scale economies perverse comparative statics results the marshallian stability and the long run equilibrium for a small open economy abstract using a simple general equilibrium model we show that the perverse comparative statics results can occur under scale economies these paradoxes disappear iff the equilibrium is marshallian stable and the latter holds iff it is a stable long run equilibrium under capital adjustment

producer services comparative advantage and international trade patterns we unite the theories of factor abundance and monopolistic competition to explore the general equilibrium relations between trade in producer services economies of scale and factor markets in our model two final goods are produced using capital labor and a variety of differentiated producer services that are produced under increasing returns to scale we analyze the implications for comparative advantage and trade in goods between two countries that differ in factor endowments and in technology of service provision moreover we use the concept of the integrated world equilibrium to investigate trade in goods and services also when services require foreign direct investments

variable returns to scale and the global correspondence principle in the theory of international trade abstract the global correspondence principle is applied to obtain global theorems on the price output response and the rybczynski and stolper samuelson effects for an economy with variable returns to scale the marshallian output adjustment process is used to obtain these results

free entry and regulatory competition in a global economy abstract this paper examines the optimal entry policy toward oligopoly in a global economy we show that free entry results in too much competition for the world but each country s corrective tax policy unless internationally coordinated proves suboptimal because of international policy spillovers thus globalization prevents countries from pursuing the optimal entry policy however globalization also generates the gains from trade when countries are small the gains from trade dominate the losses from a suboptimal entry policy but as markets grow the result is reversed making trade inferior to autarky therefore the need for tax harmonization grows as the world economy grows this paper also contributes to the international tax competition literature through the discovery of the reverse home market effect

discount rates and credit markets theory and evidence from rural india three models of credit markets 1 the permanent income model 2 upward sloping credit supply to individual borrowers and 3 constrained credit due to imperfect enforcement are tested using credit market data and an experimental study of individuals discount rates in south india the permanent income model is rejected by both the discount rate and the credit market data the discount rate data are consistent with either of the other two models while the credit market data are consistent with a combination of these two models other explanations are found to be insufficient to explain the results of this study

scale economies in factor supplies international trade and migration this paper incorporates externalities generated by human capital into the heckscher ohlin samuelson framework to examine the patterns of international trade and migration individuals endowed with different levels of human capital choose to become either unskilled or skilled workers national scale economies with respect to human capital play an important role in endogenously determining these factor supplies and yield a number of interesting patterns of trade and migration migration could reinforce comparative advantage both skilled and unskilled workers could migrate in the same direction

crop prices and the demand for titled land evidence from uganda abstract i investigate how agricultural prices affect demand for titled land using panel data on ugandan farmers and a price index that weighs international crop prices by the structure of land use at the sub county level higher prices increase farmers share of titled land i also present evidence of a positive impact of prices on agricultural incomes the effect of prices on land tenure is stronger when farmers have access to roads and markets when they have undertaken investment on the land and when households fear land grabbing

property rights and consumption volatility evidence from a land reform in vietnam summary during vietnam s transition from a socialist to a market economy household s property rights over agricultural land were considerably strengthened through a land certification program this resulted in active formal credit and land markets either of which potentially affects consumption levels and volatility this article evaluates the program impact with respect to consumption outcomes in particular it identifies the channel of impact through which improved property rights affect consumption volatility we find that land certification increases consumption levels for rural households but also consumption volatility for a subgroup of households identified by an instrument we show that the certification program affects consumption outcomes of this subgroup through presumably more risky credit based agricultural investment at the intensive margin

globalisation and the spatial concentration of production new trade theory models predict that freer trade increases the spatial concentration of industrial production across countries while nations with large home markets and central geographical location become increasingly attractive business locations small peripheral countries gradually deindustrialize using data for 26 industries 20 oecd countries and 20 years we investigate the empirical validity of this claim separating out the role of home market size from geographical factors and using various panel methods we find robust evidence in line with theory freer trade has indeed magnified the importance of domestic demand and geographical location for the pattern of industrial production across the globeand has therefore exacerbated spatial disparities

public expenditure international specialisation and agglomeration abstract it is widely recognised that public sector purchasers tend to favour domestic suppliers we study the consequences of such home biased public procurement on international specialisation using a general equilibrium model with a monopolistically competitive sector we find that a country will specialise in that sector if it has relatively large home biased procurement the pull effect furthermore home biased procurement can counter agglomeration forces in that sector and thereby attenuate the overall degree of international specialisation the spread effect our empirical analysis conducted on input output data for the european union yields supporting evidence for the pull effect and some support for the spread effect

competing for capital when labor is heterogeneous this paper investigates the impacts of capital mobility and tax competition in a setting with imperfect matching between firms and workers the small country always gains and the large country always loses from tax competition thus implying tax competition leads to redistribution from the large to the small country however the large country always attains a higher utility than does the small country these results imply that our model encapsulates both the importance of being small as well as the importance of being large we also show that tax harmonization leads to redistribution from the large to the small country

production trade and migration with differentiated skilled workers a model is developed in which the output of one traded sector e g high tech is produced using consultants who supply differentiated skilled services an external economy is shown to exist which in turn implies a the suboptimal supply of skilled specialists b multiple equilibria and c disadvantages for small and or late developing economies although the results indicate a positive role for subsidies the model emphasizes the need to subsidize the use not training of skilled specialists the latter policy subsidizes foreigners through emigration production commerce international et migration dans un contexte ou laforce de travail est qualifieze et differenciee l auteur developpe un modele dans lequel la production dans un secteur ofu les biens sont transiges internationalement haute technologie requiert l usage de consultants qui fournissent des services qualifies et differencies on montre l existence d economies externes qui font que a il y a offre sous optimale d experts qualifies b des equilibres multiples existent et c les petites economies ou celles qui se sont developpees tardivement sont desavantagees bien que les resultats indiquent que les subventions peuvent jouer un role positif le modele suggere qu il faut subventionner l utilisation et non pas la formation de specialistes qualifies cette derniere politique subventionne les etrangers via la migration

trade policy with increasing returns and imperfect competition contradictory results from competing assumptions abstract a number of recent papers derive different results about the effects of trade and industrial policy on imperfectly competitive industries this paper sets out a single model within which policy under different market structures can be examined we consider the four types of market structure generated by oligopoly versus free entry and segmented markets versus integrated markets we conclude that the effects of policy are greater when markets are segmented than when they are integrated and that if transport costs are small policy is more potent when the number of firms is fixed than when there is free entry

evaluating the impact of mexico s land reform on agricultural productivity abstract in mexico land reform law and the terms of credit access suggest a priori that farmers in the land reform ejido sector should be less productive than private farmers analysis of studies comparing the productivity of individual ejido parcels and small private holdings however reveals no significant difference between the two sectors between tenure categories there is a de jure but not a de facto difference in small farmers control over resources partly because farmers circumvent restrictions implicit in the land reform the case for formal privatization of the ejido sector may be less compelling than has been suggested

the effects of land sales restrictions evidence from south india abstract the effects of land sales restrictions on credit use land investment and cultivation decisions are investigated using data from two villages in south india sales restrictions are found to have little effect on credit supply and demand or demand for land improvements some household characteristics are found to affect investment demand on plots subject to sales restrictions in one village suggesting that the transactions effect of such restrictions may be inhibiting allocative efficiency however we also find that household characteristics influence investment on titled plots and that the magnitude of impact of such characteristics is greater on titled plots these results imply that sales restrictions are not a major source of inefficiency in the villages studied and suggest that the nature of village credit and land markets and enforcement of sales restrictions are critical determinants of the impacts of such restrictions

production possibilities with a public intermediate good this paper considers the shape of the production possibility set with a public intermediate good of the atmos phere type the elements which tend to give rise to a concave product ion frontier are isolated from those which tend to generate a convex one by using the notion of the production surface the results from earlier models are both generalized and sharpened

what s the point of reciprocal trade negotiations exports imports and gains from trade this paper explains why trade policy makers may prefer reciprocal trade negotiations rtn to unilateral tariff reductions utr for economic reasons it answers puzzles like why wto reciprocity and strengthens the unnecessarily weak case made for the wto by those who downplay or dismiss benefits from foreign tariff reductions ftr rtn is superior to utr because it provides economic benefits that utr cannot namely ftr benefits which are clearer than potentially important utr benefits whereas each policy offers efficiency gains any terms of trade effect of utr generally detracts from these gains while any terms of trade effect of ftr is typically beneficial especially for a small price taking country with this benefit augmenting ftr s efficiency gains moreover benefits from reductions in foreign barriers may come from several sources they are not solely the result of terms of trade improvement or economies of scale the two benefits already noted in the literature though often dismissed for example with foreign ntb elimination possible home benefits are shown even with rising costs and terms of trade deterioration rtn is also superior to utr because by eliminating protection in either ntb or tariff form rtn provides an escape from not only a terms of trade prisoners dilemma but many other previously unrecognised prisoners dilemmas including one in international rent transfers and several others with no economies of scale or terms of trade motivation of course if superior rtn is not an option utr may well be desirable if reciprocity is an option but only in a narrower cu or fta form such reciprocity may still be superior to utr or it may be inferior theory cannot unambiguously rank these

returns to scale in canadian manufacturing an interprovincial comparison this paper measures the degree of returns to scale at the two digit standard industrial classification sic in canadian manufacturing employing both gross output and value added data using a model developed by r j caballero and r k lyons the study distinguishes between internal and external returns to scale the caballero and lyons model is extended by disaggregation to the provincial level in order to measure the returns to scale of geographic provincial concentration the empirical results suggest that in canada there are increasing returns that are primarily national rather than internal to the province or the industry

a theoretical explanation of some stylized facts of economic growth this paper presents a three good two country general equilibrium model that is consistent with several stylized facts of economic growth the three goods are manufactures agriculture and services manufactures are subject to economies of scale the model predicts that services a nontraded good must be more expensive in the country with higher per capita income it also shows that as per capita income increases we should expect the productivity in commodities relative to services to rise the model is able to generate many other stylized facts of economic growth

tenure security investment and productivity in gambian agriculture a generalized probit analysis the determinants of investment input use and productivity are investigated under customary tenure in peri urban areas of the gambia a structural model is specified to investigate the role of tenure security on farm investments and input use and thereby on yield testing of the structural form hypotheses requires simultaneous equation estimation containing both continuous and discrete endogenous variables the model is estimated as a feasible generalized least squares amemiya s generalized probit some of the positive relationships hypothesized between tenure security investment and yields are corroborated in particular tenure security is found to enhance long term investments which in turn enhance yields

trade factor prices and the gains from trade with increasing returns to scale existing analyses seem to suggest that national increasing returns to scale are not a very useful tool for analysing trade owing to problems such as multiple equilibria and the tendency towards complete specialization the purpose of this paper is to construct a model in which there are in fact determinant relationships among country size the direction of trade the gains from trade and international factor price differences in the model differences in country size determine the direction of trade which in turn determines factor price differences and limits the possible distribution of the gains from trade commerce international prix des facteurs de production et les gains de l change dans un contexte de rendements croissants a l echelle les analyses conventionnelles semblent suggerer que les rendements croissants h l 6chelle au niveau national ne constituent pas une avenue prometteuse dans l analyse du commerce international parce que de tels rendements creent une presomption en faveur de la specialisation complete et conduisent a des situations d 6quilibres multiples le but de ce m6moire est de construire un mod le dans lequel il existe des rapports determinants entre la dimension du pays la direction des 6changes les gains de l echange et les differentiels internationaux entre les prix des facteurs de production dans ce mod le les differences entre les pays en termes de dimension d6terminent la direction du commerce international laquelle d6termine le differentiel entre les prix des facteurs de production et limite l eventail des r6partitions possibles des gains de l echange

introduction agricultural taxation and land rights systems this paper provides an introduction to topics that were discussed at a symposium on agricultural taxation and land rights systems in the rural sector of developing countries imperfections in risk and land markets and the limited of market transactions that can give rise to tax valuation are important constraints on tax policy and economic efficiency one of the challenges of development economics is to design policies that can economize on information costs and that build on the comparative advantages of and complementarities between state and private actions in mitigating market failures

trade and investment with constant and increasing returns to scale it has been well known since the seminal paper by mundel that in a heckscher ohlin model with constant returns to scale factor flows can be perfect substitutes for com modity trade this paper extends the analysis to differentiate between factor movements and investment and considers the possibility of trade and investment occurring simultaneously the analysis is carried out in models with constant and increasing returns to scale in the crs model it is shown that it is important whether the returns to capital are repatriated in terms of commodity x or commodity y the country well endowed with capital could export the labour intensive good and generally the pattern of trade cannot be predicted by endowment differences between countries with both investment and trade tariffs need not produce a welfare loss with irs it is shown that there can be no presumption as to the direction of investment in the no trade world trade patterns however are predictable as investment will be after trade has taken place thus the direction of investment may depend on whether trade or investment occurs first

agricultural price policy in tanzania abstract this paper examines agricultural price policy implementation and its strategic impact in tanzania over the period 1969 1980 trends in producer prices and the rural urban terms of trade are analysed by constructing weighted price and income indices for major categories of crops marketed through official channels the results indicate a substantial deterioration of real prices and incomes from crop sales during the 1970s when taken in conjunction with a concomitant deterioration in the efficiency of agricultural marketing the analysis suggests that price policy has had a major adverse impact both on peasant living standards and on the economic performance of tanzania since the mid 1960s

multinationals multi plant economies and the gains from trade a general equilibrium model of a multinational enterprise based on economies of multi plant operation is developed these economies are modelled as arising from the existence of a joint input whose productivity in each production facility is independent of the number of facilities maintained by a firm the multinational thus offers the world increased technical efficiency by eliminating the duplication of the joint input that would occur with independent national firms since this technical efficiency may come at the expense of increased market power the full determinants of home country host country and world welfare are considered

managerial versus production wages offshoring country size and endowments we explore the role of trade in differentiated final goods as well as offshoring of tasks for inequality both within and between countries emphasizing the distinction between managerial and production labour we extend grossman and rossi hansberg 2012 where task trade is driven by external economies of scale by considering asymmetric endowments identifying possible equilibrium patterns of task trade we find little scope for two way trade if endowments are asymmetric our numerical simulations identify non monotonicities between the level of offshoring and measures of within country as well as between country inequality remunerations des gestionnaires et des travailleurs delocalisation taille du pays et dotation de facteurs on explore le role du commerce de biens differenciees finaux ainsi que celui de la delocalisation des t ches dans l explication de l inegalite a la fois intra et entre pays en mettant l accent sur la distinction entre travail de gestion et travail de production on developpe le modele de grossman et rossi hansberg 2012 ou le deplacement des t ches est enclenche par les economies d echelle externes en considerant les dotations asymetriques de facteurs en identifiant les patterns d equilibres possibles du deplacement des t ches on trouve peu de possibilite pour un commerce bilateral si les dotations sont asymetriques des simulations numeriques identifient des relations non monotones entre le niveau de delocalisation et des mesures d inegalites intra pays ou entre pays

a test of trade theories when expenditure is home biased we develop a criterion to distinguish two dominant paradigms of international trade theory constant returns perfectly competitive models and increasing returns monopolistically competitive models our analysis makes use of the pervasive presence of home biased expenditure it predicts that countries relative output and their relative home biases are positively correlated in increasing returns sectors the home bias effect while no such relationship exists in constant returns sectors this discriminating criterion turns out to be robust to a number of generalisations of the baseline model our empirical results suggest that the increasing returns model fits particularly well for the mechanical and electrical engineering industries which account for close to half of manufacturing output

increasing returns and the gains from trade it is known that gains from trade are positive in the presence of increasing returns to scale if all increasing returns industries expand in the shift from autarky sufficient conditions for gains when some increasing returns industries expand and others contract suffer from the limitations that the production frontier must be convex changes must satisfy a prespecified hierarchical pattern or that total factor supplies must be fixed between equilibria conditions which can not generally be assured this paper develops a necessary and sufficient condition for gains and from it a sufficient condition that does not depend on these restrictions copyright 1991 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

a note on the neoclassical ambiguity and the specific factor production model under variable returns to scale abstract this note investigates the relationship between commodity price changes and factor rewards in a specific factor production model that admits variable returns to scale the principal result is that in the presence of variable returns to scale the so called neoclassical ambiguity may be resolved without resorting to detailed knowledge of the mobile factor s preferences that is to say the effect of a commodity price change may as it does with the returns to those factors specific to each industry raise or lower the real reward of the mobile factor in terms of either commodity depending only on the characteristics of the technology

urbanization and underdevelopment a global study of modernization urban bias and economic dependency the causes and effects of 3rd world urbanization have been addressed in theories of modernization urban bias and economic dependency but no single cross national study has tested the arguments advanced by all 3 theories this paper uses panel regression analysis to assess the validity of the 3 perspectives in 61 underdeveloped countries between 1960 and 1980 the modernization theory asserts that industrial employment attracts people to urban areas where they work in modern sector employment that facilitates national economic expansion the urban bias theory posits that the disparity in welfare between country and city increases rural to urban migration and thereby expands both urbanization and service informal employment dependency and world system arguments assert that foreign investment promotes both urbanization and service informal labor with foreign investment in agriculture pushing farmers townward and foreign investment in urban manufacturing pulling them there results suggest that underdeveloped nations are experiencing a gradual transition from an agrarian to a service and informal economy a transformation that impedes economic expansion unfavorable agricultural conditions alone will not push rural citizens to urban areas 2 theories help explain the relationship between relatives urbanization and economic growth if future studies of urbanization and underdevelopment are going to be useful then they must transcend current theoretical and ideological particularism

up the average cost curve inefficient entry and the new protectionism abstract a two country model is developed in which each country produces one good with increasing returns the goods being perfect or imperfect substitutes with cournot nash behavior and free entry certain restrictive trade policies have effects opposite to their favorable effect under noentry assumptions import tariffs and export subsidies lead to inefficient entry that raises rather than decreases the average production cost of and price charge by the domestic industry with negative welfare consequences we argue that these predictions of our model are closely consistent with extensive canadian data on entry exit and firms responses to trade liberalization

scale economies wage differentials and north south trade abstract this paper attempts to isolate the effect of external economies of scale in production on the pattern of north south trade the results show that when the relative wage is higher in the north and only the north innovates the south produces and exports those goods with the lowest economies of scale while the remaining set of goods is produced and exported by the north production subsidies offered by the south raise southern income and welfare but if the north introduces a new set of goods the benefits of the subsidies to the south dissolve

factor income function and an oligopolistic heckscher ohlin model of international trade abstract this paper introduces a new duality concept factor income function in order to establish the factor price equalization theorem and the heckscher ohlin theorem in an oligopolistic heckscher ohlin model with increasing returns to scale

mobile capital and the home market effect most existing studies examine the home market effect hme in a framework with immobile labour as the only production factor and the assumption of a freely traded homogeneous good is known to be crucial for the hme to emerge this study explores the hme in the presence of mobile capital by use of a footloose capital model allowing for positive transport costs of the homogeneous good the mobile capital generates a channel to offset the trade imbalance of a country as a result the hme always appears for arbitrary transport costs in both sectors of differentiated and homogeneous goods la plup art des travaux existants etudient l effet du marche domestique dans un cadre d analyse ou le travail immobile est le seul facteur de production et ou le postulat d un bien homogene librement echange est considere comme un element crucial pour que l effet du marche domestique emerge ce texte explore le phenomene dans le cas ou le capital est mobile et ou on utilise un modele de capital libre comme l air avec couts de transport positifs pour le bien homogene le capital mobile engendre un canal pour compenser le desequilibre commercial d un pays en consequence l effet du pays domestique apparait toujours pour des couts de transport arbitraires dans les secteurs des biens differencies ou homogenes

factor movements and commodity trade as complements abstract several models are presented in which factor mobility leads to an increase in the volume of world trade the models share the common characteristic that the basis for trade is something other than differences in relative factor endowments these alternative bases for trade include returns to scale imperfect competition production and factor taxes and differences in production technology taken together the models suggest a more general idea the widely held notion that trade in goods and factors are substitutes is in fact a rather special result which is a general characteristic only of factor proportions models

trade costs and the home market effect most of the theoretical and empirical studies on the home market effect hme assume the existence of an outside good that absorbs all trade imbalances and equalizes wages we study the consequences on the hme of removing this assumption the hme is attenuated and more interestingly it becomes non linear the non linearity implies that the hme is more important for very large and very small countries than for medium size countries the empirical investigation conducted on a database comprising 25 indus tries 25 countries and 7 years con rms the presence of the hme and of its non linear shape

on the pervasiveness of home market effects paul krugman s model of trade predicts that the country with the relatively large number of consumers is the net exporter and hosts a disproportionate share of firms in the increasing returns sector he terms these results home market effects this paper analyses three additional models featuring increasing returns firm mobility and trade costs to assess the robustness of home market effects to alternative modelling assumptions we find strikingly similar results for two of the models that relax assumptions about the nature of demand competition and trade costs however a model that links varieties to nations rather than firms can generate opposite results

strategies to increase agricultural productivity and reduce land degradation evidence from uganda this paper estimates a structural econometric model of household decisions regarding income strategies participation in programs and organisations crop choices land management and labour use and their implications for agricultural production and soil erosion based upon a survey of over 450 households and their farm plots in uganda many factors have context specific impacts and involve trade offs between increasing production and reducing land degradation government agricultural extension and training programs contribute to higher value of crop production in the lowlands but to soil erosion in the highlands by contrast non governmental organization ngo programs focusing on agriculture and environment help to reduce erosion but have less favourable impacts on production in the lowlands education increases household incomes but also reduces crop production in the lowlands poverty has mixed impacts on agricultural production depending on the nature of poverty smaller farms obtain higher crop production per hectare while households with fewer livestock have lower crop production population pressure contributes to agricultural intensification but also to erosion in the densely populated highlands several household income strategies contribute to increased value of crop production without significant impacts on soil erosion we find little evidence of impact of access to markets roads and credit land tenure or title on agricultural intensification and crop production and land degradation in general the results imply that the strategies to increase agricultural production and reduce land degradation must be location specific and that there are few win win opportunities to simultaneously increase production and reduce land degradation

trade and the location of industries some new results abstract we study a two country two sector model with free entry and monopolistic competition where both industries use labour to produce differentiated goods the two countries are identical except for size labour is freely mobile across industries but it cannot move internationally transport costs affect both industries the location of industries and the pattern of trade are the results of the interaction of two effects the home market effect and the wage differential effect the main results are i if the two countries are sufficiently close in size and demand elasticities differ across industries transport costs being equal a continuous fall in transport costs from a prohibitive level to zero is associated with a reversal in the pattern of trade at some intermediate level for large transport costs the large country is a net exporter of the more differentiated good for lower transport costs the large country becomes a net exporter of the less differentiated good ii if the two countries are very different in size and demand elasticities differ across industries transport costs being equal the larger country is always a net exporter of the less differentiated good

precautionary saving credit constraints and irreversible investment theory and evidence from serniarid india this article investigates the extent to which poor households are discouraged from making a non divisible but profitable investment using data on irrigation wells in india we estimate the parameters of a structural model of irreversible investment results show that poor farmers fail to undertake a profitable investment that they could in principle self finance because the nondivisibility of the investment puts it out of their reach irreversibility constitutes an additional disincentive to invest simulations show that the availability of credit can dramatically increase investment in irrigation and that interest rate subsidization has little impact

increasing returns and the specific factors model in recent years trade theorists have been increasingly interested in the role of economies of scale in international trade models yet the literature to date seems to lack a simple treatment of income distribution and related issues in the presence of economies of scale the present paper attempts to fill this gap by incorporating increasing returns to scale irs into the standard specific factors model trade theorists have begun to view the specific factors model as the favored vehicle for analyzing the economy wide effects of changes in commodity prices factor endowments and other exogenous variables the strongest case in favor of this model has been presented by neary 16 who argues that the model provides a rigorous general equilibrium foundation for partial equilibrium analysis as far as the supply side of the economy is concerned whereas with icm partial equilibrium reasoning will frequently be misleading 2 he further conjectures that icm is the source of all the paradoxes which are peculiar to international trade theory with the exception of those which arise from the failure to adopt first best policies in light of these views in the literature it is of interest to investigate how robust the predictions of the specific factors model are in the presence of economies of scale the analysis in this paper has important implications for the literature on irs as well as that on the specific factors model the more important of these implications may be summarized as follows first in a small open economy characterized by national intraindustry irs the condition for local dynamic stability is equivalent to the condition for a normal output price response 3 moreover in contrast with the findings of the irs models based on free intersectoral mobility of all factors as exemplified in herberg and kemp 6 this condition may be satisfied everywhere along the production possibilities frontier second stability of an equilibrium in the presence of irs is not sufficient to guarantee the validity of many results of the standard specific factors model responses of a small

increasing returns dynamic stability and international trade abstract a simple two country two good model in which economies of scale form the basis of international trade is presented it is shown that the larger country exports the good characterized by increasing returns and imports the good subject to constant returns a key feature of the paper is a comprehensive stability analysis it turns out that a normal output price response is necessary for d stability furthermore the marshall lerner condition must be satisfied in terms of the short run import demand elasticities for local dynamic stability finally if international factor mobility is permitted cross hauling of specific factors may be observed

relative agricultural prices and the urban bias model a comparative analysis of tanzania and fiji the paper critically examines agricultural price aspects of the urban bias model especially the links between class interests government policies and the trend of real agricultural prices the paper contains an analysis of the principal factors both economic and political underlying agriculture s terms of trade in two contrasting countries tanzania and fiji both case studies in different ways raise doubts about the generality of urban bias propositions as they relate to agricultural prices they also suggest important weaknesses in the model s interpretation of the politics of farm prices

marshallian stability and long run equilibrium in the theory of international trade with factor market distortions and variable returns to scale abstract we show that perverse comparative statistics paradoxes associated with factor market distortions and variable returns to scale vanish if the equilibrium is marshallian stable and that the equilibrium is marshallian stable iff it is a stable long run equilibrium

beyond the home market effect market size and specialization in a multi country world the standard two country model of international trade with monopolistic competition predicts a more than proportional relationship between a country s share of world production of a good and its share of world demand for that same good a result known as the home market effect we first show that this prediction does not generally carry through to the multi country case as production patterns are crucially affected by third country effects we then derive an alternative prediction that holds whatever the number of countries considered this new prediction takes into account important features of the real world such as comparative advantage due to cross country technological differences and lack of factor price equalization c 2009 elsevier b v all rights reserved

factor mobility trade and welfare abstract the paper develops a north south model which is driven by scale economies in the modern sector the model predicts that skilled and unskilled labor migrate from south to north and capital migrates from north to south migration of skilled labor and capital exhibits complementarity with trade while migration of labor may exhibit complementarity or substitutability if the terms of trade effects are ignored small movements of all factors affect the welfare of the population in south negatively and of that in north positively the effects of migration on the terms of trade are ambiguous in general

industrial clusters equilibrium welfare and policy this paper studies the size and number of industrial clusters that will arise in a multi country world in which one sector has a propensity to cluster because of increasing returns to scale it compares the equilibrium with the world welfare maximum showing that the equilibrium will generally have clusters that are too small while there are possibly too many countries with a cluster allowing national governments to subsidize will move the equilibrium to the world welfare maximum so there is no race to the bottom if subsidy rates were capped then there would be a proliferation of too many and too small clusters

behavioural and material determinants of production relations in agriculture in this essay we develop a framework for analysing the major institutions governing the production and exchange of output and the primary factors of production in rural areas the analysis incorporates general considerations of risk and information constraints jointly with the principal material attributes of agriculture and of agricultural production factors the framework is used to analyse barriers to the existence of the major intertemporal and factor markets it is applied specifically to land scarce environments for which it provides an internally consistent explanation for many of the well documented institutional features of such settings in addition the analysis provides new implications for among other phenomena the inter relationships among ownership holdings operational scale family size and factor productivity for the scarcity of animal rental markets and use of animals as collateral for the renting out of land by small landowners and for the existence of plantations for certain crops

the quality income effect and the selection of location we analyze a location choice model with two vertically differentiated firms and two regions with different consumer income we find that the high quality producer settles in the poor region and the low quality one in the rich region when income disparities are sufficiently high and goods are differentiated enough this apparently counter intuitive result is not determined by technology or size issues rather it relies on the relationship between regional income disparities and product quality which we call the quality income effect

the positive theory of production externalities under perfect competition abstract aggregate cost and factor demand functions are used to develop a local envelope function which is applied in a general equilibrium model with production externalities to shed new light on the relationship between the true economy marginal costs and outputs this relationship induces a structure to the relationship between actual prices and outputs by means of the assumption of no factor demand reversals associated with externality effects we also provide generalisations of the stolper samuelson and rybczynski theorems highlighting the role of the externality effects

cash crops in developing countries the issues the facts the policies the issue of cash crops is profoundly controversial the debate uses different definitions of the term and slides across levels of analysis from the household to the international economy it also cuts across arguments crops countries and time periods this paper sets out to order the debate it deals first with definitions and taxonomy and then reviews issues connected with cash crops and a growth b distribution c food security d dependency and e the environment the paper concludes that with appropriate policies cash crops can offer a route to equitable growth