food price transmission and economic development in this paper we challenge the conventional wisdom that the world s poorest countries are also the most vulnerable to spikes in international food prices we derive an inverted u shaped relationshi

distinguishing between equilibrium and integration in spatial price analysis this article introduces a new spatial price analysis methodology based on maximum likelihood estimation of a mixture distribution model incorporating price transfer cost and trade flow data this method permits differentiation between market integration and competitive market equilibrium and derivation of intuitive measures of intermarket tradability competitive market equilibrium perfect integration segmented equilibrium and segmented disequilibrium one can also use these estimates to derive semiparametric measures of time varying regime probabilities to track changing market conditions an application to trade in soybean meal among pacific rim economies demonstrates the usefulness of the method copyright 2002 oxford university press

nonlinear dynamics in deviations from the law of one price a broad based empirical study abstract in this paper we test empirically the validity of the law of one price using data for five major bilateral us dollar exchange rates and nine goods sectors during the recent floating exchange rate regime since the early 1970s using threshold autoregressive models we find strong evidence of nonlinear mean reversion in deviations from the law of one price with plausible convergence speeds consistent with theoretical arguments on international goods markets arbitrage under transactions costs and with an emerging strand of empirical literature these results contribute towards forming a consensus view in favor of discrete regime switching in deviations from the law of one price and the presence of differing nonzero transactions costs across a broad range of goods and countries

capital controls capital flow contractions and macroeconomic vulnerability abstract in this paper i analyze whether restrictions to capital mobility reduce vulnerability to external shocks more specifically i ask if countries that restrict the free flow of international capital have a lower probability of experiencing a large contraction in net capital flows i use three new indexes on the degree of international financial integration and a large multi country data set for 1970 2004 to estimate a series of random effect probit equations i find that the marginal effect of higher capital mobility on the probability of a capital flow contraction is positive and statistically significant but very small having a flexible exchange rate greatly reduces the probability of experiencing a capital flow contraction the benefits of flexible rates increase as the degree of capital mobility increases a higher current account deficit increases the probability of a capital flow contraction while a higher ratio of fdi to gdp reduces that probability

market institutions and price relationships the case of coffee in the ethiopian commodity exchange while the ethiopian commodity exchange ecx is widely considered a successful market institution very little rigorous empirical investigation has been done on it this paper contributes to filling this knowledge gap using a unique set of spatially disaggregated prices for five different coffee varieties we examine how the ecx has influenced the dynamics of international and domestic prices for coffee the largest traded commodity in terms of trade value on the exchange floor we follow a multivariate generalized autoregressive conditional heteroscedasticity garch approach to assess the extent of market interdependence conditional correlations and volatility transmission we also evaluate structural changes in price dynamics over time our results suggest that contrary to popular media stories the ecx s success in strengthening coffee price relationships has been limited we discuss the underlying reasons and implications of this finding

what are the farm level impacts of malawi s farm input subsidy program a critical review this article provides a critical analysis of the current frontier of research evaluating malawi s farm input subsidy program fisp whose main objectives are increasing maize production promoting household food security and enhancing rural incomes we focus on farm level studies in malawi identifying consistent and contrasting research results in order to draw important policy lessons and provide suggested avenues for future research while national production estimates suggested dramatic increases in maize production and productivity during the years of the fisp the farm level studies found relatively modest increases in maize production and yields over the same period consistent with the farm level results of modest maize production increases there has been a relative increase in real maize prices and the country continued to import maize during most of the subsidy program years furthermore there is evidence that better off households gained substantially more than poorer households when they participated in the program together these findings cast some doubt on the fisp s ability to reduce food insecurity and poverty we propose a number of policy lessons and suggestions for rigorous investigation including research that directly measures the causal impacts of the fisp program on poverty in malawi

taming capital flows abstract the argument of this paper is that growing capital mobility is unavoidable domestic financial liberalization and the revolution in information and communications technologies make it much more difficult to stop capital flows at the border effective controls will therefore have to become increasingly comprehensive onerous and distortionary the issue is therefore how to cope with the reality of high capital mobility and to manage the transition this means not freeing capital flows before substantial progress has been made in liberalizing domestic financial markets and strengthening financial supervision it means liberalizing foreign direct investment first access to stock and bond markets second and offshore bank funding last it means putting in place exchange rate monetary and fiscal policies that do not destabilize the capital account it means reforming monetary and fiscal institutions to assure the markets of the capacity to deliver desirable monetary and fiscal outcomes

examining dynamically changing timber market linkages market integration has been widely studied in the past to gain a better understanding of how different markets for the same good interact with one another traditional cointegration tests have been used to perform these analyses however these tests can only reveal the presence of stable or average long term relationships to evaluate market dynamics over time we modify a time varying smooth transition autoregressive tv star model to examine pine stumpage markets in the us south the proposed model incorporates an economic indicator and allows us to evaluate market integration as it changes throughout a specified time period the potential significance of this work is twofold first market integration can be observed as a function of an economic indicator and secondly the proposed model will allow us to draw inference about market integration at specific time points

exploitative briefcase businessmen parasites and other myths and legends assembly traders and the performance of maize markets in eastern and southern africa summary small scale assemblers are both the most vilified and least understood actors in food value chains in sub saharan africa drawing on data from kenya zambia malawi and mozambique this article explores how maize assemblers influence the market access conditions of small scale farmers assembly markets for maize are found to be highly competitive in terms of the number of traders operating and marketing margins farmers market access conditions in remote areas are particularly improved by the operation of assembly traders direct state operations in markets have sometimes unintentionally exacerbated market access conditions for farmers through their effects on rural assembly markets while smallholder farmers face important marketing challenges the brightest prospects for effectively addressing them require greater support for the development of competitive assembly markets rather than supplanting them

markets transportation infrastructure and food prices in nepal we study transportation infrastructure and food markets in nepal over the period 2002 to 2010 combining monthly price data from thirty seven local and regional markets and seven indian border markets we use a series of autoregressive models to study price determination spatial and temporal price transmission and price variance we account for district level agricultural production correcting for bi directional causality between output and prices using ground station rainfall data in addition to test hypotheses regarding the importance of transportation infrastructure we incorporate information on road and bridge density and fuel costs for both rice and wheat we find strong evidence of local price intertemporal carryover and very weak evidence of price transmission from regional central and border markets to local markets suggesting very low degrees of market integration fuel costs are positively correlated with food prices and road and bridge density are negatively correlated with prices we find evidence of asymmetric effects positive price shocks are correlated with higher subsequent price volatility compared with negative price shocks of similar magnitude roads and bridges are important for moderating price levels and price volatility in nepal s rice and wheat markets which explains roughly half of the spatial and temporal variation in price mark ups between regional and local markets

a general equilibrium model of congressional voting in this paper we specify a model in which congressmen constituents and campaign contributors simultaneously decide on behavior constituents and contributors desire to influence the voting behavior of congressmen congressmen on the other hand want to be elected and vote accordingly we empirically test this model using roll call voting on eight bills dealing with economic regulation and find support for the model our results indicate that part of the voting behavior of congressmen may be explained by noneconomic factors we also find that unions and businesses as campaign contributors are sometimes influential unions are more often influential than is business ideological factors are also important in explaining voting

the commodity terms of trade unit roots and nonlinear alternatives a smooth transition approach market price dynamics for north american oriented strand board markets are examined specifically the role of transactions costs are examined vis a vis the law of one price weekly data for the january 3rd 1995 through april 14th 2006 period are used in the analysis nonlinearities induced by unobservable transactions costs are modeled by estimating smooth transition autoregressions stars results indicate that nonlinearity is an important feature of these markets and that the parity relationships implied by economic theory are generally supported by the star models implications for the efficiency of spatial market linkages are examined by estimating generalized impulse response functions

the federal reserve the emerging markets and capital controls a high frequency empirical investigation in this paper i use weekly data from seven emerging nations four in latin america and three in asia to investigate the extent to which changes in fed policy interest rates have been transmitted into domestic short term interest rates during the 2000s the results suggest that there is indeed an interest rates pass through from the fed to emerging markets however the extent of transmission of interest rate shocks is different in terms of impact steady state effect and dynamics in latin america and asia the results also indicate that capital controls are not an effective tool for isolating emerging countries from global interest rate disturbances changes in the slope of the u s yield curve including changes generated by a twist policy affect domestic interest rates in emerging countries i also provide a detailed case study for chile

storage slow transport and the law of one price theory with evidence from nineteenth century u s corn markets abstract this paper argues that localized price spikes should be a regular feature of competitive commodity markets it develops a rational expectations model of physical arbitrage in which trade takes time and shows that inventory management plays a crucial role in the way regional prices are determined in equilibrium arbitrageurs choose export quantities to ensure inventories in the importing center regularly fall to 0 they earn enough profits from high prices on these occasions to offset small losses at other times an analysis of detailed data from chicago and new york corn markets provides empirical support for the model

legislative monopoly and the size of government if the economics profession had a fetish it would surely be competition unrestricted competition allows resources to flow to their most productive uses and maximizes the net welfare of society one of the few points virtually all modem economists would agree on is that with the possible exception of a few well defined special cases e g money production and public utilities they have never met an entry barrier they did not want to eliminate entry barriers facing potential competitors in markets reduce economic efficiency and generate social waste in a classic article tullock 2 extended this reasoning to the political process he makes the following argument lower entry barriers into politics e g lowered costs of entry into the legislature for potential entrants makes governmental decision making more competitive and tends to make p mc 2 competitive government will supply a higher level of public goods at lower tax prices taxes will therefore be lower holding other things equal in political jurisdictions which are more competitive while taxes will be higher in monopoly jurisdictions which will seek to exploit monopoly rents from taxpayers this reasoning makes the assumption that it is appropriate to model government as a kind of firm which provides public goods in exchange for tax revenues from taxpayer voters in such a setting increased competition would most likely produce increased efficiency in the provision of public goods and increase net social welfare buchanan 6 made a very different argument which while not directly intended to apply to the problem of the behavior of government may have direct bearing on those problems he was concerned with the social welfare effects of the monopolization of crime by organized criminal

capital controls on inflows exchange rate volatility and external vulnerability abstract we use high frequency data and a new econometric approach to evaluate the effectiveness of controls on capital inflows we focus on chile s experience during the 1990s and investigate whether controls on capital inflows reduced chile s vulnerability to external shocks we recognize that changes in the controls will affect the way in which different macro variables relate to each other in particular we consider the case where controls co exist with an exchange rate band aimed at managing the nominal exchange rate we develop a methodology to deal explicitly with the interaction between these two policies the main findings may be summarized as follows a a tightening of capital controls on inflows depreciates the exchange rate and b we find that a tightening of capital controls increases the unconditional volatility of the exchange rate but makes it less sensitive to external shocks

how effective are capital controls a number of authors have recently argued that in order to avoid financial instability emerging countries should rely on capital controls two type of controls have been considered controls on capital outflows and controls on capital inflows in this paper i review the historical evidence on the effectiveness of these two type of controls i argue that controls on outflows have been ineffective they are circumvented and breed corruption i also analyze chile s recent experience with controls on inflows and i argue that their effectiveness has been exaggerated

capital controls in brazil stemming a tide with a signal controls on capital inflows have been experiencing a renaissance since 2008 with several prominent emerging markets implementing them in recent years we focus on brazil which instituted five changes in its capital account regime in 2008 2011 using the synthetic control method we construct counterfactuals i e brazil with no policy change for each of these changes we find no evidence that any tightening of controls was effective in reducing the magnitudes of capital inflows but we observe some modest and short lived success in preventing further declines in inflows when the capital controls were relaxed we hypothesize that price based capital controls only perceptible effect is to be found in the content of the signal they broadcast regarding the government s larger intentions and sensibilities in the case of brazil its left of center government s willingness to remove controls was perceived as a noteworthy indication that the government was not as hostile to the international financial markets as many expected it to be

identifying the efficacy of central bank interventions evidence from australia and japan abstract using a model incorporating the endogenous relationship between exchange rates and intervention we show how a change in central bank policy can be used as an identification assumption estimating this model with simulated gmm for daily data from australia and japan we find that a us 100 million purchase appreciates the australian dollar by 1 3 1 8 but the yen by just 0 2 almost all of the impact of an intervention occurs during the day it is conducted and we confirm that central banks typically lean against the wind

spatial equilibrium and price transmission between southern african maize markets connected by informal trade policies regulating the international grain trade in southern africa sa are motivated by uncertainty regarding private sector performance and in turn private sector performance is generally constrained by the policy environment we study spatial price transmission between sa maize markets where trade is dominated by informal product flows this provides an opportunity to study private sector market performance in a largely unregulated market environment contrary to some existing evidence on the performance of sa grain markets connected by formal trade we find that informally trading markets work quite well long run price equilibrium is consistent with competitive trade price transmission is rapid and potential trade constraints have no disruptive impact on long run relationships nevertheless we do find evidence of occasionally high transfer costs that may impede informal trade flows the conclusion is that a policy focus on encouraging informal trade and lowering informal trade costs would lead to improved market performance

capital account liberalization what do cross country studies tell us capital account liberalization it is fair to say remains one of the most controversial and least understood policies of our day one reason is that different theoretical perspectives have very different implications for the desirability of liberalizing capital flows another is that empirical analysis has failed to yield conclusive results the answer another influential strand of thought contends is that this efficient markets paradigm is fundamentally misleading when applied to capital flows limits on capital movements are a distortion it is an implication of the theory of the second best that removing one distortion need not be welfare enhancing when other distortions are present

estimating policy effects on spatial market efficiency an extension to the parity bounds model the standard parity bounds model pbm is extended to allow for dynamic shifts in regime probabilities in response to changes in marketing policy the approach allows estimation of the length of the adjustment period and a statistical test for no policy effects the extended pbm is applied to maize and wheat markets in ethiopia evidence of a dynamic adjustment path is found and grain marketing reforms are found to have improved spatial efficiency in a few markets worsened it in a few others but generally to have had little effect on the spatial efficiency of ethiopian grain markets

the transmission of world maize price to south african maize market a threshold cointegration approach this article seeks to provide an explanation for the relationship between domestic maize price in south africa and world maize prices in order to evaluate comovement and transmission of world prices to domestic prices in sub sahara african countries this is done by comparing nested and nonnested models that capture different forms of nonlinearity in the price spread adopting a bayesian approach that allows for comparison of models using bayes factor we found that the relationship between south african price and world price for maize indicates the presence of nonlinearity in price transmission with three regimes that is triggered by the price spread in previous period

bargaining laws as a cause and consequence of the growth of teacher unionism this study analyzes state level data for 1959 78 to determine whether the rapid growth of teacher unionism during those years was primarily a result or a cause of the public sector bargaining laws adopted during the same period the author finds contrary to the view of some scholars that the enactment of laws requiring public sector employers to bargain with majority representatives of their employees was the single most important cause of the growth in the proportion of teachers covered by union contracts although the growth in teacher unionism in turn encouraged the adoption of some new or stronger bargaining laws this effect was relatively weak more important predictors of new bargaining laws included the extent of political patronage in a state and the bargaining laws adopted by neighboring states

the theory of economic regulation and public choice and the determinants of public sector bargaining legislation in this study we used the theory of economic regulation and public choice to derive a model to explain the pattern of public sector bargaining laws among the states we find this type of legislation is influenced by the following demand factors 1 the extent of public sector union membership which represents the interest group hypothesis has a positive influence on pro union legislation 2 the extent of employer opposition to unions as measured by unfair labor practice charges against employers in representation elections has a negative effect on bargaining laws 3 two taste variables the salaries of public employees and the percent of nonwhite employment in the state have a positive influence on these laws a result which will be surprising to many people is that the extent of private sector union membership has no significant influence on the passage of public sector bargaining legislation

public and private sector wages interactions in a general equilibrium model it is common wisdom that public sector wages are not determined in the same way as private sector wages at the same time the empirical evidence available for oecd countries finds a strong positive correlation between public and private sector wages in this paper we develop a model that is consistent with a political economy view of the determination of public sector wages and employment while being consistent with the said empirical evidence public finance constraints are crucial in booms governments expand employment and wages while in downturns lack of tax revenues forces the government to cut back the wage bill

monetary policy and welfare in a small open economy this paper analyzes optimal monetary policy in a small open economy featuring monopolistic competition and nominal rigidities it shows that the utility based loss function for this economy can be written as a quadratic expression of domestic inflation output gap and real exchange rate the presence of an internal monopolistic distortion and a terms of trade externality drives optimal policy away from domestic inflation targeting and affects the optimal level of exchange rate volatility when domestic and foreign goods are close substitutes for each other the optimal policy rule implies lower real exchange rate volatility than a domestic inflation targeting regime the reverse is true when the elasticity of substitution between goods is low

agricultural factor markets in sub saharan africa an updated view with formal tests for market failure this paper uses the recently collected living standard measurement study integrated surveys on agriculture initiative data sets from five countries in sub saharan africa to provide a comprehensive overview of land and labor market participation by agrarian households and to formally test for failures in factor markets under complete and competitive markets households can solve their consumption and production problems separately so that household factor endowments do not predict input demand this paper implements a simple theoretically grounded test of this separation hypothesis which can be interpreted as a reduced form test of factor market failure in all five study countries the analysis finds strong evidence of factor market failure moreover those failures appear general and structural not specific to subpopulations defined by gender or geography

cross country maize market linkages in africa integration and price transmission across local and global markets in order to study short run price shock propagation we model twenty seven sub saharan africa ssa domestic maize markets within a global vector autoregression framework the main purpose is to fully embed multilateral trade flows as a way to better structure local price transmission dynamics and interdependencies and get a more comprehensive picture of food price shocks propagation we found significant between country market contagion and prompt regional price shock propagation when trade connection exists yet the integration of ssa domestic maize markets within the continent and with global markets remains generally weak furthermore under regular market conditions most local price series appear to be more responsive to regional neighbors than to global shocks

the market for laws an economic analysis of legislation considerable insight into the workings of government has been gained in recent years by analyzing political behavior in the same way that economists analyze market behavior such analysis has led to at least two actually several distinguishable but often overlapping developments one might be labeled the interest group theory of government 1 4 10 11 12 16 while the second could be referred to as the economic theory of legislatures 4 5 10 15 18 the purpose of the following presentation is to combine these two theoretical developments and treat the legislative process as a market for laws then by simultaneously considering interest group characteristics and legislative production costs hypotheses concerning both the level of interest group pressure and the magnitude of legislative output are examined in particular the primary issues to be addressed are 1 what determines the number of interest groups formed in a state and 2 what impact does the number of interest groups have on the level of legislative output in the process the developing economic approach to government is extended in two directions first this study contains what appears to be the first direct empirical examination of the question of what factors lead to or limit aggregate interest group demands for legislation and second the level of interest group pressure and the constraints on or costs of legislative decision making are considered to simultaneously determine the aggregate output of the legislative process virtually all previous studies of interest group legislation examine the impact of specific interests on specific legislation 2 the following presentation is divided into five sections in addition to this introduction in order to explore the issues suggested above section ii characterizes the political process as a market in order to justify the theoretical hypotheses to be tested section iii details the theoretical

uncertainty capital flows and maturity mismatch abstract this paper explores a how the financial uncertainty generated by volatile international capital flows interacts with maturity mismatch on the balance sheets of nonfinancial firms to increase the volatility of output investment and total factor productivity tfp in emerging market economies i build a model of a small open economy in which financial frictions force firms to fund long term projects with short term debt in response to changes in the level of uncertainty regarding the availability of foreign borrowing firms adjust their long term investment contributing to the volatility of investment and output as well as generating endogenous fluctuations in aggregate productivity using data from a panel of major emerging markets i show that the volatility of portfolio debt flows negatively affects output by dampening investment while the volatility of equity flows which do not generate maturity mismatch has no effect consistent with the mechanism in the model the negative impact of capital flow volatility is larger at low levels of financial development and in industries with longer time to build lags my estimates imply that shocks to capital flow volatility account for one fifth of the excess output volatility of the emerging markets in my sample relative to a set of small open advanced economies

target zones and realignments recent contributions emphasize that the presence of exchange rate target zones has important effects on the within band behavior of exchange rates when agents are forward looking the authors find that the implications of available models are inconsistent with european exchange rate data and they suggest that the frequent realignments occurring in the period they consider may be responsible for this they construct a model in which the likelihood of a realignment in the near future increases as the exchange rate approaches the limits of its fluctuation band and show that its implications are broadly consistent with the evidence copyright 1992 by american economic association

estimating long run economic equilibria with stochastic trends an asymptotic theory is provided to analyze a menu of currently existing estimators of cointegrated systems we study in detail the single equation ecm seecm approach of hendry our theoretical results lead to prescriptions for empirical work such as specifying seecm s nonlinearly and including lagged equilibrium relationships rather than lagged differences of the dependent variable as covariates simulations support these prescriptions and point to problems of overfitting not encountered in the semiparametric approach of phillips and hansen 1990

spatial price transmission and asymmetry in the ghanaian maize market abstract this paper utilizes recently developed threshold cointegration tests that allow for asymmetric adjustment toward a long run equilibrium relationship to examine price linkages between principal maize markets in ghana unlike previous studies the approach employed here assumes that economic agents only act to move the system back to equilibrium when the deviation from equilibrium exceeds a critical threshold whereby the benefits of this adjustment exceed the costs the findings indicate that major maize markets in ghana are well integrated both the threshold cointegration and asymmetric error correction models reveal that wholesale maize prices in local markets accra and bolgatanga respond more swiftly to increases than to decreases in central market techiman prices accra prices are found to react faster than bolgatanga prices to changes in techiman market prices

on the extent of the market wholesale gasoline in the northeastern united states this paper develops the classical view of the extent of markets by introducing explicitly in the analysis the concept of arbitrage costs arbitrage or transaction costs imply that market boundaries are essentially stochastic while a set of products or regions may have binding arbitrage conditions i e may be in the same market at a given point in time they may not at another thus in defining a market the probability that a set of agents or regions would h3ve binding arbitrage conditions has to be assessed this paper develops an econometric methodology to estimate the transaction costs required to arbitrage among a given set of products as well as the probability that that set of products would be bound by binding arbitrage condi tions finally the methodology is applied to wholesale gasoline in the northeastern part of the united states address for communications pablo t spiller herbert hoover memorl l bldg 9348 stanford ca 94305

capital market liberalization economic growth and instability summary this paper reviews briefly the arguments for capital market liberalization and identifies their theoretical and empirical weaknesses this provides the foundations for the argument for intervention in short term capital flows the paper concludes with a brief discussion of the various ways in which such interventions may be implemented 2000 elsevier science ltd all rights reserved

market liberalization and integration of maize markets in malawi the paper studies the extent of market integration of maize markets in malawi in order to understand how it has been affected by market liberalization several measures of integration are introduced to analyze both the comovement of prices and the price adjustment process over time monthly retail prices of maize at eight main locations over the period january 1984 to december 1991 are considered the main conclusion is that liberalization has increased market integration

modelling trends in food market integration method and an application to tanzanian maize markets abstract pushed by increasing availability of price data and extensive market liberalisation efforts in many developing countries research on food market integration has evolved rapidly over the last two decades empirical methods to measure market integration diverged in two directions on the one hand there is the parity bounds model pbm using a switching regressions technique while on the other hand the use of threshold autoregressive tar models has been proposed this article provides a discussion on the two methods and argues that tar models are better able to capture the dynamics of the arbitrage process underlying interconnected markets furthermore we extend the standard tar model to include a time trend in both the threshold and the adjustment parameter using weekly maize price data on seven selected markets in tanzania we illustrate how both transaction cost and the speed of adjustment have changed during the nineties

what are the effects of input subsidy programs on maize prices evidence from malawi and zambia an important hypothesized benefit of large scale input subsidy programs in africa is that by raising maize production the subsidies should put downward pressure on retail maize prices to the benefit of urban consumers and the rural poor who tend to be net food buyers to inform debates related to this rationale for input subsidies this study estimates the effects of fertilizer subsidies on retail maize prices in malawi and zambia using market or district level panel data covering the 2000 2001 to 2011 2012 maize marketing years results indicate that roughly doubling the size of malawi s subsidy program reduces maize prices by 1 2 2 5 on average in zambia roughly doubling the scale of the country s subsidy program reduces maize prices by 1 8 2 8 on average the results are robust across countries and model specifications and indicate that the fertilizer subsidy programs in malawi and zambia have had a minimal effect on retail maize prices

exploring the logic behind southern africa s food crises summary government action during food crises in southern africa frequently exacerbates the problems driving food staple prices well beyond import parity we argue that an inability to make credible commitments due largely to a lack of trust between public and private sectors contributes to this dynamic empirical policy analysis can facilitate resolution only within a consultative process involving a broad range of stakeholders the policies emerging from such a process are not likely to approximate first best recommendations yet the precise policies may be less important than the fact that they exist and that main stakeholders find them credible

long run and short run co movements in energy prices and the prices of agricultural feedstocks for biofuel recent expansions in biofuel production have led to concerns about an emerging new relationship between energy prices and the prices of agricultural feedstock for biofuel we provide new econometric evidence on this relationship using common trend common cycle decompositions to estimate long run and short run co movement across various energy and agricultural prices we also test for the presence of regime changes that may alter the relationship between energy and agricultural feedstock prices under certain conditions we find that co movements between energy and agricultural feedstock prices tend to dissipate in the long run which has important implications for biofuel and food policy

local food prices and international price transmission world food prices spiked in the periods 2007 8 and 2010 11 the impact of these spikes in world food prices on local food prices and thus on local consumers is determined by the food price pass through pass through is defined as the extent to which changes in world food prices lead to changes in local food prices we examine the determinants of variation in food price pass through from global to local consumer prices in a global sample of 147 countries using fao data on world food prices and ilo data on food prices for consumers while market integration matters our study finds that income per capita is the dominant factor explaining cross country variation in pass through of food prices we estimate an elasticity of about 0 3 of pass through with respect to income per capita this means far greater price transmission of food price shocks at the commodity level to final consumers in low income countries than in high income countries the implication is that future swings in world food prices will in particular jeopardize food security in poor countries trade policy measures of market integration also affect the pass through significantly whereas infrastructure and geography measures play no significant role

a theory of competition among pressure groups for political influence this paper presents a theory of competition among pressure groups for political influence political equilibrium depends on the efficiency of each group in producing pressure the effect of additional pressure on their influence the number of persons in different groups and the deadweight cost of taxes and subsidies an increase in deadweight costs discourages pressure by subsidized groups and encourages pressure by taxpayers this analysis unifies the view that governments correct market failures with the view that they favor the politically powerful both are produced by the competition for political favors

a model of spatial arbitrage with transport capacity constraints and endogenous transport prices this article solves a high frequency model of price arbitrage incorporating storage and trade when the amount of trade is limited by transport capacity constraints in equilibrium there is considerable variation in transport costs because transport costs rise when the demand to ship goods exceeds the capacity limit this variation is necessary to attract shipping capacity into the industry in turn prices in different locations differ by a time varying amount thus while the law of one price holds it holds because of endogenous variation in transport costs

legislators and interest groups how unorganized interests get represented this paper derives a supply price for public policy using a constrained maximization model in the model three sets of agents each have preferences over outcomes organized interest groups offer campaign contributions to improve their own wealth voters offer votes to obtain outcomes closer to their most preferred outcomes and legislators seek both campaign contributions and votes to obtain reelection a given legislator s supply price for policy is shown to depend on the productivity of his effort as determined by committee assignments priority and ability and by the preferences of his unorganized constituency in the home district two extreme assumptions about the effectiveness of campaign spending in eliciting votes are used to illustrate the comparative statics properties of the model the prediction of the model is that interest groups will in general seek out legislators whose voters are indifferent to the policy the interest group seeks thus voters who do have preferences over policy are in effect represented even though they are not organized

market integration efficiency of arbitrage and imperfect competition methodology and application to u s celery this paper develops and applies a methodology to test for efficiency of interregional commodity arbitrage application of the methodology requires only time series data on prices for alternative cities regions countries or product forms yet the approach is capable of generating evidence on a number of market parameters including market integration arbitrage efficiency the magnitude of marketing margins product substitutability and competitiveness of markets estimation is based on a switching regression model with three regimes efficient arbitrage relative shortage and relative glut results from application of the model to u s celery marketing indicated significant departures from efficient arbitrage for both california and florida celery

controls on capital inflows do they work abstract this paper analyzes the effectiveness of controls on capital inflows in particular we analyze in great detail the chilean experience with the use of the unremunerated reserve requirement we examine the effects of the controls applied in chile in 1991 1998 on interest rates real exchange rate and the volume and composition of capital inflows the effects are elusive and it is difficult to pin down long run effects although after the unremunerated reserve requirement was introduced there was an increase in the interest rate differential the econometric evidence does not show it has a significant long run effect also we detect very small effects on the real exchange rate however the more persistent and significant effect is on the composition of capital inflows tilting composition toward longer maturity

threshold cointegration and spatial price transmission when expectations matter we examine the performance of the threshold cointegration approach specifically band tvecm to price transmission analysis in an explicit context where trade decisions are made based on expectation of final prices because trade takes time we find that following a standard inference strategy a large portion of three regime cases are not identified as such results show that transfer costs are systematically underestimated particularly in three regime models the speed of price transmission is also biased in three regime models furthermore inferences about occurrence of trade are poor with estimated models suggesting far lower market integration than is true in the data generating process

testing market integration a model of spatial price differentials for a tradable good is proposed which avoids the inferential dangers of received methods using static price correlations the proposed method also extracts more information on the causes of price differentials from the same data the method is illustrated using monthly rice price data for postindependence bangladesh including the very substantial regional price shocks during the 1974 famine impediments to market integration are indicated

spatial market integration in the presence of threshold effects a large body of research has evaluated price linkages in spatially separate markets much recent research has applied models appropriate for nonstationary data such analyses have been criticized for their ignorance of transactions costs which may inhibit price adjustments and thus affect tests of integration this analysis utilizes threshold autoregression and cointegration models to account for a neutral band representing transactions costs we evaluate daily price linkages among four corn and four soybean markets in north carolina nonlinear impulse response functions are used to investigate dynamic patterns of adjustments to shocks our results confirm the presence of thresholds and indicate strong support for market integration though adjustments following shocks may take many days to be complete in every case the threshold models suggest much faster adjustments in response to deviations from equilibrium than is the case when threshold behavior is ignored a large amount of empirical research has evaluated the extent to which spatially separate markets are integrated though the term is used loosely in the literature tests of market integration usually consider the extent to which shocks are transmitted among spatially separate markets the integration of markets can have important implications for price discovery and the operation of the market since persistent deviations from integration may imply riskless profit opportunities for spatial traders

multiple regime spatial price transmission with an application to maize markets in southern africa conventional threshold models of price transmission allow for different speeds of adjustment to equilibria depending on the magnitude of price differentials between markets however these models typically assume only one underlying long run equilibrium price relationship in this article we develop a framework for allowing multiple equilibria and multiple speeds of adjustment with regime separation depending on the magnitude of trade flows between regions rather than the magnitude of price differentials applying this framework to maize price transmission between south africa and zambia shows no transmission during periods of high imports when the government was heavily involved in maize importation but stronger transmission during periods of low imports when the government was not importing copyright 2012 oxford university press