preferential trading arrangements as strategic positioning abstract we analyze a three country model of trade negotiations in which countries can form bilateral free trade areas bilateral customs unions or a trilateral preferential trading arrangement and can continue negotiating after reaching an agreement in contrast to the literature on multilateral bargaining the set of agreements can form a nonpartitional network while in contrast to the network literature players can reach multilateral agreements patient enough countries only reach bilateral agreements if insiders gain more than outsiders which allows them to manipulate the status quo in subsequent negotiations however a hub and spoke pattern may then emerge and insiders then dissipate the advantages of strategic positioning we also use variants on the model to explain why a us commitment not to bargain bilaterally sustained progress at gatt negotiations and the rarity of open access preferential trading arrangements

customs unions and domestic taxes it is well known that nondiscriminatory domestic taxes and subsidies are perfect substitutes for nondiscriminatory trade policies and would render useless international agreements restricting trade policy alone the author shows that these instruments generally are imperfect substitutes for trade policy in a customs union however in one popular specification of trading patterns access to such tax powers nevertheless renders a customs union useless furthermore numerical simulations demonstrate that a union may be ineffective in many other cases severely curtailing the potential unions that are attractive to both members the author illustrates the restrictive conditions under which a union will then form

endogenous free trade agreements and the multilateral trading system i evaluate in this paper the impact of free trade areas ftas on the world trading system i use an oligopolistic political economy model where the external tariffs of fta members as well as the decision to form ftas are endogenously determined in this context i show that ftas are primarily beneficial to the multilateral trading system this conclusion is based first upon the finding that ftas induce their member governments to lower their external tariffs and to do so deeply enough to enhance trade even between fta members and non members while this ensures gains for the latter in general fta members may not gain i show however that governments will endorse only welfare improving arrangements in spite of their political motivations as a result fta members benefit from ratified arrangements as well finally i find that ftas by reducing the role of special interests criteria in governments trade regime decisions also tend to enhance support for further liberalization at the multilateral level

discriminatory tariffs and international negotiations abstract recent research has highlighted the efficiency of the mfn principle within the gatt wto structure this paper analyzes the exception made to mfn within article xxiii that allows discriminatory punishment for deviations from the agreement we argue that in the absence of collusion the mfn exception reduces the severity of punishment and thus lowers the level of cooperation that can be achieved by the agreement however discriminatory punishment may still be beneficial as we show that it reduces the problems associated with the potential for renegotiation during the punishment phase finally we argue that our results are also applicable to the question of whether to use trade policy sanctions as a means of enforcing agreements covering domestic policies

some welfare effects of sequential customs union formation this paper deals with the effects on world welfare of sequential customs union formation a computational model of customs union formation is developed and simulated under a variety of assumptions these assumptions concern various characteristics of the world the pattern of customs union formation and gatt restrictions on common external tariffs the results show that unrestricted customs union formation is likely to result in successive deterioration of world welfare despite gains for the member countries collectively an examination of the current gatt guidelines however suggests that if they were vigorously enforced world welfare would rise with customs union formation

green goals and full employment are they compatible abstract two empirical correlations are studied one between economic growth and environmental impacts and the other between the lack of economic growth and unemployment it is demonstrated that at a global level economic growth is strongly correlated with environmental impacts and barriers to fast decoupling are large and numerous on the other hand low or negative growth is highly correlated with increasing unemployment in most market economies and strategies to change this lead to difficult questions and tradeoffs the coexistence of these two correlations which have rarely been studied together in the literature on green growth degrowth and a growth justifies ambivalence about growth to make key environmental goals compatible with full employment the decoupling of environmental impacts from economic output has to be accompanied by a reduction of dependence on growth in particular strategies to tackle unemployment without the need for growth several of which are studied in this article need much more attention in research and policy

optimal tariff equilibria with customs unions the authors construct a model of customs unions in which countries charge optimal tariffs customs unions internalize the externality that exists whenever two countries import the same good also customs unions make several countries into one large unit with more market power big customs unions can improve their members welfare relative to the free trade the authors model of customs unions separates the effects of tariff reduction from the effects of policy coordination the movement from nash equilibrium to a free trade association improves global resource allocations moving from a free trade association to a full customs union has ambiguous resource allocation effects

issue linkage and issue tie in in multilateral negotiations we describe a model of international multidimensional policy coordination where countries can enter into selective and separate agreements with different partners along different policy dimensions the model is used to examine the implications of negotiation tie in the requirement that agreements must span multiple dimensions of interaction for the viability of multilateral cooperation when countries are linked by international trade flows and transboundary pollution we show that while in some cases negotiation tie in has either no effect or can make multilateral cooperation more viable in others a formal tie in constraint can make an otherwise viable joint multilateral agreement unstable

bilateralism and free trade we study a setting with many countries in each country there are firms that can sell in the domestic as well as foreign markets countries can sign bilateral free trade agreements that lower import tariffs and thereby facilitate trade we allow a country to sign any number of bilateral free trade agreements a profile of free trade agreements defines the trading regime our principal finding is that in symmetric settings bilateralism is consistent with global free trade we also explore the effects of asymmetries across countries and political economy considerations on the incentives to form trade agreements

okun s law theoretical foundations and revised estimates okun s law has been accepted as an empirical regularity that predicts a 3 percentage point increase in output for every 1 point reduction in the unemployment rate but only because other facts such as weekly hours induced labor supply and productivity tend to rise as well when output gaps are estimated for the u s economy with a production function approach using two different data sets for potential output and nairu it is found that the marginal contribution of a 1 point reduction in unemployment is only about two thirds percent increase in output changes in weekly hours and capacity utilization have independent effects on the output gap copyright 1993 by mit press

seasonality in dynamic regression models this paper examines the implications of treating seasonality as an unobserved component which changes slowly over time this approach simplifies the specification of dynamic relationships by separating non seasonal from seasonal factors we illustrate this approach using the consumption model of davidson et al 1978 and estimate a stable error correction model between consumption income and prices over the period 1958 92 more generally we argue that autoregressive models are unlikely to successfully model slowly changing seasonality and may confound seasonal effects with the dynamic responses of prime interest our approach can be used in a wide range of cases and we show that there is little loss in efficiency even if seasonality is deterministic

is the wto passe the wto has delivered policy outcomes that are very different from those likely to emerge out of the recent wave of preferential trade agreements ptas should economists see this as an efficient institutional hand off where the wto has carried trade liberalization as far as it can manage and is now passing the baton to ptas to finish the job this paper surveys a growing economics literature on international trade agreements and argues on this basis that the wto is not passe rather and subject to some caveats this survey of research to date suggests that the wto warrants strong support while a more cautious view of ptas seems appropriate

a new approach to decomposition of economic time series into permanent and transitory components with particular attention to measurement of the business cycle abstract this paper introduces a general procedure for decomposition of non stationary time series into a permanent and transitory component allowing both components to be stochastic the permanent component is shown to be a random walk with drift and the transitory or cyclical component is a stationary process with mean zero the decomposition methodology which depends only on past data and therefore is computable in real time is applied to the problem of measuring and dating business cycles in the portwar u s economy we find that measured expansions and contractions are of roughly equivalent duration and that our dating of cyclical episodes tends to lead the traditional nber dating and to a lesser extent the growth cycle chronology of zarnowitz and boschan 1977

rules for the disposition of tariff revenues and the determination of common external tariffs in customs unions abstract this paper is about the determination of common external tariffs cets in customs unions cus we first examine how the relationship between preferences over cet levels technology and the distribution of factor ownership in a cu is conditioned by the rule that determines the disposition of tariff revenues we then explore how majority voting at the country level translates these preferences into an equilibrium cet among other things we find that when revenues are partitioned in proportion to members imports tariff preferences may be polarized the trade patterns of some cu members may be endogenous and as a result their payoff functions may not be single peaked this leads to voting outcomes that dramatically differ from those arising under other sharing rules e g the population and consumption rules and raises the possibility of a condorcet paradox

winners and losers from the gradual formation of trading blocs although global free trade is efficient each country s benefit from free trade depends on the path that leads to the global free trade agreement using a dynamic model of trading bloc formation we show that when global free trade is reached gradually the countries that are initially excluded gain less than the rest and may be even made worse off by the final free trade agreement than they were in the initial state of no trading blocs

okun s law across time and frequencies abstract we present the first assessment of u s okun s law across time and frequencies we use a set of continuous wavelet tools that allows for estimating okun s coefficient and the lead lag of output over unemployment at each moment and for each cyclical frequency we find similar results for the gaps and the first differences specifications at business cycles frequencies but not at lower frequencies okun s coefficient has increased in absolute value since the mid 1960s except in 1985 1995 and is not particularly sensitive to recessions the lead of output varies considerably over time and also at different frequencies we observe especially with the gaps specification that there are at least two cyclical processes relevant for the okun s relationship one at the business cycle and another at lower frequencies methods that do not take this into account are bound to mix the information embedded in both cycles

the okun curve is non linear abstract this paper presents cross country evidence on a non linear okun curve the analysis is based on a simple error correction model of unemployment the model is estimated using a threshold model estimator evidence from 20 oecd countries for the period 1960 1997 provides support for the existence of non linearities in terms of the output growth effects output growth has a strong effect on unemployment when unemployment is low and output is high and vice versa thus in bad times the effect of output growth on unemployment can be close to zero

delegation in a general equilibrium model of customs unions abstract a difference in the objectives of members of a customs union may be a unifying rather than a divisive force if countries outside the union behave strategically one union member may want to delegate to its partner the ability to set the common external tariff we demonstrate these results in the context of a pure exchange general equilibrium trade model we show that if tariffs are strategic substitutes the union country which is relatively less well endowed in the exported good may be willing to delegate to its partner which behaves more aggressively in setting the union s policy the delegation decision is reversed if tariffs are strategic complements the model extends the standard results on the appropriate level of the union policy by adding another dimension that of the optimal decision making agent

honest on mondays honesty and the temporal separation between decisions and payoffs abstract we show that temporally distancing the decision task from the payment of the reward increases honest behavior each of 427 israeli soldiers fulfilling their mandatory military service rolled a six sided die in private and reported the outcome to the unit s cadet coordinator for every point reported the soldier received an additional half hour early release from the army base on thursday afternoon soldiers who participated on sunday the first work day of the week are significantly more honest than those who participated later in the week we derive practical implications for eliciting honesty

growth unemployment and labour market institutions evidence from a cross section of eu regions the responsiveness of unemployment to growth is an issue of ongoing political and academic interest economic growth is supposed to be the key to increase labour demand and reduce unemployment departing from okun s law most research on the unemployment intensity of growth has focused on national disparities and the role of labour market institutions empirical evidence at the regional level is scarce we investigate differences in regional labour market responsiveness and their potential determinants for a cross section of european regions the data set covers the nuts 2 regions in the eu15 for the period 1980 to 2002 following a spatial modelling approach interaction among neighbouring labour markets is taken into account our findings point to substantial differences in labour market effects of output growth among european countries and regions both national labour market institutions and regional characteristics such as structural change explain a significant part of these disparities

fair optimal or detrimental environmental vs strategic use of border carbon adjustment abstract we carry out a detailed sensitivity analysis of border carbon adjustment rates by applying a global computable general equilibrium cge gtap7 based model we find different incentives for the regions in the climate coalition to raise carbon based border tax rates btax above the standard rate that mimics an equalisation of carbon prices across regions herein the strategic use of btax the manipulation of the terms of trade is stronger for all coalition regions than the environmental use the reduction of carbon emissions abroad higher btax can reduce carbon leakage but with a declining marginal effect furthermore we find different incentives for regions outside the coalition to oppose high btax rates russia and the other energy exporters would oppose it while the low income countries would not because of benefits from the trade diversion effect thus btax encourages the former to join the coalition while compensating transfers are necessary to encourage the other developing countries including china and india

investigation of production sales and inventory relationships using multicointegration and non symmetric error correction models the accumulated sum of a stationary series is called integrated if a linear combination of some of the integrated series is stationary it is said to be cointegrated this paper presents empirical results on inventories to consider the possibility of a deeper form of cointegration called multicointegration which is introduced in granger and lee 1989 a vector integrated series is multicointegrated if the accumulated sum of its stationary cointegrated linear combination is again cointegrated with itself inventory which is the accumulated sum of production minus sales is probably cointegrated with production and sales the empirical results generally support the presence of multicointegration of production and sales in many u s industries and industrial aggregates the results also favour the non symmetric error correction model providing evidence that the strength of attraction is different on both sides of the attractor a modified s s rule for inventory control is investigated in the context of a non symmetric error correction model and the results generally do not support the s s rule sufficient evidence is found to conclude that multicointegration is a useful concept in the area of inventory determination

detrending stylized facts and the business cycle the stylized facts of macroeconomic time series can be presented by fitting structural time series models within this framework we analyse the consequences of the widely used detrending technique popularised by hodrick and prescott 1980 it is shown that mechanical detrending based on the hodrick prescott filter can lead investigators to report spurious cyclical behaviour and this point is illustrated with empirical examples structural time series models also allow investigators to deal explicitly with seasonal and irregular movements that may distort estimated cyclical components finally the structural framework provides a basis for exposing the limitations of arima methodology and models based on a deterministic trend with a single break

the effect of the canada us free trade agreement on canadian multilateral trade liberalization in this paper show that the canada us free trade agreement cusfta tariff preferences have triggered a decline in canadian external tariffs explaining a two percentage point reduction in the average tariff between 1989 and 1998 next we found that industries that generate the least export rent to the us firms experienced deeper tariff cuts in canada this result provides evidence of cooperation in trade policies between the us and canada finally we estimate the effect of the cusfta on the intensity of industrial lobbying for trade policy in canada and find no relationship between preferential trade liberalization and lobbying activity resume l effet de l accord de libre echange canada u s sur la liberalisation multilaterale du commerce canadien dans ce texte on montre que les preferences tarifaires de l accord de libre echange canada us alecus ont declenche un declin dans le niveau des droits de douane externes canadiens et expliquent une reduction de deux points de pourcentage dans le tarif moyen entre 1989 et 1998 ensuite on decouvre que les industries qui generent le moins de rentes des exportations vers les etats unis font l experience de reduction de tarifs plus importante au canada ce resultat revele une cooperation dans les politiques commerciales entre canada et etats unis enfin on evalue l effet de l alecus sur l intensite du lobbying industriel a propos de la politique commerciale au canada et on decouvre qu il n existe pas de relation entre la liberation preferentielle du commerce et l intensite de l activite de lobbying

an analysis on the structural stability of okun s law a cross country study okun s law postulates an inverse relationship between movements of the unemployment rate and the real gross domestic product gdp this article investigates okun s law for 15 oecd countries and checks for its the structural stability by using data on employment and the labour force whether structural instability is caused either from the demand side or supply side is inferred

trends and cycles in macroeconomic time series two structural time series models for annual observations are constructed in terms of trend cycle and irregular components the models are then estimated via the kalman filter using data on five u s macroeconomic time series the results provide some interesting insights into the dynamic structure of the series particularly with respect to cyclical behavior at the same time they illustrate the development of a model selection strategy for structural time series models

third country effects of regional trade agreements does regionalism negatively impact non members to answer this question we examine the effect of regional trade agreements rtas on imports from non members and the tariffs that they face using data from six rtas in latin america and europe we do not find evidence that implementation of the regional agreements is associated with trade diversion from third countries to regional members using detailed industry data on preference margins and most favoured nation mfn tariffs for three trade agreements in latin america over 12 years we find that greater preference margins do not significantly reduce imports from third countries we also look at the effect of preferences on external tariffs we find evidence that preferential tariff reduction tends to precede the reduction of external mfn tariffs in a given sector offering evidence of tariff complementarity overall the results suggest that regionalism does not significantly harm non members

okun s law asymmetries and jobless recoveries in the united states a markov switching approach abstract prevailing markov regime switching approaches to asymmetries in okun s law assume either asymmetry between unemployment and output across regimes or asymmetry within a regime we combine both approaches and give an insight into the 1991 and 2001 united states jobless recoveries

are economic time series asymmetric over the business cycle it has long been argued that major cyclical variables such as the unemployment rate display an asymmetric behavior over various phases of the business cycle the paper provides a statistical test for this hypothesis using the framework of finite state markov processes i implement a test to see if the behavior of the unemployment rate is characterized by sudden jumps and slower drops it is argued that the framework provided in the paper can also be used to test other sample path properties of economic time series

on tariff preferences and delegation decisions in customs unions a heckscher ohlin approach this paper studies preferences of customs union cu members over common external tariff cet levels and extends the literature on delegation decisions over trade policy in models with production in a model with similar cu members we prove that most preferred cets can be ranked with the help of compensated price elasticities of import demand functions in the heckscher ohlin trade model we show these elasticities depend on inter country differences in relative factor endowments and inter sectoral differences in technology this helps identify the optimal policy maker in a cu and demonstrates delegation decisions over trade policy can be integrated into mainstream trade theory the proliferation of preferential trade agreements ptas in the 1990s has presented policy analysts with a dual challenge to identify how these arrangements affect policy makers incentives to intervene in trade and to predict their implications for welfare economists responded to this challenge vigorously thanks to their research efforts a substantial body of work is now available addressing these issues under alternative assumptions regarding the theoretical environment considered including the objectives of policy makers the nature of their interactions the gatt rules that might constrain these interactions market structure the process of coalition formation etc 1 still while undeniably valuable the recent literature on regionalism has shed limited light on an important issue how heterogeneity among partners in a pta shapes their national preferences over external tariff levels and how these preferences in turn manifest themselves in the formation of actual trade

jagdish bhagwati pravin krishna and arvind panagariya eds trading blocs alternative approaches to analyzing preferential trading agreements

okun s law in panels of countries and states this article contributes to the empirical literature of okun s law in three respects first in contrast to the limited data used in the existing studies we employ two extensive across countries and across states i e within a country panel data sets to investigate the validity of okun s law second the use of the pooled mean group pmg estimator permits us not to pre filter the data as often done in the current literature and can take into account the possibility of cointegration between unemployment and output third in addition to the short run relationship or cyclical components between unemployment and output we also estimate the long run linkage between these two important variables empirical results show that unemployment and output are long run cointegrated irrespective of using country or state level data moreover the unemployment output linkages are found to be negative and highly significant both in the short and long run our results not only confirm the validity of okun s law

do professional economists forecasts reflect okun s law some evidence for the g7 countries using survey data for the g7 countries we report that professional economists forecasts of changes in the unemployment rate and the growth rate of real output are consistent with okun s law professional economists do not believe in potential asymmetries in okun s law over the business cycle they believe in the classic linear version of okun s law

multilateralism and the endogenous formation of preferential trade agreements abstract this paper examines the interaction between preferential trade agreements ptas and multilateral tariff reduction in a model of imperfect competition a growing literature finds that the formation of ptas alters the incentives for and the sustainability of multilateral tariff reduction we show that the causation is not one sided multilateral tariff reduction also affects the formation of ptas specifically tariff reduction enhances the incentives to form a pta and increases the likelihood that it is self enforcing thus each round of multilateral tariff reduction should lead to a new wave of ptas this may help to explain the current trend towards regionalism

should the wto require free trade agreements to eliminate internal tariffs abstract in a three country model of endogenous free trade agreements ftas we study the effects of requiring fta members to eliminate tariffs on one another as is essentially stipulated under current wto rules we explain why in the absence of such a requirement ftas members impose positive tariffs on each other even when maximizing their joint welfare we show that requiring fta members to eliminate internal tariffs induces them to lower their external tariffs such external trade liberalization by fta members undermines the prospects of global free trade since it reduces the non member s incentive to enter into trade agreements with them

on the dynamic properties of asymmetric models of real gnp there is now a substantial body of evidence that suggests business cycles are asymmetric however the evidence has been accumulated using a wide array of statistical techniques and consequently is based on various definitions of asymmetry this paper examines several parametric models that have been used to study asymmetries in real gnp although these models capture asymmetries in very different ways their dynamic properties are remarkably similar

exchanging market access at the outsiders expense the case of customs unions under a customs union countries can exchange preferential market access by coordinating external tariffs to shift profits from excluded countries i show that the exporting rents resulting from this coordination can offset trade diversion losses produced by the union even if its members are relatively small in world markets such gains come however at the expense of excluded countries i show that small countries can use customs unions also to foster multilateral cooperation by increasing the incentives of excluded countries to support global free trade le cas des unions douanieres dans le cas d une union douaniere les pays peuvent marchander l acces preferentiel a un marche en coordonnant leurs tarifs externes de maniere a extraire des profits des pays exclus on montre que les rentes a l exportation qui resultent de cette coordination peuvent compenser les pertes attribuables a la diversion du commerce qui decoule de l union douaniere meme si ses membres sont relativement de petite taille dans les marches mondiaux de tels gains se font cependant aux depens des pays exclus on montre que les petits pays peuvent utiliser les unions douanieres pour stimuler la cooperation multilaterale en accroissant les incitations des pays exclus a poursuivre des strategies de libre echange global

can bilateral trade agreements help induce free trade there has been growing debate about whether bilateral trade agreements are damaging multilateral efforts to eliminate barriers to international trade this paper develops a model in which trading blocs always charge optimal tariffs and make trade agreements based on strategic considerations we ask a very simple question does the fact that trading blocs can form bilateral trade agreements make free trade less likely to occur the answer is that it depends on the size distribution of the trading blocs if there is one large trading bloc along with some smaller ones then bilateral trade agreements allow the smaller trading blocs to coalesce and block the monopoly power of large trading blocs in this case bilateral trade agreements facilitate the attainment of free trade not allowing customs unions leads to more not less protection if trading blocs are of roughly equivalent size then bilateral trade agreements allow groups of trading blocs to more effectively monopolize world trade in which case they may make free trade less likely these results suggest that a policy that inhibits the formation of trading blocs may be harmful we also compute the welfare effects of trade agreements to get some idea of how empirically important these issues are

endogenous trade bloc formation in an asymmetric world this paper investigates how variations in endowments and the structure of preferences impact on the coalition formation decisions of asymmetric countries there exist relatively few general results on the relationship between country characteristics and trade bloc formation here new light is shed on this issue by systematically simulating bloc formation and by explicitly analysing the blocking behaviour of coalitions a general equilibrium model of world trade is implemented with equilibrium coalition formation being modelled using the equilibrium concept of the core it is found that global free trade is observed when all countries are similar customs unions tend to form between countries with adjacent consumer preferences or with adjacent endowments of their export commodity finally in contrast to the existing literature but consistent with observed behaviour it is found that free trade areas often pareto dominate customs unions provided consumer preferences differ sufficiently

testing for time variation in an unobserved components model for the u s economy abstract this paper analyzes the amount of time variation in the parameters of a reduced form empirical macroeconomic model for the u s economy we decompose output inflation and unemployment in their stochastic trend and business cycle gap components with the latter linked through the phillips curve and okun s law a novel bayesian model selection procedure is used to test which parameters vary over time and which components exhibit stochastic volatility using data from 1959q2 to 2014q3 we find substantial time variation in okun s law while the phillips curve slope appears to be stable stochastic volatility is found to be important for cyclical shocks to the economy while the volatility of permanent shocks remains stable

the size of trading blocs market power and world welfare effects abstract we construct an n country n commodity trade model to analyze the implications of bloc size for nash equilibrium tariffs and welfare the relationship between the absolute size of symmetric trading blocs and their market power is ambiguous and we illustrate how this relationship varies with model parameters in contrast sufficiently large increases in the relative size of a bloc enhance its relative market power and cause the welfare of its country members to rise above the free trade level we establish the existence of an optimal bloc size and study the dependence of optimal size on the parameters of the model

asymmetry in okun s law in this paper we support the proposition that the output unemployment relationship as represented by okun s law is asymmetric okun s coefficients are defined based on a dynamic model that allows for asymmetry in the relationship between cyclical output and unemployment using data from the united states for the post war period our results show that the short run effects of positive cyclical output on cyclical unemployment are quantitatively different from those of negative ones and the data are consistent with the proposition that cyclical unemployment is more sensitive to negative than to positive cyclical output several theoretical

stable multilateral trade agreements we analyse multilateral tariff negotiations as a game in coalition form in a model with three identical countries that produce and trade an homogeneous commodity and where countries aggregated welfare can weight differently their different components we analyse how changes in the countries objective affects the stability of coalitions in other words we characterize what tariff agreements if any are stable i e lie in the core

cyclical output cyclical unemployment and okun s coefficient a new approach estimates of okun s coefficient are obtained using new estimates of cyclical gnp and cyclical unemployment rates for the post war usa empirical estimates of the coefficient are near 0 25 somewhat smaller in magnitude than other recent estimates obtained applying similar econometric techniques to different estimates of cyclical output and unemployment tests fail to reject the hypothesis of parameter stability across an hypothesized break between the third and fourth quarters of 1973 suggesting similar relationships between cyclical output and unemployment both before and after the supply shocks of the 1970s

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

a strategic and welfare theoretic analysis of free trade areas abstract we construct a three country model to determine how the formation of free trade areas ftas affects optimal tariffs and welfare we find that at constant rest of the world row tariffs the adoption of internal free trade induces union members to reduce their external tariffs below the kemp wan j int econom 6 1976 95 97 level and causes row s terms of trade to improve and its welfare to rise when row also behaves optimally its policy response to the formation of the fta is to raise tariffs generally fta members prefer to liberalize internal trade partially and find regional integration appealing only if their collective size is sufficiently large we also demonstrate how ftas may undermine the attainment of global free trade

dynamic formation of preferential trade agreements the role of flexibility in practice free trade agreements ftas vastly outnumber customs unions cus nevertheless the literature traditionally views cus as optimal for members because cu members coordinate external tariffs i show that a dynamic fta flexibility benefit can help explain the prevalence of ftas individual fta members have the flexibility to form their own future ftas whereas cu members must jointly engage in future cu formation i show how the relative prevalence of ftas versus cus depends on the structure of market size asymmetry across countries and use these predictions to shed some light on fta versus cu formation in europe and south america formation dynamique d accords commerciaux preferentiels le role de la flexibilite en pratique les accords de libre echange ale sont plus nombreux que les unions douanieres ud neanmoins la litterature specialisee percoit traditionnellement que les ud sont optimales pour les membres parce qu ils peuvent coordonner leurs tarifs externes on montre qu une flexibilite dynamique de l ale peut aider a expliquer la prevalence des ale les membres des ale ont la flexibilite de former leurs propres ale dans l avenir alors que les membres des ud s engagent conjointement pour la formation des ud futures on montre comment la prevalence des ale versus les ud depend de la structure de l asymetrie de la taille entre les pays et on utilise ces previsions pour eclairer les choix entre la formation de ale et de ud en europe et en amerique du sud

testing okun s law theoretical and empirical considerations using fractional integration abstractfull employment remains at the center of any economic policy following okun s conclusion regarding the trade off relation between unemployment and real gross national product growth new s

free trade networks abstract the paper examines the formation of free trade agreements ftas as a network formation game we consider an n country model in which possibly asymmetric countries trade differentiated industrial commodities we show that if all countries are symmetric the complete fta network is pairwise stable and it is the unique stable network if industrial commodities are not highly substitutable we also compare ftas and customs unions cus as to which of these two regimes facilitates global trade liberalization noticing that unlike cus each signatory of an fta can have another fta without consent of other member countries

preferential trade agreements and multilateral tariff cooperation are preferential trade agreements ptas building or stumbling blocks for multilateral trade liberalization i address this question in an infinitely repeated tariff game between three countries engaged in intraindustry trade under oligopoly the central result is that when countries are symmetric a free trade agreement fta undermines multilateral tariff cooperation by adversely affecting the cooperation incentive of the nonmember whereas a customs union cu does so via its effect on the cooperation incentives of members however when countries are asymmetric with respect to either market size or cost there exist circumstances where ptas facilitate multilateral tariff cooperation

how reasonable are assumptions used in theoretical models computational evidence on the likelihood of trade pattern changes abstract in theoretical literature it is common to make the assumption that in a multi country multi good world the direction of trade import and export by commodity ispredetermined and fixed for each good for each country we consider a simple three country three good pure exchange model with ces preferences we compute free tradecompetitiveequilibria three countrynon cooperativenashequilibria andcustomsunionequilibria for randomised parameterizations and find that trade pattern changes betweenfree trade and customs union equilibria in around 35 of cases jel classification f10 f13 f15 jusqu a quel point est ce que les postulats utilis es dans les mod eles th eoriques sontraisonnables r esultats calcul es sur la vraisemblance de changements dans les patterns decommerce dans la litt erature th eorique sp ecialis ee il est assez commun de postuler que dans un monde a plusieurs pays et a plusieurs biens la direction du commerce impor tations et exportations ventilees par biens est pr ed etermin ee et fixe pour chaque bien etchaque pays les auteurs examinent le cas d un modele simple d echange pur a trois pays et trois biens ou les pr ef erences ont des elasticit es constantes de substitution on calcule les equilibres concurrentiels de libre echange les equilibres non coop eratifs de trois pays a la nash et des equilibres d unions douani eres pour certaines param etrisations al eatoires il semble qu il y a changement dans les patterns de commerce dans 35 des cas quand onpasse d equilibres de libre echange a des equilibres d unions douani eres

credit rationing and threshold effects in the relation between money and output the possibility that the effect of monetary policy on output may depend on whether credit conditions are tight or loose can be expressed as a non linearity in the relation between real money supply and output of which a simple case is a threshold effect in this case consistent with the credit rationing model of blinder 1987 the monetary variable has a more powerful effect if it is below some threshold than when it is above testing for the importance of this threshold is straightforward if the appropriate threshold value is known a priori but where the value is not known and must be chosen based on the sample the testing problem becomes more difficult we apply recently developed tests applicable in this situation to both us and canadian data and find substantial evidence of a threshold effect particularly in us data however the estimated threshold values are high copyright 1996 by john wiley sons ltd

tariffs and formation of free trade agreements networks this paper examines the formation of bilateral free trade agreements ftas on the basis of country heterogeneity in the tariff level we demonstrate that a country s unilateral incentive to form an fta depends on the relative magnitudes of the negative market concession effect and the positive market expansion effect both of which are determined by the tariff levels of the two fta partner countries global welfare is maximised when all country pairs form ftas two countries in equilibrium are more likely to form an fta when their tariff gap is smaller or when their tariff levels are neither very high nor very low this finding is robust to several extensions of the model our preliminary empirical analysis provides some evidence for the finding