical findings regarding the effects of exchange rate risk on international trade

measuring and analysing the effects of short term volatility in real exchange rates this paper examines short term volatility in the real effective exchange rates of industrial countries and its impact on their imports it yields three conclusions first volatility has not diminished as markets have gained experience with floating exchange rates the trend appears to be in the opposite direction for some countries second exposure to short term volatility has differed among countries japan and sweden have experienced much more than most other industrial countries third volatility appears to depress the volume of international trade this third finding is consistent with results reported by cushman and by akhtar and hilton and challenges earlier findings by hooper and kohlhagen

predation mergers and incomplete information this article examines the strategic pricing of duopolists in anticipation of a takeover of one by the other in equilibrium the acquiring firm may expand its output to signal that it is a low cost rival and thereby improve the takeover terms if the merged firm willface potential entry a premerger expansion of output may be necessary to deter entry and to make the merger profitable in that case the acquiringjirm s output expansion increases industry concentration by facilitating the takeover and by deterring entry this establishes the rationality of predatory output expansions even when a merger or a takeover is possible and indeed anticipated a voluminous literature is devoted to exploring the role of pricing in altering industry structure to achieve monopoly power that literature discusses both price cutting to drive existing rivals from the industry predatory pricing and setting low prices to deter potential entrants limit pricing the former has received the lion s share of the attention of antitrust commentators and enforcers but the rationality of predatory pricing has been seriously questioned the major criticism has two parts i takeovers are a superior means of achieving monopoly power and where legal should therefore be used instead of price cutting and ii if a takeover is anticipated premerger price cutting merely dissipates some of the value of the merging parties and would thus be irrational the first argument was originally advanced by mcgee 1958 and later by telser 1965 and bork 1978 the essential idea is that since predation is costly firms should realize that a more profitable arrangement in the form of a merger exists and ought to be negotiated the second argument is a natural extension of the first in response to this criticism yamey 1972 provides two arguments first the aggressor knows that he may face other rivals in the future entrants into this or other markets those potential rivals may draw inferences from his current behavior about the response they will face if they enter in that case the aggressor may wish to develop a reputation for aggressive behavior second even if a takeover is anticipated the terms of the takeover may be affected by the pretakeover pricing

real exchange rate volatility and the us bilateral trade a var approach this paper uses var models to investigate the impact of real exchange rate volatility on u s bilateral imports from the united kingdom france germany japan and canada the var systems include u s and foreign macro variables and are estimated separately for each country the major results suggest that the effect of volatility on imports is weak although permanent shocks to volatility do have a negative impact on this measure of trade and those effects are relatively more important over the flexible rate period copyright 1989 by mit press

exchange rate volatility and international trading strategy abstract it is usually argued that an increase in exchange rate volatility reduces the volume of international trade as trading firms are risk averse this paper shows that exporting firms benefit under fairly general conditions from an increase in exchange rate volatility firms optimally adjust their export volumes to the level of the exchange rate exporting is an option which is exercised if profitable in addition the paper presents conditions under which the volume of international trade grows with exchange rate volatility

how strong are weak patents economists usually conceive of patents as property rights that prevent others from practicing the patenting technology unless they first obtain a license from the patent holder even for ironclad patents i e for patents that are certain to be valid the existing literature has shown that the analysis of equilibrium licensing contracts is surprising subtle and complex 1 for example the analysis is quite different depending upon whether one firm s licensing contract is observable to the other firms likewise equilibrium outcomes are quite different if royalties must be linear than in the case where two part tariffs and other non linear royalties are permitted in that literature a downstream firm that refuses to sign a contract with the upstream supplier either exits the industry in the case that the upstream supplier controls an essential input or must rely on more costly inputs in the case of a non essential input in other words the downstream firm s threat point is to use some backstop technology in practice however patents are issued after a brief examination by the patent office to see if they meet the statutory requirements for novelty and non obviousness mounting evidence indicates that many weak patents i e patents unlikely to be found valid if challenged in court are issued by the u s patent and trademark office uspto 2 some observers view this with great alarm arguing that uspto is handing out undeserved monopolies others by contrast have suggested that these weak patents are of little concern because they will have little commercial impact because they will be licensed at commensurately low royalty rates or not enforced at all we study the commercial impact of weak patents more precisely we define a patent s strength as the probability that it will be found valid if challenged in court and we examine the relationship between a patent s strength and the royalties that it can command the distinctive

preemptive patenting and the persistence of monopoly this article takes a different tack and inquires whether institutions such as the patent system create opportunities for firms with monopoly power to maintain their monopoly power the results apply to other situations such as brand identification spatial location and capacity expansion which share the characteristic that early or preemptive actions may lower the returns to potential competitors

cooperating with competitors patent pooling and choice of a new standard abstract i examine the efficiency of patent pooling in a setting that allows for the interplay between the standards process in which owners of essential intellectual property ip develop a new product and the subsequent pooling decision in which ip prices are coordinated if one of the ip owners is also the incumbent of a product that employs the current competing standard referred to as overlapping ownership then the relationship among the ip owners will be both vertical through their ip and horizontal through their competing interests in the final products consumers are better off when ip owners cooperate even when these owners are effectively competitors because of lower prices and greater product variety consumers prefer however that the agreements not admit firms with overlapping ownership these results inform antitrust policy on cooperative agreements among competitors

on the elasticities of harvesting rules abstract in this paper we rank the relative importance of the exogenous parameters upon the optimal harvesting size in a stochastic rotation problem we show that when the tree growth follows geometric brownian motion the harvesting size is most elastic to the harvesting cost followed by the interest rate and is least elastic to the parameters of tree growth similar ranking holds for the linear growth case in both cases the harvesting size is increasing and concave in the harvesting cost bounded between two parallel lines the harvesting decision is made according to a stochastic extension of the faustmann formula

bilateral trade flows the linder hypothesis and exchange risk bilateral trade flows are used to examine the linder hypothesis and the effect of exchange rate variability in a gra vity type trade model derived from an underlying demand and supply mo del a behavioral model is used to justify examining these issues joi ntly the model performs well empirically using a sample of seventeen countries for the period 1974 82 the authors find overwhelming supp ort for the linder hypothesis and this version of the gravity model moreover they find strong support for the hypothesis that increased exchange rate variability affects bilateral trade flows copyright 1987 by mit press

does exchange rate risk affect exports asymmetrically asian evidence abstract this paper tests the hypothesis of asymmetric effects of exchange rate risk with a dynamic conditional correlation bivariate garch 1 1 m model the asymmetry means that exchange rate risk volatility affects exports differently during appreciations and depreciations which may reflect exporter s asymmetric risk perception and hedging behavior using bilateral exports from eight asian countries to the us the real exchange rate risk significantly affects exports for all countries negative or positive in periods of depreciation or appreciation thus policy makers can consider the stability of the exchange rate in addition to its depreciation as a method of controlling export growth

conditional exchange rate volatility and the volume of international trade evidence from the early 1900s exports from britain to the united states from 1900 to 1940 are examined to ascertain the effect of exchange rate volatility on the volume of trade in addition to using a rolling standard deviation measure of exchange rate uncertainty the conditional variance of the exchange rate series modeled as a generalized autoregressive conditional heteroskedastic process is used to generate an alternative measure of exchange rate uncertainty the results of estimation using the two measures of exchange rate volatility suggest that increases in the volatility of the real exchange rate reduce the volume of trade copyright 1992 by mit press

the impact of exchange rate volatility on international trade flows despite the best efforts of economists a basic paradox as to the impact of exchange rate volatility on trade flows remains unresolved at both the theoretical and empirical level this paper surveys the vast literature in the area in an attempt to identify major issues which have contributed to the development of the debate and examine whether any general direction for consensus may be found

exchange rate appreciation and export competitiveness the case of singapore policy prescriptions have generally assumed that exchange rate depreciation would stimulate exports and curtail imports while exchange rate appreciation would be detrimental to exports and encourage imports this prediction has however often neglected to consider the existence of the import content of exports as well as the dynamic effects of productivity improvements our paper seeks to show empirically the significance of these two factors in affecting the competitiveness of singapore s exports specifically the paper shows that in the presence of high import content exports are not adversely affected by currency appreciation because the lower import prices due to appreciation reduce the cost of export production in the case of singapore this cushioning effect outweighs that of the effect of productivity gains on export competitiveness the service exports however with a very low import content tend to suffer from currency appreciation

do patents work thickets trolls and antibiotic resistance this paper connects ideas from recent literature on the economics of intellectual property ip to address the question did the strengthening and broadening of ip rights from important patent policy changes in the us promote greater innovation the analysis rests on the theory of cumulative innovation which shows that if ip rights on a pioneer invention extend to follow on research and impediments to contracting exist then strengthening patents can actually reduce overall innovation recent empirical studies are consistent with the theory patents can significantly deter follow on research in complex technology areas where contracting is difficult computers electronics telecommunications but not in drugs chemicals and human genes i outline remedies from court decisions and antitrust policy for addressing inefficiencies from patent trolling patent thickets and the anti commons of fragmented ownership i then apply the analysis to the antibiotics market drawing on recent research to examine how patent and competition policies can be used to improve incentives for drug development in the battle against antibiotic resistance the literature provides persuasive evidence that the policy changes overreached in broadening and strengthening ip rights and reveals important patent reforms for improving the effectiveness of patent systems in the us and canada

has exchange risk depressed international trade the impact of third country exchange risk abstract this paper argues that the effect of exchange risk on bilateral and aggregate trade flows should be analyzed by including the impact of third country exchange risk factors in addition to direct bilateral or multilateral risk after a theoretical examination of these effects us bilateral export flow to its six largest trading partners are analyzed empirically i find individuality and jointly significant third country risk effects in most cases in contrast to some recent bilateral efforts i find a steadily growing negative impact on trade flows from exchange risk during floating and in contrast to recent aggregate trade flow studies i conclude that there was no temporary decline in exchange risk during the late 1970s

patent litigation as an information transmission mechanism patent litigation reveals important information about the validity of the contested patent to other potential entrants this paper explores the implications of such informational externalities for entry dynamics in the presence of multiple potential entrants the nature of the entry game can be one of either waiting or preemption depending on the degree of patent protection therefore the payoffs for the patentee and the initial imitator are discontinuous in the degree of patent protection furthermore strengthening intellectual property rights is not necessarily desirable for the patentee the analysis may also help explain the apparently puzzling practice of delaying patent suits copyright 1998 by american economic association

product differentiation and oligopoly in international markets the case of the u s automobile industry this paper develops and estimates a model of the u s automobile industry on the demand side a discrete choice model is adopted that is estimated using micro data from the consumer expenditure survey the estimation results are used in conjunction with population weights to derive aggregate demand on the supply side the automobile industry is modelled as an oligopoly with product differentiation equilibrium is characterized by the first order conditions of the profit maximizing firms the estimation results are used in counterfactual simulations to investigate two trade policy issues the effects of the ver and exchange rate pass through

exchange rates and the trade balance abstract the impact of the exchange rate on the trade balance is examined for a number of developing countries non structural techniques indicate that a depreciation of the real exchange rate is not strongly associated with a significant improvement in the trade balance

exchange risk exposure and the option to trade rather than impeding trade increased exchange rate uncertainty may on average create trade as it implies a higher probability that ex post deviations from commodity price parity will exceed tariffs and transportation costs we demonstrate such an effect in a small country short term model under the alternative assumptions of perfect competition and of a monopolist trader producer the proofs rely on the fact that such firms exposures can be replicated and hedged by standard options under partial monopoly scenarios the effect of volatility is ex ante unclear though jel f31

exchange rate variability and the flow of international trade abstract this study uses a garch generalized autoregressive conditional heteroskedasticity model to test if real exchange rate volatility has an adverse effect on the value of u s imports from canada we find that exchange rate uncertainty has a negative and statistically significant affect on trade flows