to float or to fix evidence on the impact of exchange rate regimes on growth we study the relationship between exchange rate regimes and economic growth for a sample of 183 countries over the post bretton woods period using a new de facto classification of regimes based on the actual behavior of the relevant macroeconomic variables in contrast with previous studies we find that for developing countries less flexible exchange rate regimes are associated with slower growth as well as with greater output volatility for industrial countries regimes do not appear to have any significant impact on growth the results are robust to endogeneity corrections and a number of alternative specifications borrowed from the growth literature

a faith based initiative meets the evidence does a flexible exchange rate regime really facilitate current account adjustment it is often asserted that a flexible exchange rate regime would facilitate current account adjustment using data on over 170 countries over the 1971 2005 period we examine this assertion systematically we find no strong robust or monotonic relationship between exchange rate regime flexibility and the rate of current account reversion even after accounting for the degree of economic development and trade and capital account openness this finding presents a challenge to the friedman 1953 hypothesis and a popular policy recommendation by international financial institutions

on monoculture and the structure of crop rotations an issue when seeking to identify rotation choice is persistence in yield enhancement and input saving carry over effects focusing on carry over length and the monoculture decision we use quasi convexity of choice functions to develop price independent and price dependent principles concerning rotation structure iowa corn soybean rotation data suggest corn has one year memory for corn soybeans in the prior year is yield increasing 16 5 bu ac and nitrogen saving 51 lb ac the hypothesis that soybean has two year memory cannot be rejected corn in the prior year two years increases yield by 7 bu ac 11 6 bu ac we simulate to find price and practice subsidy levels that support different rotations

on corporate borrowing credit spreads and economic activity in emerging economies an empirical investigation abstract we document a considerable increase in foreign financing by the corporate sector in emerging economies emes since the early 2000s mainly in the form of bond issuance and claim that it has opened up an important channel by which external financial factors can drive economic activity in these economies such claim is substantiated by a strong negative relationship between economic activity and an external financial indicator that we construct for several emes using micro level data on spreads of bonds issued by emes corporations in foreign capital markets three salient features characterize such a negative relationship first the financial indicator has considerable predictive power on future economic activity in these economies even after controlling for other potential drivers of business cycles such as movements in sovereign spreads and global financial risk among others second on average an identified adverse shock to the financial indicator generates a large and protracted fall of real output growth in these economies and up to 14 of its forecast error variance is associated to this shock lastly fluctuations in this indicator also respond strongly to shocks in global financial risk emanating from world capital markets thereby implying that changes in corporate spreads also serve as a powerful propagating mechanism of the effect of changes in global investors risk appetite in emerging markets

optimal control of locusts in subsistence farming areas abstract locust swarms hit subsistence staple crop growing households at random and are not privately controllable an aerial spraying optimal control model that supports the said households livelihood at least expected cost is therefore developed the qualitative properties of the model are analysed under economically plausible but mild assumptions the steady state comparative statics reveal that the locust swarm size and the probability of a household s crop being destroyed by a swarm decrease with the number of households yield per household and the staple crop s replacement price and increase with the marginal cost of spraying and the planner s discount rate a local comparative dynamics analysis is also conducted as it provides the necessary economic intuition behind other ostensibly anomalous steady state comparative statics results

bond finance bank credit and aggregate fluctuations in an open economy corporate sectors in emerging markets have noticeably increased their reliance on foreign financing presumably reflecting low global interest rates the evidence also shows a rebalancing from bank loans towards bonds to study these developments we develop a dynamic open economy model where these modes of finance are determined endogenously the model replicates the stylized facts following a drop in world interest rates in particular rebalancing towards bonds occurs because bank credit becomes relatively more expensive reflecting the scarcity of bank equity more generally the model is suitable for studying interactions between modes of finance and the macroeconomy

managing currency pegs the combination of a fixed exchange rate and downward nominal wage rigidity creates a real rigidity in turn this real rigidity makes the economy prone to involuntary unemployment during external crises this paper presents a graphical analysis of alternative policy strategies aimed at mitigating this source of inefficiency first and second best monetary and fiscal solutions are analyzed second best solutions are prudential whereas first best solutions are not

international credit supply shocks abstract house prices and exchange rates can potentially amplify the expansionary effect of capital inflows we first set up a model of collateralized borrowing in domestic and foreign currency with international financial intermediation in which a change in leverage of global intermediaries leads to an international credit supply increase in this environment we illustrate how house price increases and exchange rates appreciations contribute to fueling the boom by inflating the value of collateral we then document empirically in a panel var model for 50 advanced and emerging countries estimated with quarterly data from 1985 to 2012 that an increase in the leverage of us broker dealers also leads to an increase in cross border credit flows a house price and consumption boom a real exchange rate appreciation and a current account deterioration consistent with the transmission in the model finally we study the sensitivity of the consumption and asset price response to such a shock and show that country differences are associated with the level of the maximum loan to value ratio and the share of foreign currency denominated credit

the impact of the global food crisis on self assessed food security the paper provides the first large scale survey based evidence on the impact of the global food crisis of 2007 08 using an indicator of self assessed food security from the gallup world poll for the sampled countries as a whole this subjective indicator of food security remained the same or even improved seemingly owing to a combination of strong economic growth and limited food inflation in some of the most populous countries particularly india however these favorable global trends mask divergent trends at the national and regional levels with a number of countries reporting substantial deterioration in food security the impacts of the global crisis therefore appear to be highly context specific

downward nominal wage rigidity and the case for temporary infl ation in the eurozone abstract since the onset of the great recession in peripheral europe nominal hourly wages have not fallen from the high levels they had reached during the boom years this in spite of widespread in

an economic analysis of the possibility of reducing pesticides in french field crops the paper aims to study the effects of reducing pesticide use by farmers in the arable sector in france and the feasibility of a policy target of reducing pesticide use by half the originality of the approach is to combine statistical data and expert knowledge to describe low input alternative techniques at the national level these data are used in a mathematical programming model to simulate the effect on land use production and farmers income of achieving different levels of pesticide reduction the results show that reducing pesticide use by 30 could be possible without reducing farmers income we also estimate the levels of tax on pesticides necessary to achieve different levels of reduction of pesticide use and the effect of an incentive mechanism combining a pesticide tax with subsidies for low input techniques

monetary policy and exchange rate volatility in a small open economy we lay out a small open economy version of the calvo sticky price model and show how the equilibrium dynamics can be reduced to a simple representation in domestic inflation and the output gap we use the resulting framework to analyse the macroeconomic implications of three alternative rulebased policy regimes for the small open economy domestic inflation and cpi based taylor rules and an exchange rate peg we show that a key difference among these regimes lies in the relative amount of exchange rate volatility that they entail we also discuss a special case for which domestic inflation targeting constitutes the optimal policy and where a simple second order approximation to the utility of the representative consumer can be derived and used to evaluate the welfare losses associated with the suboptimal rules

on becoming more flexible exchange rate regimes in latin america and the caribbean abstract this paper examines the shift from fixed to more flexible exchange rate regimes among countries in latin america and the caribbean in contrast to most traditional approaches the one followed here recognizes that fixed rates can be and often are adjusted but argues that policy makers incur a political cost from devaluation at the same time flexible exchange rates even managed ones may be very volatile with persistent misalignment a stylized model of regime choice is developed based on the perceived losses from exchange rate misalignment incurred under fixed versus more flexible regimes the model is estimated for a sample of 24 countries over the period 1978 1992 and empirical results are quite supportive misalignments proxied by current account deficits and moderate to high rates of inflation were associated with a move to more flexible rates during 1978 1986 misalignment indicators appear to have mattered less during 1987 1992 however there appears to have been a major reduction in the perceived difficulty of managing flexible rates during this period the paper then cautions against attributing differences in economic growth between groups of countries to their exchange regime the central point here is that the endogeneity of regime choice introduces selection biases into the samples of countries with fixed and with more flexible exchange regimes

wage rigidities and labor market adjustment in europe based on an ad hoc firm level survey on wage and pricing policies conducted in a large number of european countries this study finds that about 60 of firms change base wages once a year with some clustering of wage changes observed in january differences in the frequency of wage changes between firms are mainly attributable to the institutional framework of the labor market in which they operate there is evidence of both nominal and real downward wage rigidity moreover when facing a negative shock european firms prefer to reduce the amount of labor rather than cutting wages among those that decide to cut wages a majority prefers to cut flexible wage components rather than base wages the rigidity of base wages is largely explained by fairness and efficiency considerations jel e24 j30

an economic analysis of soybean integrated pest management the type of pest management strategy a farmer chooses is influenced by the amount of risk associated with alternative strategies this paper examines the attractiveness of alternative pest management strategies used on a representative virginia soybean farm probability distributions of net revenue associated with alternative pest control options are simulated and then compared using generalized stochastic dominance criteria results suggest risk averse and in some cases risk preferring farmers would prefer strategies which incorporate an integrated pest management approach to pest control rather than one which relies completely on chemical pest control

panel discussion price stability how should long term monetary policy be determined these comments address the question of monetary strategy as distinct from monetary tactics they are not directed at the question of what monetary policy is appropriate at the present time or of how monetary policy should be determined at any specific point as a function of prevailing conditions instead the issue i take is one that has been of increasing interest to economists in recent years what should be the long terrn objectives of the monetary authority increased interest in this issue as opposed to the issue of fine tuning the economy reflects the general intellectual consensus that has emerged on two points first what the monetary authority surely can control in the long run is the growth rate of nominal income second issues of dynamic consistency and commitment are crucial to the design of appropriate monetary policies beyond its recognition of these points my view is that most of what the academic economics community has had to say on the issue of long run monetary strategy has been tangential at best and i fear that many of the papers at this conference have not done much to improve the situation i wish to advance four propositions about monetary policy and to discuss their implications first an optimal tax theory has little or nothing to do with sensible inflation policy second positive rates of inflation are almost certainly desirable third to an important extent institutions do the work of rules and monetary rules should be avoided instead institutions should be drafted to solve time inconsistency problems fourth h j res 409 the proposed zero inflation amendment is a good idea if it is not taken too seriously or too literally but is instead viewed as a device for strengthening the independence of the federal reserve system my first proposition is that the connection between optimal tax theory and infla

globalization and its challenges rudi was born and grew up in krefeld germany he was an undergraduate at the university of geneva and completed his ph d at the university of chicago in 1971 which is where we met he was a student of robert mundell and both the subject matter the development of the mundell fleming model and the elegance and insights of his early work reflected mundell s influence he taught at the university of rochester and at the university of chicago before accepting an offer from mit in 1975

banking crises and exchange rate regimes is there a link the authors investigate the links between banking crises and exchange rate regimes using a comprehensive data set that includes developed and developing countries over the last two decades in particular they examine whether the choice of exchange rate regime affects the likelihood cost and duration of banking crises empirical results indicate that adopting a fixed exchange rate diminishes the likelihood of a banking crisis in developing countries but once a banking crisis occurs its real costs in terms of forgone output growth are higher for countries with more stringent exchange rate requirements the duration of crises seems not to be affected by exchange rate policy instead it is influenced mainly by the size of the credit boom before the crisis

marketing margins and the welfare analysis of food price shocks abstract following the surge in world food prices of 2007 2008 there has been a revival of short run household welfare analysis that seeks to understand whether food price increases are beneficial or detrimental for households for a number of reasons including lack of data in some instances the short run analytical approach has embedded an assumption of equal percentage price changes for consumers and producers this assumption implies that food marketing costs change by the same percentage because an x percent change in both farm prices and consumer prices implies that there must also be an x percent change in their difference but this paper shows that most marketing costs are fixed not proportional and further that assuming proportional marketing costs leads to a bias towards finding negative impacts of higher food prices the magnitude of the bias is shown to be greater than that from failing to incorporate supply and demand responses to price changes and can be substantial relative to the effect estimated without incorporating the bias in addition the bias is not necessarily uniform across income classes thus failure to explicitly consider marketing margins has the potential to reverse the relative magnitudes of the impact on rich and poor

does inflation targeting help reduce financial dollarization we examine whether adopting an inflation targeting regime helps reduce financial dollarization as predicted by ize and levy yeyati s 2003 portfolio model to address the self selection problem of policy adoption we apply a variety of propensity score matching methods to a large sample of 106 developing countries for the years 1985 2004 we find strong evidence that inflation targeting has large and significant treatment effects on lowering both actual financial dollarization and the model implied minimum variance portfolio dollarization our results are robust to alternative samples and model specifications and also to control for additional factors in postmatching regressions

classifying exchange rate regimes deeds vs words abstract most of the empirical literature on exchange rate regimes uses the imf de jure classification based on the regime announced by the governments despite the recognized inconsistencies between reported and actual policies in many cases to address this problem we construct a de facto classification based on data on exchange rates and international reserves from all imf reporting countries over the period 1974 2000 which we believe provides a meaningful alternative for future empirical work on the topic the classification sheds new light on several stylized facts previously reported in the literature in particular we find that the de facto pegs have remained stable throughout the last decade although an increasing number of them shy away from an explicit commitment to a fixed regime hidden pegs we confirm the hollowing out hypothesis but show that it does not apply to countries with limited access to capital markets we also find that pure floats are associated with only relatively minor nominal exchange rate volatility and that the recent increase in the number of de jure floats goes hand in hand with an increase in the number of de facto dirty floats fear of floating

exchange rate regimes and current account adjustment an empirical investigation the acceleration in the formation of global imbalances in the period preceding the last financial crisis prompted a revival of the debate on whether exchange rate regimes affect the flexibility of the current account i e its degree of mean reversion as originally proposed by friedman 1953 i analyse this relation systematically using a panel of 180 countries over the 1960 2007 period i find robust evidence that flexible exchange rate arrangements deliver a faster current account adjustment among non industrial countries additionally i try to identify channels through which this effect could be taking place the results suggest that exports respond to expenditure switching behaviour by consumers when faced with changes in international relative prices configuring a potential channel

why are grain legumes rarely present in cropping systems despite their environmental and nutritional benefits analyzing lock in in the french agrifood system grain legume plants fix atmospheric nitrogen in the soil and thus do not need nitrogen fertilizers therefore grain legumes can potentially decrease global warming as nitrogen fertilization is responsible for half of all agricultural greenhouse gas emissions moreover grain legumes have many functional and nutritional properties both as feed and food despite the fact that the european union has granted considerable subsidies to promote grain legume cultivation their production continues to fall and there has been no satisfactory explanation as to why this study provides an answer by showing that a situation of technological lock in has resulted from the co evolution of crop systems based on an agrochemical paradigm public policies and market dynamics that promote cereals this process began with the historical choice by european and french public institutions to relegate grain legumes to feed in direct competition with imported soybeans moreover interrelated factors such as breeding selection public subsidies and food systems have favored increasing returns to adoption for cereals to the detriment of grain legumes finally the evolutionary economics approach used here identified several actions that must be implemented together such as agricultural cost accounting methods nitrogen management institutional innovations and market outlets to promote grain legumes and move towards more sustainable agriculture

dynamics of rice prices and agricultural wages in the philippines rice trade liberalization in the philippines should decrease domestic rice prices impacting both agricultural wages and the welfare of agricultural wage earners this study examines the short run and long run relationship between rice prices and agricultural wages in the philippines using a neoclassical wage determination model three empirical frameworks are used a cointegration error correction framework which assumes nonstationary variables in long run equilibrium a first difference model that assumes nonstationary variables but no long run equilibrium and an ols framework that assumes the model variables are stationary conclusions are reasonably robust across the three empirical frameworks with wages adjusting positively to rice price changes with a short run elasticity of 0 29 to 0 57 and a long run elasticity of 0 70 to 1 0 in preferred models an analysis of welfare implications suggests that although households that are heavily reliant on agricultural wages for income will be adversely affected by rice price decreases other households will benefit

food prices wages and welfare in rural india this paper considers the welfare and distributional consequences of higher relative food prices in rural india through the lens of a specific factors general equilibrium trade model applied at the district level the evidence shows that nominal wages for manual labor both within and outside agriculture respond elastically to increases in producer prices that is wages rose faster in rural districts growing more of those crops with large price run ups over 2004 09 accounting for such wage gains the analysis finds that rural households across the income spectrum benefit from higher agricultural commodity prices indeed rural wage adjustment appears to play a much greater role in protecting the welfare of the poor than the public distribution system india s giant food rationing scheme moreover policies like agricultural export bans which insulate producers as well as consumers from international price increases are particularly harmful to the poor of rural india conventional welfare analyses that assume fixed wages and focus on households net sales position lead to radically different conclusions

risk induced resource dependency in capacity investments a capacity acquisition process is resource dependent when the existing resources impact the valuation of new resources and thereby influence the investment decision following a formal analysis of resource dependency we show that uncertainty and aversion to risks are sufficient conditions for resource dependent capacity acquisition distinct from the technology lock in effects of increasing returns to scale or learning risk aversion can induce diversity we develop a stochastic programming framework and solve the optimization problem by decomposing the problem into investment and operational horizon subproblems our computational results for an application to the electricity sector show inter alia that technology choices between low carbon and fossil fuel technologies as well as their investment timings are dependent upon the resource bases of the companies with scale debt leverage and uncertainty effects increasing resource dependency particularly we show that resource dependency can significantly impact the optimal investment decisions and we argue that it should be evaluated at both company and policy levels of analysis

complexity and empirical economics this article explores the state of interplay between recent efforts to introduce complex systems methods into economics and the understanding of empirical phenomena the empirical side of economic complexity may be divided into three general branches historical studies the identification of power and scaling laws and analyses of social interactions i argue that while providing useful stylised facts none of these empirical approaches has produced compelling evidence that economic contexts exhibit the substantive microstructure or properties of complex systems this failure reflects inadequate attention to identification problems identification analysis should therefore be at the centre of future work on the empirics of complexity

globalizing carbon lock in this paper extends the arguments surrounding carbon lock in elaborated in unruh energy policy 28 2000 817 30 2002 317 to countries currently undergoing industrialization it argues that for numerous reasons industrializing countries are unlikely to leapfrog carbon intensive energy development on the contrary carbon lock in may be globalizing and could further constrain climate change mitigation options it is then argued that many policy recommendations ignore carbon lock in possibly limiting their potential for successful implementation the paper then discusses four policy approaches that appear to have advantages given lock in conditions it is recognized however that relative ease of implementation does not necessarily equate with superiority instead it is merely a path dependent outcome of past development decisions pursuing policies on the basis of relative implementation ease may help address the issue of climate change but could also result in sub optimal outcomes along other dimensions of sustainable development

estimating the short run poverty impacts of the 2010 11 surge in food prices global food prices have increased substantially since mid 2010 as have prices in many developing countries in this study we assess the poverty impact of the price changes between june and december 2010 in twenty eight low and middle income countries this is done by gathering detailed information on individual households food production and consumption levels for thirty eight agricultural and food commodities to assess the impacts on household welfare this study estimates that this sudden food price surge increased the number of poor people globally but with considerably different impacts in different countries the heterogeneity of these impacts is partly related to the wide variation in the transmission of global prices to local prices and partly to differences in households patterns of production and consumption on balance the adverse welfare impact on net buyers outweighs the benefits to net sellers resulting in an increase in the number of poor and in the depth of poverty we estimate that the average poverty change was 1 1 percentage points in low income countries and 0 7 percentage points in middle income countries with a net increase of 44 million people falling below the 1 25 per day extreme poverty line

agricultural wages in bangladesh what the figures really show the impact of the green revolution on poverty has been the subject of much concern and fears that it leads to impoverishment have affected many people in a position to influence agricultural policy real agricultural wages rates have been used as an indicator of poverty in the absence of more direct measurements this article starts by examining two recent studies of the trends and regional variations of real agricultural wage rates in bangladesh both of which argue that agricultural growth has not been favourable to real wage rates one concludes that there has been an alarming downward trend since the mid 1960s and the other that the contribution of technological change to labour demand has not been strong using more recent information and re working the original data it appears that these conclusions cannot be supported

monetary policy in emerging markets can liability dollarization explain contractionary devaluations abstract in emerging markets external debt is denominated almost entirely in large developed country currencies such as the u s dollar this liability dollarization offers a channel through which exchange rate variation can lead to business cycle instability when firms assets are denominated in domestic currency and liabilities are denominated in foreign currency an exchange rate depreciation worsens firms balance sheets which leads to higher capital costs and contractions in capital spending to illustrate this i construct a quantitative sticky price small open economy model in which a monetary policy induced devaluation leads to a persistent contraction in output in this model fixed exchange rates offer greater stability than an interest rule that targets inflation

network externality an uncommon tragedy economists have defined network externality and have examined putative inframarginal market failures associated with it this paper distinguishes between network effects and network externalities where the latter are market failures the authors argue that while network effects are important network externalities are theoretically fragile and empirically undocumented some network externalities are merely pecuniary network ownership or transactions among network participants can internalize some network effects the type of market failure that has been associated with these externalities is a transition problem that has little to do with externality

smart policies to reduce pesticide use and avoid income trade offs an agent based model applied to thai agriculture abstract policy makers in developing countries need better evidence of how changes in pesticide regulation would affect pesticide reduction and farm incomes but there are very few modeling tools that can provide such information the present study develops a new model based on mathematical programming based multi agent system mpmas a simulation software that allows assessing ex ante the impact of alternative pesticide use reduction strategies including combinations of pesticide taxes the introduction of integrated pest management a price premium for safe agricultural produce and subsidies for biopesticides the model is parameterized with farm and plot level data from northern of thailand where the adoption of high value cash crops has been accompanied by a rapid increase in synthetic pesticide use simulation results suggest that a pesticide tax alone has little effect on synthetic pesticide use a smart policy package combining integrated pest management a progressive pesticide tax based on toxicity and subsidies lowering the price of biopesticides can reduce average use of hazardous pesticides by 34 over current levels without adverse effects on the average farm income

tortoises and hares choice among technologies of unknown merit recent work in the area of competing technologies and increasing returns has largely been concerned with the effectiveness of the market in delivering optimal outcomes the existence of inefficient market outcomes suggests that there might be a place for intervention in the technology choice process this paper develops a model of sequential choice in which the choice process is subject to centralized control the model is used to show that intervention can increase the expected present value of the technology adoption process it remains however that one technology and not necessarily the best will come to dominate the market copyright 1991 by royal economic society

terms of trade and exchange rate regimes in developing countries abstract since friedman essays in positive economics university of chicago press chicago 1953 157 203 an advantage often attributed to flexible exchange rate regimes over fixed regimes is their ability to insulate more effectively the economy against real shocks i use a post bretton woods sample 1973 96 of 75 developing countries to assess whether the responses of real gdp real exchange rates and prices to terms of trade shocks differ systematically across exchange rate regimes i find that responses are significantly different across regimes in a way that supports friedman s hypothesis the paper also examines the importance of terms of trade shocks in explaining the overall variance of output and prices in developing countries

good bye financial repression hello financial crash some unintended consequences of financial liberalization in latin america are analyzed in this paper intrinsic imperfectious in financial markets and the policy dilemmas they pose are reviewed first the stylized facts of southern cone experiments in financial liberization are then presented alternative ways of organlzing domestic capital markets under latin american conditions are discussed and an eclectic reform mongering program is proposed

transition pathways revisited established firms as multi level actors in the heavy vehicle industry abstract the multi level perspective on sustainability transitions positions established firms incumbents as defenders of existing technologies at the regime level by contrast it positions new entrants at the niche level as promoters of new technologies this paper challenges the positioning of firms as actors on either regime or niche levels based on a comparative analysis of technology strategies in the heavy vehicle industry the paper shows that established firms are active at both levels developing several technology alternatives simultaneously this means that incumbents technology strategies determine important parts of the required niche regime interactions the paper also shows how incumbents may pursue contrasting technology strategies while some adopt a dualistic approach keeping regime and niche level activities technologically and commercially separate others develop integrated strategies where niche activities are leveraged to impact upon the regime level the cases studied illustrate how the success of such integrated strategies depends on the emergence of bridging policies bridging policies are relevant both for linking early niche markets to broader regime level markets and for supporting further technological advancements of niche markets

food prices and poverty do higher food prices help or hinder poverty reduction despite much debate existing research has almost solely relied on simulation models to address this question in this paper world bank poverty estimates are used to systematically test the relationship between changes in poverty and exogenous changes in real domestic food prices the paper uncovers indicative evidence that increases in food prices are associated with reductions in poverty not increases a likely empirical explanation is the relatively strong agricultural supply and wage responses to food price increases and the fact that the majority of the world s poor still heavily rely on agriculture or agriculture related activities to earn a living

when to dollarize implicit in the debate over dollarization are two very different views of the sequencing of policy measures one view is that dollarization to work smoothly and yield more benefits than costs must wait on the completion of complementary reforms the other view is that dollarization need not wait on these other reforms because the very act of dollarizing will produce the changes needed to smooth the operation of the new regime in this paper i consider these arguments as they apply to the cases of labor market reform fiscal reform and financial sector reform i conclude that neither theory nor evidence suggests that removing all scope for an independent monetary policy will necessarily accelerate the pace of reform

determinants of exchange rate regime switching abstract exchange rate policy in many emerging markets shifts between a stronger and weaker commitment to peg this observation raises the following questions which we address in our paper does intervention policy exhibit switching and if so what causes policy to shift the theoretical literature increasingly points to the critical importance of financial fundamentals chinn m d kletzer k m 2001 imperfect information domestic regulation and financial crises in glick r moreno r spiegel m eds financial crises in emerging markets cambridge university press cambridge pp 196 237 dooley 2000 chang r velasco a 2005 monetary policy and the currency denomination of debt a tale of two equilibria kennedy school of government working paper series harvard university cambridge massachusetts among others direct empirical validation to date is limited however although relevant intuitions come from duration and indicators literature kaminsky g l reinhart c m vegh c a 2004 when it rains it pours procyclical capital flows and macroeconomic policies nber macroeconomics annual national bureau of economic research inc domac i peria m s 2003 banking crises and exchange rate regimes is there a link journal of international economics 61 41 72 tudela m 2004 explaining currency crises a duration model approach journal of international money and finance 23 799 816 we use a panel of quarterly data starting 1985 through 2004 for 14 countries mainly from latin america and east asia and adopt a novel two step empirical strategy first we apply regime switching methods to two simple indices of central bank exchange rate policy this generates likelihoods of high and low intervention in the second step we establish the variables that determine these probabilities we find strong evidence that the economy s balance sheet and economic performance determine the likelihood of switching in the exchange rate regime specifically an increase in reserve currency debt relative to assets raises potential capital losses from devaluation and reduces the probability of switching to a low intervention regime as does a decline in growth the purpose here is not to present an alternative regime classification levy yeyati e sturzenegger s 2005 classifying exchange rate regimes deeds vs words european economic review 49 1603 1635 reinhart c m rogoff k 2004 the modern history of exchange rate arrangements a reinterpretation quarterly journal of economics available at http www puaf umd edu faculty papers reinhart papers htm but to establish the relative importance of different constraints on the central bank which has policy implications the empirical approach and specification is flexible to whether intervention is discrete or gradual and to whether or not the central bank sterilizes

imperfect mobility of labor across sectors and fiscal transmission abstract our paper investigates the sectoral effects of government spending shocks and highlights the role of labor mobility our var evidence for sixteen oecd countries reveals that a shock to government consumption by 1 of gdp increases non traded value added by 0 7 of gdp and generates a decline in traded value added the value added share of non tradables rises by 0 35 of gdp thus implying that the reallocation of resources accounts for 50 of the sectoral fiscal multiplier consistently our estimates show that the non traded sector is highly intensive in the government spending shock and experiences a labor inflow the shift of hours worked toward the non traded sector is however subject to mobility costs which vary across countries when we explore quantitatively the sectoral effects of a shock to government consumption that is highly intensive in non traded goods we find that the model can replicate the magnitude of the rise in the share of non tradables we document empirically once we allow for both labor mobility and capital installation costs financial openness also matters as it further biases the demand shock toward non tradables to account for the cross country dispersion in the responses of sectoral shares we estimate empirically we have to let the degree of labor mobility vary across countries

old age government transfers and the crowding out of private gifts the70 and aboveprogram for the rural elderly in mexico old age public transfers and remittances

financial crises in asia and latin america then and now in this paper we analyze the extent to which past financial crises share common characteristics in latin america asia europe and the middle east we examine the recent crises in asia and in latin america in particular their severity to assess whether the considerable historical differences that we have documented for the earlier sample have eroded we conclude that in a deregulated world the well behaved asian financia1 crises are a relic of the past

the real output losses associated with modern banking crises this study investigates the real output losses associated with modern banking crises we find a remarkable diversity of experience in a number of instances banking crises have not been associated with any significant reduction in the growth of real per capita gdp often this has been the case in mature and developed economies on the other hand estimated output losses are extremely large for some other countriesnamounting to several years of lost gdp interestingly such large losses can be associated with banking crises that were designated as non systemic our sample mean and median output loss estimates are also big for the average sample country the estimated present discounted value of crisis related output losses is bounded between 63 and 302 of real per capita gdp in the last year before the crisis onset average loss estimates are this large primarily because we find evidence that post crisis economic slowdowns often persist long after the crisis is officially over such delayed costs have been largely overlooked in previous empirical work and resultantly our loss estimates are much larger than those that have appeared elsewhere

is the exchange rate regime really irrelevant for external adjustment we argue that evidence on whether floating exchange rates facilitate external adjustment is contradictory because existing regime classifications do not adequately capture exchange rate flexibility relevant to external adjustment using a trade weighted bilateral exchange rate volatility measure we show that exchange rate flexibility indeed matters for current account dynamics

the size of banking crises in credible fixed exchange rate regimes abstract since monetary policy is constrained in fixed exchange rate regimes we should observe fewer banking crises due to moral hazard in countries with credible currency pegs however three countries with seemingly credible pegs in the nineteen eighties and nineties namely china hong kong and argentina still suffered crises in their domestic banking sectors the present note illustrates that bank incentives to take on excess risk still exist in countries with currency peg credibility and that the size of that risk exposure and thus the potential for crisis may be positively related to the level of central bank foreign exchange reserves

the economics of networks a survey of the empirical literature network effects the increase in value of consuming a product if many other consumers use the same product are a feature of many markets and in particular of many high technology products this paper surveys the burgeoning empirical literature that has developed especially during the last years after theoretical work dominated the earlier years of research in this area newer research has combined theoretical models with empirical studies and applied work with direct implications for public policy marketing and company strategies furthermore insights from the study of social networks have been applied to analyse how consumers interact with each other the paper argues that a closer analysis of the network structure of consumer interaction promises fruitful future research avenues and advances in our understanding of how network effects operate copyright 2009 blackwell publishing ltd

the economics of biotechnology under ecosystem disruption abstract economic analysis of chemical pesticide use has shown that the interactions between plants pests damage control technology and state of the ecosystem are important variables to be considered hence a bio economic model was developed for the assessment of bt variety and pesticide based control strategies of the cotton bollworm in china the model simulates plant growth the dynamics of pest populations and of natural enemies the model predictions are used as major inputs for a stochastic micro level profit model of alternative control strategies results show that 1 productivity effects of bt varieties and pesticide use depend on the action of natural control agents and 2 the profitability of damage control measures increases with the severity of ecosystem disruption the findings highlight the importance of the choice of the counterfactual scenario in the assessment of the impact of agricultural biotechnology also some doubts are raised whether the high benefits of bt cotton varieties claimed by previous studies based on cross section comparisons are realistic

output costs currency crises and interest rate defence of a peg central banks typically raise short term interest rates to defend currency pegs higher interest rates however often lead to a credit crunch and an output contraction we model this trade off in an optimising first generation model in which the crisis may be delayed but is ultimately inevitable we show that higher interest rates may delay the crisis but raising interest rates beyond a certain point may actually bring forward the crisis due to the large negative output effect the optimal interest rate defence involves setting high interest rates relative to the no defence case both before and at the moment of the crisis

global credit supply shocks and exchange rate regimes abstract the recent global financial crisis has re emphasized the need for better understanding the relation between the type of exchange rate regime err in place and the effects of global credit supply shocks recent advances in the measurement of such shocks and their large realizations in the recent financial crisis produce a suitable quasi natural experiment for studying this relation toward this end i use err classification data for a panel of 40 emerging market economies emes to establish the following main findings output responds significantly more adversely to contractionary global credit supply shocks in the fixed err than in the non fixed err deleveraging and the fall in imports are much more severe in the fixed err and the lack of exchange rate depreciation in the fixed err is accompanied by a stronger fall in exports these results are broadly consistent with predictions from models which include both the expenditure switching channel and the balance sheet channel of exchange rate depreciation where the latter channel effectively becomes expansionary rather than contractionary as commonly thought owing to favorable effects of the expenditure switching channel on balance sheets asset side

business cycles and the exchange rate system some international evidence this paper investigates the differences in time series behavior of key economic aggregates under alternative exchange rate systems we use a postwar sample of 49 countries to compare the behavior of output consumption trade flows government consumption spending and real exchange rates under alternative exchange rate systems pegged floating and cooperative systems such as the ems we then examine evidence from two particular episodes involving canada and ireland of changes in the exchange rate system aside from greater variability of real exchange rates under flexible than under pegged nominal exchange rate systems we find little evidence of systematic differences in the behavior of macroeconomic aggregates or international trade flows under alternative exchange rate systems these results are of interest because a large class of theoretical models implies that the nominal exchange rate system has important effects on a number of macroeconomic quantities

exchange rate regimes in the modern era fixed floating and flaky this paper provides a selective survey of the incidence causes and consequences of a country s choice of its exchange rate regime i begin with a critical review of michael klein and jay c shambaugh s 2010 book exchange rate regimes in the modern era and then proceed to provide an alternative overview of what the economics profession knows and needs to know about exchange rate regimes while a fixed exchange rate with capital mobility is a well defined monetary regime floating is not thus it is unclear whether it is theoretically sensible to compare countries across exchange rate regimes this comparison is quite difficult to make empirically it is often hard to figure out what the exchange rate regime of a country is in practice since there are multiple conflicting regime classifications more importantly similar countries choose radically different exchange rate regimes without substantive consequences for macroeconomic outcomes like output growth and inflation that is the profession knows surprisingly little about either the causes or consequences of national choices of exchange rate regimes but since the consequences of these choices are small understanding their causes is of only academic interest jel e52 f33

exchange rate flexibility and credit during capital inflow reversals purgatory not paradise abstract we identify periods of capital inflows reversals looking at both gross and net capital flows and document the behavior of macro and credit variables in economies with different degrees of exchange rate flexibility we find that more exchange rate flexibility moderates credit swings during capital flow cycles mainly because it is associated with milder credit growth during the boom flexibility however cannot completely shield the economy from a credit reversal we observe what we dub as a recovery puzzle credit growth in economies with more flexible exchange rate regimes remains tepid well after the capital flow reversal takes place this results stress potential complementarity of macro prudential policies with the exchange rate regime more flexible regimes could help smoothing the credit cycle through capital surcharges and dynamic provisioning that build buffers to counteract the credit recovery puzzle in contrast more rigid exchange rate regimes would benefit the most from measures to contain excessive credit growth during booms such as reserve requirements loan to income ratios and debt to income and debt service to income limits

the economic determinants of the choice of an exchange rate regime a probit analysis abstract probit models were used to analyze the choice of exchange rate regimes by developing countries in the period 1977 1995 the results show the preeminence of criteria postulated in the theory of optimum currency areas i e individual structural characteristics

are we overestimating the negative impact of higher food prices evidence from ghana most studies of the welfare impact of higher food prices adopt deaton s approach based on the first order effect of prices changes using income and expenditure survey data this paper explores the impact of higher maize and food prices in ghana and considers the sensitivity of results to changes in several assumptions if second order effects are included incorporating household response to price changes the welfare impact of food price increases is more positive but only modestly so however if we assume that marketing margins are constant in real terms rather than proportional to prices the welfare impact is substantially more positive these findings highlight the need for more research on the behavior of marketing margins under volatile prices

barriers to formal saving micro and macroeconomic effects this paper examines different barriers to formal saving considering various interventions and their possible effects at microeconomic and macroeconomic levels it presents a comprehensive review of the literature based on a detailed classification of the barriers associated with supply side factors related to access to financial products and demand side barriers related to the use and frequency of use of those products the paper concludes that this classification and analysis contributes to a fuller understanding of the question of financial inclusion and how to achieve it

are government spending multipliers greater during periods of slack evidence from 20th century historical data a key question that has arisen during recent debates is whether government spending multipliers are larger during periods of slack some researchers and policymakers have argued that while government spending multipliers are estimated to be modest on average they might become greater during times when resources are underutilized auerbach and gorodnichenko 2012 forthcoming henceforth ag test this hypothesis and find larger multipliers dur

competing technologies and market dominance standard battles in the local area networking industry the rise of fast ethernet as the dominant standard for high speed connection in the local area networking industry is chosen to study the interaction between increasing returns to adoption and technical change in innovation diffusion contrary to most of the empirical papers on diffusion with increasing returns which study competition between an entrenched technology and a new competitor the focus is on the case in which several and different versions of a new technology are competing at the same time for market dominance within this context this article studies under which conditions an early technology may fail to capitalise on its initial time advantage and a new version without a clear early lead may become dominant in particular we will consider a case in which the initial time advantage is made ineffective by consistently adverse technological expectations then we analyse how the arrival on the market of different categories of buyers sensitive to specific applications further contribute to weaken the early leader and strengthen a competing version this is more likely to occur when buyers are highly familiar with the characteristics of that specific version copyright 2008 oxford university press

policies influencing cleaner production the role of prices and regulation abstract low prices of inputs low costs associated with non product outputs and poor regulatory forcing have often not been conducive to diffusion of cleaner production however developments may be noted in the field of taxation subsidies liability and permits that tend to be more favourable to cleaner production extension thereof may favour cleaner production more in the future cleaner production stands to gain much by slashing subsidies and substantial ecotaxation of inputs and non product outputs similarly the regulatory enforcement of best available technologies liability for waste and tradable permits may help the diffusion of cleaner production

innovation systems and inertia in r d location norwegian firms and the role of systemic lock in abstract this paper seeks to enquire why firms ceteris paribus tend to concentrate their r d activities at home using a systems of innovation si approach we argue that r d inertia is associated with structural inertia and resultant systemic lock in interaction within an si is a self reinforcing mechanism which may or may not lead to ex post efficiency lock in can be efficient when technologies and institutions maintain the competitiveness of firms on the other hand radical innovations or technological discontinuities may require new institutions and resources but systemic lock in may prevent rapid reaction firms can use a voice strategy by intervening to modify the appropriate institutions in the existing si or an exit strategy by seeking alternative si which more closely fit their needs in the case of norway two groups of firms exist group a benefit from a systemic lock in these are large firms in traditional sectors which are highly embedded and around whom the norwegian si has been built these firms engage in voice and loyalty group b are in science based sectors for whom lock in results in inefficiencies and use exit slowly expanding r d abroad to seek competences in technologies not available domestically

financial crises and exchange rate policy this paper studies exchange rate policy in a small open economy model featuring an occasionally binding collateral constraint and fisherian deation the goal is to evaluate the performance of alternative exchange rate policies in sudden stop prone economies the key element of the analysis is a pecuniary externality arising from frictions in the international credit markets which creates a trade o between price

global rice trade competitiveness a shift share analysis changes in country shares of global rice exports from 1997 to 2008 are analyzed using an econometric shift share analytical framework this framework estimates growth rates and disaggregates these rates of change into geographical structure effects and performance effects the performance effect is further decomposed into two subeffects accounting for adaptation to changes in the geographical structure of the marketplace and a competitiveness effect a restricted weighted two way fixed effects model is specified for estimating the geographical structure and performance effects results indicate a growing concentration among a few exporting countries in the global rice market and the competitiveness effect is often significant government policies affecting rice trade and the competitiveness of trading partners are important factors for the shifts in rice trade patterns in particular vietnam is an emerging major player in global rice trade in competition with thailand

downward nominal wage flexibility real or measurement error this paper presents a new method to correct for measurement error in wage data and applies this method to address an old question how much downward wage flexibility is there in the united states we apply standard methods developed by bai and perron to identify structural breaks in time series data applying these methods to wage histories allows us to identify when each person experiences a change in nominal wages the length of the period of constant nominal wages is left unrestricted and is allowed to differ across individuals as are the size and direction of the nominal wage change we apply these methods to data from the survey of income and program participation the evidence we provide indicates that the probability of a cut in nominal wages is substantially overstated in data that are not corrected for measurement error

sprayed to death path dependence lock in and pest control strategies theoretical literature on the economics of technology has emphasized the effects on technological trajectories of positive feedbacks in a competition among technologies that all perform a similar function the presence of increasing returns to adoptions can force all but one technology from the market furthermore the victor need not be the superior technology this paper provides an empirical study of one technological competition which illuminates this theoretical work it uses theoretical results to explain why chemical control of agricultural pests remains the dominant technology in spite of many claims that it is inferior to its main competitor integrated pest management copyright 1996 by royal economic society

exchange rate regimes and wage comovements in a ricardian model with money we construct a ricardian model of trade with money and trade costs the model predicts that the nominal wages of the trading countries exhibit stronger positive comovements when the countries fix their bilateral exchange rates while comovements of real wages are not affected by exchange rate regimes our numerical experiments suggest that a reduction in trade costs increases both nominal and real wage comovements regardless of regimes when downward nominal wage rigidity is introduced nominal wage comovements under the fixed regime remain stronger than under the flexible regime and the difference is smaller on the shorter time horizon while a slight difference in real wage comovements between the two regimes shows up and is larger on the shorter time horizon when we consider membership in the economic and monetary union of the european union as a fixed exchange rate regime panel regression results based on data from oecd countries are broadly consistent with our model and numerical experiments

agent based spatial models applied to agriculture a simulation tool for technology diffusion resource use changes and policy analysis abstract this paper presents a spatial multi agent programming model which has been developed for assessing policy options in the diffusion of innovations and resource use changes unlike conventional simulation tools used in agricultural economics the model class described here applies a multi agent cellular automata ca approach by using heterogeneous farm household models and capturing their social and spatial interactions explicitly the individual choice of the farm household among available production consumption investment and marketing alternatives is represented in recursive linear programming models adoption constraints are introduced in form of network threshold values that reflect the cumulative effects of experience and observation of peers experiences the model s economic and hydrologic components are tightly connected into a spatial framework the integration of economic and hydrologic processes facilitates the consideration of feedback effects in the use of water for irrigation the simulation runs of the model are carried out with an empirical data set which has been derived from various data sources on an agricultural region in chile simulation results show that agent based spatial modelling constitutes a powerful approach to better understanding processes of innovation and resource use change

traps and sustainable development in rural areas a review summary the concept of a poverty trap commonly understood as a self reinforcing situation beneath an asset threshold has been very influential in describing the persistence of poverty and the relationship between poverty and sustainability although traps and the dynamics that lead to traps are defined and used differently in different disciplines the concept of a poverty trap has been most powerfully shaped by work in development economics this perspective is often constraining because as many studies show poverty arises from complex interactions between social and environmental factors that are rarely considered in development economics a more integrated understanding of poverty traps can help to understand the interrelations between persistent poverty and key social and ecological factors facilitating more effective development interventions the aim of this paper is to provide a critical appraisal of existing trap conceptualizations in different disciplines and to assess the characteristics and mechanisms that are used to explain poverty traps in rural contexts thereby broadening the traps concept to better account for social ecological interactions complementarities and tensions among different disciplinary perspectives on traps are identified and our results demonstrate that different definitions of traps share a set of common characteristics persistence undesirability and self reinforcement yet these minimum conditions are not sufficient to understand how trap dynamics arise from complex social ecological interactions to broaden the utility of the concept we propose a more social ecologically integrated definition of traps that includes four additional considerations cross scale interactions path dependencies the role of external drivers and social ecological diversity including these wider dimensions of trap dynamics would help to better account for the diverse social ecological feedbacks that produce and maintain poverty traps and could strengthen strategies to alleviate poverty in a more integrated way

bad eggs learning by doing and the choice of technology we model long run economic development through technology adoption under scientific uncertainty about environmental effects there are four possible long run equilibria in a socially planned economy high growth adopt rapidly but abandon damaging technologies once revealed ddt cfcs cautious brake the introduction of new technologies to avoid mistakes genetically modified organisms no growth halt technological progress to preserve secondary knowledge and collapse adopt rapidly without ever abandoning damaging technologies in the base parameterization a short sighted social planner chooses the cautious strategy a far sighted planner chooses the high growth strategy unless damages are irreversible in which case the cautious strategy again dominates regulatory options in the market economy are investigated pollution taxes do not affect the firm s level of precaution if they can only be applied after the adopting firm has reaped the benefits however they do encourage the abandonment of damaging technologies liability rules do affect precaution but may lead to excessive caution or even a no growth trap

agricultural wages in bangladesh what do the figures really show using new data and a different model palmer jones 1993 has questioned the conclusions of boyce and ravallion 1991 concerning the evolution over time of agricultural wages in bangladesh i argue that palmer jones s model is unconvincing and that the main conclusions of boyce and ravallion are far more robust than he suggests wages respond sluggishly to rice prices bangladesh s limited agricultural growth has not raised the real wage rate which was on a downward trend for most of the 1960s and 1970s the mid 1980s saw higher real wages though this cannot yet be deemed a reversal of the previous trend

technology learning in a small open economy the systems modelling and exploiting the learning effect abstract this paper reviews the characteristics of technology learning and discusses its application in energy system modelling in a global local perspective its influence on the national energy system exemplified by norway is investigated using a global and national markal model the dynamic nature of the learning system boundary and coupling between the national energy system and the global development and manufacturing system is elaborated some criteria important for modelling of spillover 1 are suggested particularly to ensure balance in global energy demand and supply and accurately reflect alternative global pathways spillover for all technologies as well as energy carrier cost prices should be estimated under the same global scenario the technology composition co 2 emissions and system cost in norway up to 2050 exhibit sensitivity to spillover moreover spillover may reduce both co 2 emissions and total system cost national energy system analysis of low carbon society should therefore consider technology development paths in global policy scenarios without the spillover from international deployment a domestic technology relies only on endogenous national learning however with high but realistic learning rates offshore floating wind may become cost efficient even if initially deployed only in norwegian niche markets

financial openness sudden stops and current account reversals in this paper i use a panel data set to investigate the mechanics of sudden stops of capital inflows and current account reversals i am particularly interested in four questions a what is the relationship between sudden stops and current account reversals b to what extent does financial openness affect the probability of a country being subject to a current account reversal in other words do restrictions on capital mobility reduce the probability of such occurrences c does openness both trade openness and financial openness play a role in determining the effect of current account reversals on economic performance i e gdp growth and d does the exchange rate regime affect the intensity with which reversals affect real activity the empirical analysis shows that sudden stops and current account reversals have been closely related the econometric analysis suggests that restricting capital mobility does not reduce the probability of experiencing a reversal current account reversals in turn have had a negative effect on real growth that goes beyond their direct effect on investment the regression analysis indicates that the negative effects of current account reversals on growth will depend on the country s degree of trade openness more open countries will suffer less in terms of lower growth relative to trend than countries with a lower degree of trade openness on the other hand the degree of financial openness does not appear to be related to the intensity with which reversals affect real economic performance the empirical analysis also suggests that countries with more flexible exchange rate regimes are able to accommodate better shocks stemming from a reversal than countries with more rigid exchange rate regimes this abstract was borrowed from another version of this item

real wage cyclicality in the eurozone before and during the great recession evidence from micro data we study the response of real wages to the business cycle in eight major eurozone countries before and during the great recession average real wages are found to be acyclical but this reflects in large part the effect of changes in the composition of the labour force related to unemployment variations over the cycle using longitudinal micro data from the echp and silc panels to control for composition effects we estimate the elasticities of real wage growth to unemployment increases between 0 6 and 1 over the period 1994 2011 composition effects have been particularly large since 2008 and they explain most of the stagnation or increase in the average wage observed in some countries from 2008 to 2011 in contrast at a constant labour force composition in terms of education and experience the figures indicate a significant decrease in average wages during the downturn particularly in countries most affected by the crisis overall there is no evidence of downward nominal wage rigidity during the great recession in most countries in our sample

the modern history of exchange rate arrangements a reinterpretation we develop a novel system of reclassifying historical exchange rate regimes one key difference between our study and previous classifications is that we employ monthly data on market determined parallel exchange rates going back to 1946 for 153 countries our approach differs from the imf official classification which we show to be only a little better than random it also differs radically from all previous attempts at historical reclassification our classification points to a rethinking of economic performance under alternative exchange rate regimes indeed the breakup of bretton woods had less impact on exchange rate regimes than is popularly believed

urban wage behaviour and food price inflation in ethiopia abstracttheoretically increases in food prices could benefit the poor by increasing the demand for unskilled labour and hence their wages this paper tests this hypothesis in urban ethiopia we exploit a unique panel of monthly price and wage data from 111 urban markets to first construct welfare relevant measures of real wages before employing various panel estimators to formally test wage food price integration we find moderate rates of long run adjustment to increases in food prices but that adjustment is very slow this implies highly adverse short run welfare impacts of higher food prices on the urban poor

the dynamic implications of increasing returns technological change and path dependent inefficiency this paper addresses the issue of path dependent selection and inefficiency counterfactual methods and the empirical evidence employed in this research trajectory the general message is basically that the theoretical argument to prove path dependent inefficiency is relatively straightforward while empirical demonstrations as well as the analysis of welfare implications are much more difficult in the first section we briefly state the basic argument explaining how localized learning leads to an incomplete exploration of the variety distribution of a technology we then synthesize the most interesting historical studies which get potential regret results and ask whether these results suggest a large welfare loss to try to answer this question we start from the critical arguments of liebowitz and margolis to discuss the theoretical and empirical difficulties of establishing path dependent inefficiency