an alternative view of pricing in retail food markets the pricing mechanism of intracity retail food markets has received the attention of agricultural economists who are interested in the competitive nature of food price determination attention has focused on the information theory paradigm and potential impact of publically available comparative price reports in this paper a spatial economic model is developed to describe and analyze consumer choice seller behavior and price determination in retail food markets empirical evidence is then used to test hypotheses developed from the spatial model it is concluded that the spatial model offers added explanatory power of observed food market responses to retail price reporting

what is capital economists and sociologists have changed its meaning should it be changed back this is a pre copyedited author produced pdf of an article accepted for publication in cambridge journal of economics following peer review the version of record geoffrey h hodgson what is capital economists and sociologists have changed its meaning should it be changed back cambridge journal of economics vol 38 5 1063 86 september 2014 is available online at http dx doi org 10 1093 cje beu013

distribution of research gains in multistage production systems research irrespective of the incidence of the levy and benefits no longer is valid we have no disagreement with this important observation but we are concerned about the lack of reliable estimates of the elasticity of substitution building on muth s analysis for which we suggest some changes we explore further the sensitivity of the effects of the distribution of benefits of research to different ways in which research can impact on a multistage production system and to the effects of the elasticities

marketing order impacts on farm retail price spreads the suspension of prorates on california arizona navel oranges the 1985 suspension of the prorate on california arizona navel oranges decreased fob retail price spreads in atlanta and san francisco by about 1 3 cents per pound four reduced form models of price spreads were estimated as seemingly unrelated regressions for price spreads in atlanta dallas and san francisco nested and non nested hypothesis testing procedures indicated a markup model as the most plausible one for explaining short run changes in price spreads

likely effects on obesity from proposed changes to the us food stamp program abstract some have suggested that the us food stamp program fsp should be revised with a view to combating obesity among the poor in this paper we assess the likely impacts of allowing fsp participants to purchase only healthy foods when using food stamps our results indicate that fsp participants would probably increase their consumption of healthy food but the implications for their purchases of unhealthy food are not clear market wide consequences are even less clear because changing what may be purchased using food stamps would lead to higher prices for healthy foods and lower prices for unhealthy foods and these price effects would feed back into consumer decisions with adverse effects on consumption patterns of both participants and non participants in the fsp in addition more restrictive rules on the use of food stamps would discourage participation in the fsp we conclude that while reforming the fsp may indeed to lead to better diets among participants it is likely to be an ineffective and inefficient instrument for bringing about desired nutritional outcomes unless accompanied by additional policy instruments

size and productivity in the u s milling and baking industries from the late 1950s through mid 1990s productivity growth in u s grain milling and feed manufacturing has been consistently strong and positive in grain milling approximately 15 of the growth is due to size economies technical change has been capital using increasingly material saving and in recent years decreasingly labor saving or increasingly labor using the quality of capital has risen relative to that of labor and materials in all but the baking industry capital intensification and incentives for plant size growth remain unabated copyright 2000 oxford university press

degradation of environmental capital and national accounting procedures abstract the capital theoretic approach to the environment as a wastable stock a stock with a flow of abatement services is explored in a simple ricardo like model involving wheat production and pollution production as an essential by product we then turn to how the national accounts are implicit in growth or capital theory models and how formulae emerge for accounting for the wasting of environmental capital airsheds and watersheds from excessive use

a further look at flexibilities and elasticities relationships between price elasticities and price flexibilities are examined with emphasis on comparing sizes of difference between a directly estimated demand matrix and an inverted demand matrix results show that by using inverted elasticities to represent flexibilities or vice versa sizable measurement errors may be committed in agricultural policy and program analysis a directly estimated demand matrix should be used

evaluating generic milk promotion effectiveness with an imperfect competition model a framework is proposed for incorporating the degree of market competition in evaluating milk promotion effectiveness the imperfect competition model allows simultaneity in price and quantity with an endogenous fluid milk premium the model s usefulness is demonstrated with japanese generic milk promotion data results show a conventional exogenous price or exogenous premium model will underestimate returns to milk promotion

trust interlinking transactions and credit in the industrial district an essential feature of the industrial district is trust among individuals and firms within it this paper focuses mainly on trust based on investments in building up a good reputation that is a personal capital that can even substitute for collateral in obtaining credit informal credit often linked to other transactions and especially subcontracting is therefore an important way of financing economic development in the industrial district moreover the importance of trust as personal capital gives rise to a double financial intermediation in the industrial district this double intermediation constitutes a device to reduce information problems that are usually responsible for credit rationing c 1994 academic press inc copyright 1994 by oxford university press

distribution of research gains in multistage production systems comment in a recent paper freebairn davis and edwards hereafter fde have examined an interesting and neglected aspect of the distribution of benefits from research agricultural production is seen to comprise three stages input supply farm production and farm to retail marketing fde have explored the distribution of the benefit stemming from a downwards shift in the supply function at any one of the stages they conclude these benefits are distributed according to the elasticities of consumer demand and supply facing each stage furthermore under the special assumptions they employ this distribution is independent of which of the three supply functions is shifted by research they conclude albeit with due caution that the choice of agricultural research projects should not be limited to farm production research alone especially in view of the cost shares of purchased inputs and marketing services in the retail value of food in fact they argue they farmers may receive greater benefits from off farm oriented research than from farm oriented research p 39 this finding has potentially important implications for agricultural research policy it immediately spurs one to ask whether research funded by the farmer or the fisc might have neglected opportunities for research related to farm inputs or marketing to reach their result fde assume a all supply and demand curves are linear b research induces parallel shifts in supply curves c farmers cannot substitute nonfarm inputs for inputs supplied by farmers in production of the farm product and d marketing firms cannot substitute marketing inputs for raw farm products in the production of retail commodities the purpose of this note is to emphasize the importance of these elasticities of factor substitution in determining the distribution of research benefits between the three stages to do this we use a simple but general two factor model in which we focus attention on the elasticity of factor substitution between marketing services and raw farm products in the third stage marketing this model is not restricted to linear supply and demand curves nor to an elasticity of substitution of zero we maintain the assumptions of parallel shifts of supply curves induced by research and a perfectly elastic supply of marketing services in a revision of fde s application to the u s hog industry the distribution of research benefits is shown to depend crucially on the elasticity of factor substitution their result that such distribution is independent of the stage in which research shifts the supply curve downwards follows only for the special case in which that elasticity is zero this is clearly a restrictive assumption a reexamination of some of the policy issues raised by fde once the assumption is relaxed would seem to be warranted

a century of research on agricultural markets this article provides a perspective on major innovations in research on agricultural markets over the past century we review research on market structure and performance vertical coordination arrangements and institutions for producer collective action contributions to empirical modeling of agricultural price determination and marketing margins are also evaluated as are innovations in research on spatial market relationships and the role of storage finally we discuss contributions to understanding market information systems and the functioning of market based mechanisms for agri

industrialization and consolidation in the u s food sector implications for competition and welfare good sources for information on recent developments in food market structure include barkema drabenstott and welch u s department of agriculture 1996b and rogers my objective is not to add to this literature but rather to consider what we have learned as a profession about the rapid consolidation in food processing and distribution what are its implications for market power economic efficiency and the distribution of economic welfare among producers consumers and marketers

an equilibrium displacement approach to oligopoly market analysis an application to trade in the korean infant formula market this article uses an equilibrium displacement model edm to assess the impact of a change in trade policy in the korean infant formula market that is assumed to be oligopolistic domestic oligopolists compete in a market for a homogenous good with importing firms who enjoy the same level of market power as the domestic producers within an edm framework we investigate how the market adjusts to a new equilibrium in response to an external policy shock that improves access to foreign goods our empirical work consists of two steps we first econometrically estimate the market demand elasticity and market power parameter then using these estimates we simulate our edm model to assess the distributional effects of tariff cuts and other changes in marginal cost simulation results show that with a lower market price and increased consumption the change in consumer surplus resulting from tariff reduction is unambiguously positive but that the change in social welfare can be in either direction depending on who receives market rents associated with imports when importing firms are domestic the domestic welfare change is definitely positive however in the case of foreign importing firms the direction of the welfare change crucially depends on the demand elasticity

on monetary theory in this lecture i shall take up three topics the demand for money the implication of missing markets for the theory of asset pricing and lastly equilibrium with asymmetric information with special focus on the credit market all of these topics have been the subject of much recent work and my debt to that work will be obvious my manner of proceeding is somewhat abstract this is largely due to the circumstances of my intellectual past i simply find it easier and more likely to avoid mistakes however i shall attempt to bring out the main elements of my story without going through all of the algebra the main points derive from a single theme which in one way or another has interested me for a long time an economy which uses an intrinsically worthless means of exchange must be what radner called a sequence economy that is in contrast to an arrow debreu economy it must have trading at every date thus at the centre of monetary theory we require an economy which either makes it too costly or impossible to engage in all desirable arrow debreu trades in i97i and i973 this led me to study economies in which transaction costs were an essential element some of the results particularly on the constrained pareto inefficiency of such economies have recently re emerged in a different context and i shall discuss them later but there are other explanations for the absence of desired trading possibilities which turn on moral hazard and on adverse selection my discussion of these elements of an eventually satisfactory theory is the least satisfactory i have not found it possible either to formulate sharp propositions or to agree that those which have recently been proposed are satisfactory at the very end of this lecture i shall take a very brief look at one particular macro economic implication of my analysis much of what goes under the title of classical macro economics i find profoundly unsatisfactory i find it so not because of any keynesian pieties nor i hope because of political preferences it is the crudeness and incompleteness of the theoretical foundation which

safety and quality regulation and stage of distribution let 0 denote the level of quality inherent in a food product that is delivered to some terminal market in this paper i characterize allocations over 0 and provide an economic rationale for regulating safety and quality standards in the food system zusman and bockstael investigate the theoretical foundations for imposing standards and stress the importance of providing a tractable conceptual foundation despite a wealth of contributions that are mainly empirical for reviews of these works see respectively caswell and antle there have been relatively few attempts to model formally the linkages between farm and food markets when food quality and consumer safety are at issue here i attempt to provide such a framework building on key contributions in the theoretical literature and linking them in a simple model of quality determination in a vertically related marketing channel the food marketing model is due to gardner spence provides a foundation for pareto improving intervention in a deterministic model of quality provision and leland building on the classic paper by akerlof investigates licensing and minimum standards when the information structure is incomplete linking these ideas in a satisfactory model of the food markets is the main objective of the paper

testing hypotheses about firm behavior in the cigarette industry data on the effects of excise taxes are used to investigate the level of competition in the cigarette industry a lower bound on the numbers equivalent of firms in the context of the conjectural variations model is derived and estimated results point to at least a moderately high level of competition and in particular allow for the rejection of the perfect cartel model this paper relies on comparative statics results and hence circumvents recent criticisms of a study of monopoly behavior in the cigarette industry

measurement of monopoly behavior an application to the cigarette industry a simple scheme is proposed to measure monopoly pricing behavior the coefficient of the tax rate term in a price equation identifies the ratio of price to marginal cost no direct measurement of costs is required so a major problem for other empirical studies of monopoly is avoided empirical results for cross section time series data support rejection of atomistic competition but also provide evidence against the operation of an effective cartel in the cigarette industry the model represents an alternative interpretation of related results in a recent paper by barzel application of the methodology to other markets is feasible

joseph schumpeter and the german historical school so far schumpeter s affinities with the german historical school ghs have been inadequately acknowledged or even unexplored in major accounts of schumpeter s work this essay argues that schumpeter formulated some of his principal theses in accordance with the conceptual framework of the ghs schumpeter s affinity with the ghs is established by examining his writings and his relationship with major scholars such as schmoller max weber and sombart it is demonstrated that schumpeter s works built heavily on ghs insights and he even referred positively to the ideas of certain of its members however some obvious differences between schumpeter and the ghs are observed the paper concludes that the ghs should inspire further research in evolutionary economics

capital as a layer cake a systems approach to capital and its multi level structure abstract we elaborate a systems approach to the nature of capital that develops the work of menger and lachmann the ml trajectory we propose a layer cake metaphor to capture the kernel of the ml approach and contrast it with the neoclassical metaphor of capital as an amorphous homogeneous jelly according to the ml approach capital is combinatorial and is organized structurally and relationally the approach examines capital as it exists out there in the world as it is actually formed and experienced by entrepreneurs capital goods only exist and become productive once they are connected in entrepreneurs production plans so that the focus is upon relations of complementarity between heterogeneous capital goods as used in production hence capital has a layered structure there is a nested hierarchy of capital goods capital combinations and economy wide capital structures using bunge s theory of systems we investigate how each of these entities is a concrete system at a different layer of economic reality both capital combinations and overall capital structure arise in an irreversible causal genetic process in real time and capital structure has the added distinction of being an emergent spontaneous order

sustainable competitive advantage combining institutional and resource based views this article suggests that the context and process of resource selection have an important influence on firm heterogeneity and sustainable competitive advantage it is argued that a firm s sustainable advantage depends on its ability to manage the institutional context of its resource decisions a firm s institutional context includes its internal culture as well as broader influences from the state society and interfirm relations that define socially acceptable economic behavior a process model of firm heterogeneity is proposed that combines the insights of a resource based view with the institutional perspective from organization theory normative rationality institutional isolating mechanisms and institutional sources of firm homogeneity are proposed as determinants of rent potential that complement and extend resource based explanations of firm variation and sustainable competitive advantage the article suggests that both resource capital and institutional capital are indispensable to sustainable competitive advantage 1997 john wiley sons ltd

estimating price discounts for low quality maize in sub saharan africa evidence from benin summary this article uses household data from benin to estimate the extent that markets in sub saharan africa discount damaged maize stated preference methods indicate that a 10 increase in insect damage results in a 9 maize price discount however revealed preference methods indicate that this discount is only 3 discounts are larger immediately after harvest than they are in the lean period when maize is scarce our results help explain why many smallholder farmers sell maize at harvest rather than making the effort to preserve grain of good quality for later in the season when it may fetch a higher price

estimating the effect of unearned income on labor supply earnings savings and consumption evidence from a survey of lottery players this paper provides empirical evidence about the effect of unearned income on earnings consumption and savings using an original survey of people playing the lottery in massachusetts in the mid 1980 s the effects of the magnitude of lottery prizes on economic behavior are analyzed the critical assumption is that among lottery winners the magnitude of the prize is randomly assigned it is found that unearned income reduces labor earnings with a marginal propensity to consume leisure of approximately 11 percent with larger effects for individuals between 55 and 65 years old after receiving about half their prize individuals saved about 16 percent

why has poland avoided the price liberalization trap the case of the hog pork sector price liberalization in the agri food economy in the transition economies is likely to slip into a trap food prices rocket up consumption declines but food supply does not catch up and even contracts however during the transition period following the 1989 price liberalization the polish hog pork sector succeeded in avoiding this trap by conducting market structure and econometric analysis this article looks for the reasons for this success in the polish hog pork sector the restructuring of state owned enterprises and the emergence of private firms introduced an effective price transmission mechanism between the processing retailing and farm levels this mechanism allowed farm supply to respond to changed demand and to take advantage of increased retail prices such a relatively efficient marketing system was made possible by a relatively stable macroeconomic environment and limited government intervention

the continuing muddles of monetary theory a steadfast refusal to face facts lionel robbins was concerned about the methodology of economic science when he discussed the relationship between theory and reality two of the examples of inappropriate relationships were taken from monetary economics such shortcomings continue among the worst are 1 is lm whereby the monetary authorities set the monetary base and the interest rate is market determined 2 the monetary base multiplier of bank deposits and the role of reserve ratios 3 the current three equation neoclassical consensus assuming perfect creditworthiness and hence no need for banks 4 the analysis of the evolution of money

a general equilibrium perspective on structural change in the rural economy a research study explored innovative methods for constructing computable general equilibrium cge models for rural structural change and development policy analysis these are the make matrix the personal consumption goods industrial goods matrix the occupation industry matrix and the map distance matrix modeling the cge for rural areas requires particular attention to the results of econometric tests on economics theories especially since rural communities are demographically and economically different from urban regions

the aggregate production function is not neoclassical standard postulates concerning the aggregate production function are about marginal productivities and the associated demands for labour and capital these demands are supposed to be negatively related to the factor prices namely the wage rate and the interest rate the theoretical cases in which these neoclassical properties fail to hold are regarded as anomalies we compute the aggregate values for production capital and labour and find that the neoclassical postulates do not hold for the detailed dataset that we consider the obvious implication of this result is that the models and analysis based on the aggregate neoclassical production functions are ill founded as they are based on something that does not exist

optimal generic advertising in an imperfectly competitive food industry with variable proportions abstract this paper determines the impact of food industry market power on farmers incentives to promote in a situation where funds for promotion are raised through a per unit assessment on farm output and food industry technology is characterized by variable proportions specifically building on earlier studies by azzam am j agric econ 80 1998 76 and holloway am j agric econ 73 1991 979 muth s oxford econ papers 16 1965 221 model is extended to consider the farm level impacts of generic advertising when downstream firms possess oligopoly and or oligopsony power and advertising expenditure is endogenous at the market level applying the model to the us beef industry we find that for plausible parameter values market power reduces farmers incentives to promote however the disincentive is moderated by factor substitution and effectively vanishes as the factor substitution elasticity approaches the retail demand elasticity this suggests that the dorfman steiner theorem suitably modified to account for factor substitution suffices to indicate optimal advertising intensity in the us beef sector

a structural model of multiple welfare program participation and labor supply work on estimating the labor supply effects of high marginal tax rates in welfare programs has been hindered by the difficulty of estimating the effects of participation in multiple welfare programs simultaneously the authors solve this problem by applying methods of simulation estimation to a model of labor supply and multiple program participation the results show asymmetric wage and tax rate effects with fairly large wage elasticities of labor supply but very inelastic responses to moderate changes in cumulative marginal tax rates implying that high welfare tax rates do not necessarily induce major reductions in work effort copyright 1998 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

the farm retail price spread in an imperfectly competitive food industry in a previous article in this journal gardner investigated the effects of three distinct forces affecting food system equilibria shifts in retail demand shifts in farm commodity supply and shifts in marketing input supply he derived comparative static predictions about how the quotient of retail and farm prices the retailfarm price ratio would adjust to changes in each of these exogenous effects the investigation was conducted within a framework that

estimation of a composite food demand system for the united states this study develops statistical procedures for computing the parameters of a complete demand system a constrained maximum likelihood method has been applied and parametric restrictions derived from classical demand theory are introduced by a substitution approach the procedures are then applied to u s data for estimating a composite food demand system covering 12 food categories and one nonfood sector

a theory of rational addiction we develop a theory of rational addiction in which rationality means a consistent plan to maximize utility over time strong addiction to a good requires a big effect of past consumption of the good on current consumption such powerful complementarities cause some steady states to be unstable they are an important part of our analysis because even small deviations from the consumption at an unstable steady state can lead to large cumulative rises over time in addictive consumption or to rapid falls in consumption to abstention our theory also implies that cold turkey is used to end strong addictions that addicts often go on binges that addicts respond more to permanent than to temporary changes in prices of addictive goods and that anxiety and tensions can precipitate an addiction

welfare implications of oligopoly in u s food manufacturing a statistical procedure is used to show that increased concentration in u s food manufacturing industries is associated with increased total input productivity a price leadership model is employed in order to estimate total welfare loss if an elasticity of 1 is assumed deadweight loss to society is estimated at 0 5 of food value if an elasticity of 0 5 is assumed total loss to consumers amounts to 6 11 of food value which is 10 billion in 1975 the increase in total factor productivity which is linked to concentration is roughly sufficient to offset the entire loss to consumers

supply demand and technology in a multiproduct industry texas field crops the purpose of this paper is to examine the structure of agricultural production for six texas field crops cotton grain sorghum wheat corn rice and hay which account for nearly 95 of recent field crop value specific objectives are to a test the structure of technology to determine i if output and input utilization choices for individual products are independent of production decisions about other outputs and ii if products and or inputs can be consistently aggregated b estimate a coherent set of interrelated supply functions for the six commodities and input demand functions for fertilizer and hired labor because the empirical focus of this paper is specific to one state the results will be of limited value for interpreting specific production relationships elsewhere however the problem is of common interest in production agriculture and the techniques used demonstrate an important application of dual modeling

the kinetics of capital formation and economic organisation we examine the inseparability of capital formation and economic organisation in capitalist economic systems capital possesses a complex multilevel micro meso macro structure that is always in the process of transformation levels of the capital structure are interdependent and interactive correspondingly economic organisation at these various levels is not an independent entity in itself it occurs as a by product and structural aspect of capital formation rather than the transaction our focal unit of analysis is a production notion the capital combination that emanates from the kinetic organisation of material by human agency we consider the behaviour of entrepreneurs as causal agents in specifying and appraising potential capital combinations reorganising production and scrapping capital entrepreneurs combinatorial actions often change existing materials to serve functions for which they were not originally designed thereby changing capital structures and the shape and boundaries of economic organisation at different levels of economic complexity capital is created in a dynamic knowledge generation process that depends on entrepreneurs perceptions of gaps in the capital structure copyright the author 2012 published by oxford university press on behalf of the cambridge political economy society all rights reserved oxford university press

dynamic oligopoly in the rice export market a linear quadratic dynamic oligopoly model is used to estimate the competitiveness of the rice export market the model nests various market structures using either open loop or feedback strategies the estimated feedback model implies a less competitive market structure than the estimated open loop model the rice export market is oligopolistic but it is closer to competitive than collusive copyright 1989 by mit press

the integration of the market for soybeans and soybean products abstract this article addresses the question of whether soybeans soybean meal and soybean oil produced in the usa and exported were part of a single world geographic market during the decade of the 1980s an answer to this question is sought using an approach to defining a geographic market based on the notion of instantaneous causality the empirical results based on prices for soybeans soybean meal and soybean oil for three spatially diffuse locations suggest that there was but a single identifiable world market for these commodities over the period of study this has implications for the continued presence of soybean production subsidies and discussions on international agreements designed to reduce or eliminate these subsidies

incentives for the identification and treatment of children with disabilities the supplemental security income program abstract this paper examines how supplemental security income ssi benefit availability and generosity affect the probability that families identify health problems in their children and move onto the ssi rolls first i observe that a liberalization of ssi eligibility in 1990 was followed by a substantial re evaluation of the health status of low income children by their parents then i find that increases in ssi benefits raise the likelihood that a family identifies a chronic impairment in their child my results indicate that cash assistance targeted on children with disabilities promotes the detection and treatment of medical problems in low income children

the effect of disability payments on household earnings and income evidence from the ssi children s program abstract i estimate the effect of removing children with disabilities from supplemental security income ssi on parental earnings and household disability receipt using administrative data from the social security administration ssa i implement regression discontinuity and differencein differences designs based on changes in ssa s budget for child medical reviews i find that parents fully offset the ssi loss with increased earnings and the loss of the child s ssi payment reduces disability applications by parents and siblings but does not reduce their actual disability receipt i examine alternative hypotheses for the large parental earnings response

targeting transfers through restrictions on recipients our objective is to design transfer programs that maximize some social welfare function following the optimal income tax formulation we assume that a random process endows individuals with characteristics that influence welfare such as ability to earn income medical condition or unmonitorable income the goal is to maximize the utility of a randomly chosen individual other individualistic social welfare functions would lead to equivalent results if the random characteristics were observable a first best outcome could be achieved by making them the basis for lump sum transfers in practice however we can observe only indicators of these characteristics such as earnings medical expenditures or consumption patterns the challenge for policy is to design an efficient second best transfer program based on indicators in this paper we argue that 1 an optimal transfer program in general must sacrifice productive efficiency to target efficiency this is done by imposing restrictions on the choices made by intended beneficiaries 2 a program that incorporates restrictions such as means tested in kind transfers commodity specific taxes and subsidies and even ordeals i e the imposition of deadweight costs to qualify for a transfer will perform better than programs that rely solely on income taxes and cash transfers

the structure of food demand interrelatedness and duality this paper presents a new empirical demand system which mitigates the effects of multicollinearity while facilitating the measurement of interrelatedness duality theory is used to derive the inverse demand functions using data on fourteen food items a complete set of demand equations is estimated in both quantity and price dependent forms the model is used to test for the theoretical restrictions of homogeneity additivity and negativity as well as the habit formation hypothesis a comparison is made between these results and those of brandow and george and king

the poultry market demand stability and industry structure the stability of the demand for poultry meat and specification issues in its estimation are explored the analysis concludes that the demand for poultry meat shifted out in the early 1970s at the same time the demand relationship between poultry and pork changed from substitution to independence a second conclusion is that poultry price is predetermined for demand in annual u s data while quantity is not a predetermined price suggests several market structures exogeneity tests are performed to distinguish among them the results are consistent with a competitive constant returns to scale industry facing elastic factor supplies

distinguishing income from substitution effects in disability insurance a set of studies conducted over the last 15 years has produced a near consensus that the social security disability insurance system ssdi has substantial disincentive effects on the labor supply of near elderly males diminishing labor force participation increasing the sensitivity of labor force exit decisions to adverse economic shocks and encouraging those nearing retirement to claim disability benefits and subsequently transfer into the social security retirement program yet efforts by the social security administration ssa to encourage labor supply among the disabled by removing the work disincentives built into ssdi have been almost entirely unsuccessful most notably in 1999 congress authorized the ticket to work program which provides an array of inducements for current ssdi beneficiaries to take up employment including permitting a trial work period of up to nine months providing 7 75 years of ongoing medicare eligibility following return to work and providing three years of automatic benefit reinstatement when claimants workplace earnings fall below a threshold level each of these steps reduces the implicit tax placed on labor supply by the ssdi program despite these lures fewer than 1 400 0 01 percent of the 12 2 million tickets issued to date have led to successful workforce integration autor and duggan 2006

structural breaks cointegration and the farm retail price spread for lamb this paper examines the farm retail price spread for lamb from monthly uk data for 1979 1993 using cointegration it examines seasonal patterns in producer and retail prices and seeks to identify a long run relationship between them results show that a long run relationship exists and that the direction of granger causality is from retail to producer prices lamb prices are therefore set in the retail market results also show that there is a structural break in the relationship in january 1990 when the price increases this coincides exactly with a change in policy

consumption commitments and habit formation we analyze the implications of household level adjustment costs for the dynamics of aggregate consumption we show that an economy in which agents have consumption commitments is approximately equivalent to a habit formation model in which the habit stock is a weighted average of past consumption if idiosyncratic risk is large relative to aggregate risk consumption commitments can thus explain the empirical regularity that consumption is excessively sensitive and excessively smooth findings that are typically attributed to habit formation unlike habit formation and other theories but consistent with empirical evidence the consumption commitments model also predicts that excess sensitivity and smoothness vanish for large shocks these results suggest that behavior previously attributed to habit formation may be better explained by adjustment costs we develop additional testable predictions to further distinguish the commitment and habit models and show that the two models have different welfare implications

substance and semantics the question of capital abstract the perennial question what is capital has been getting some attention recently although the distinction between capital as a financial construct and capital as a collection of physical production goods is well known we argue that the former concept is undepreciated the two concepts are often conflated in practice and the relationship between them is seldom well understood we spell out the financial concept of capital emphasizing its importance as an indispensable instrument of calculation and accounting we consider some views of human social and other capital and how we differ from them we present reasons for rejecting the notion of an aggregate production function in standard growth theory which uses the notion of an aggregate stock of physical capital and as recently used by thomas piketty in his well known work

multiple input multiple output production choices and technology in the u s wheat region duality theory motivates a translog expected profit function consistent with multiple products price uncertainty preseason climate constraints acreage control policies and possibly nonhomothetic technology although multiple outputs are allowed enterprise specific data is not necessary instead time series measures of output revenues and expected prices input expenses and prices and fixed input flows are employed appropriate measures of elasticities of choice returns to size and biases in technological change are derived results indicated decreasing returns to size rather limited though complementary responsiveness of choices to price changes and the nature of biases in technological changes

does disability insurance receipt discourage work using examiner assignment to estimate causal effects of ssdi receipt abstract we present the first causal estimates of the effect of social security disability insurance benefit receipt on labor supply using all program applicants we use administrative data to matc

estimating market demand for fresh yam characteristics using contingent valuation implications for crop breeding and production choices this study uses the box cox bc transformations to examine nonlinearity in price modeling and compare results from several functional specifications in hedonic price analysis of yam in togo based on a sample of 6 402 observations on price and produce characteristics generated through a market experiment it is found that the bc quadratic asymmetric specification is the most suitable function several characteristics are valued more than others and prices vary across species time and market sites some residual symptoms of pest and disease damages on yam tubers reduce their market values tuber weight exhibits a diminishing marginal value and price per kilogram decreases above an optimum size therefore producers do not derive additional reward from extra large tubers we conclude that to effectively access and benefit from urban markets producers should focus on small size low weight and conical shaped tubers which are easy to process and meet the esthetic qualities preferred by urban consumers the implications for research on improved variety development to reduce poverty and for crop and resource management practices are drawn

the impact of the export enhancement programme on the soybean market in the united states this study endeavours to understand the nature and extent of the market interrelationships between the price of soybeans the price of soybean meal and oil and the crushing margin in order to assess how processors benefit relative to farmers with regard to the export enhancement programme as it applies to soybean oil the results suggest that while both farmers and processors do benefit from the programme processors benefit porportionately more than farmers receiving nearly three times the relative return of farmers from the effects of the programme this observed outcome is a function of the joint nature of the products being produced soybean meal and oil by processors and the relative less importance afforded to soybean oil in the production process in an absolute sense however the returns to soybean farmers are substantially greater than those to processors being a function of the magnitude of the price of soybeans relative to the crushing margin

varieties of capitalism some philosophical and historical considerations this is a pre copyedited author produced version of an article accepted for publication in cambridge journal of economics following peer review the version of record goeffry hodgson varieties of capitalism some philosophical and historical considerations cambridge journal of economics vol 40 3 941 960 january 2016 is available online at https academic oup com cje article lookup doi 10 1093 cje bev083

occupational structure wages and migration in late nineteenth century england and wales the relationships among occupational structure wages and internal migration in england and wales in the second half of the nineteenth century are analyzed the author concludes that socioeconomic inequalities among districts provide the major explanation for migration annotation

technology labor wars and producer dynamics explaining consolidation in beefpacking beefpacking underwent a dramatic transformation in the 1970s and 1980s as plants got much larger and industry concentration rose dramatically we use individual census bureau plant records to analyze the sources of the transformation we find that there were modest but extensive scale economies in packing plants covering the full range of plant sizes and that such economies became more important throughout the period of the study as production shifted to larger plants we estimate that the industry s aggregate processing costs fell by 35 3 by 2002 compared to what they would have been without consolidation

estimating the degree of market power in the beef packing industry a technique for assessing the degree of monopoly power developed by appelbaum 1979 1982 is extended here to permit measurement of monopsony power as well data from the u s beef packing industry are examined the results reveal small but statistically significant monopoly monopsony price distortions in slaughter cattle and wholesale beef markets but in spite of a recent trend toward heightened concentration in the industry give no indication that performance has become appreciably less competitive of late this abstract was borrowed from another version of this item

comparative statics for oligopoly demand shift effects when demand rises in an imperfectly competitive industry price output profits consumer surplus and welfare may individually rise or fall the possibilities are thus broader than with either a demand shift under competition or a cost shift in either typ e of industry systematic relationships are established showing howe ver that the pattern of effects cannot be arbitrary imperfect compe tition is necessary for profits to fall when demand rises profits alw ays rise with either perfect competition or perfect collusion this a gain contrasts with the cost shift case where imperfect competition is not necessary for perverse profit effects copyright 1988 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

price transmission and market integration vertical and horizontal price linkages for salmon relationships between prices are of interest when testing for market integration as well as analyses of supply chains a feature that has received little attention is that if two supply chains are linked by market integration at some stage then the whole supply chain will be linked furthermore the leading price in such a system can be in one supply chain and will not be revealed in market integration studies or analysis of a single supply chain an empirical analysis is provided for the supply chains for salmon which originates in norway and the united kingdom and is then sold at retail level in france as smoked salmon we find a high degree of price transmission in both supply chains as well as integrated markets

choosing brands fresh produce versus other products assuming that brands contribute to quality risk reduction prestige and design we derive and test hypothesis on the willingness to pay wtp for brands across different product categories electronics clothing packaged food and fresh produce using the random effect tobit model on the stated point value of wtp and the ordered probit model on the stated range of wtp we find that wtp for brands of fresh produce is least among the four product categories controlling for relevant demographic variations simulations show that fresh produce has a higher optimal price premium for brands but with a much smaller market share copyright 2008 oxford university press

about capital in the twenty first century in this article i present three key facts about income and wealth inequality in the long run emerging from my book capital in the twenty first century and seek to sharpen and refocus the discussion about those trends in particular i clarify the role played by r g in my analysis of wealth inequality i also discuss some of the implications for optimal taxation and the relation between capital income ratios and capital shares

the anatomy of emergence with a focus upon capital formation abstract emergence is a unifying theme of both evolutionary economics and complex systems theory in spite of this centrality emergence in economics has not been subject to an extensive critical analysis this paper remedies this deficit we identify several conditions that economic patterns i e rule systems structures must satisfy to qualify as emergent 1 material realization emergent patterns are realized in physical structures and processes 2 coherence pattern is not a mere aggregate but a systemic whole 3 non distributivity pattern possesses global properties absent from its parts 4 structure dependence systemic properties depend upon connective structure these four core features are common to all forms of emergence in economics evolutionary economic systems also exhibit extra strength versions of emergence which require that patterns possess one or more additional features 5 genuine novelty 6 unpredictability in principle and 7 irreducibility we introduce three basic forms of emergence that occur in economic systems minimal diachronic and synchronic emergence and apply these ideas to capital formation at all levels of economic order the economy wide capital structure exhibits strongly emergent properties both diachronic and synchronic that depend on its structural and functional organization it is not a mere aggregate of capital goods within the realm of capital phenomena we also compare the distinguishing characteristics of emergent and spontaneous self organizing orders we provide a case study of the iphone as an emergent capital pattern to illustrate conditions 1 7 above and the different types of emergence

correcting for measurement error in food demand estimation use of disappearance data as proxies for actual consumption causes inconsistent estimates of own price retail demand elasticities a system of equations describing consumer processor and producer behavior is used to consistently estimate the retail demand elasticity for beef using available data while avoiding the restrictive assumption of fixed input proportions implicit in disappearance data this approach yields an estimate of the own price retail demand elasticity for beef of 0 45 which is more inelastic than the estimate 0 66 obtained using a traditional approach the methodology is applicable to other food commodities for which disappearance data serve as proxies for actual consumption copyright 1993 by mit press

hedonic estimation of quality factors affecting the farm retail margin a model of the farm retail marketing margin is tested using producer and retail prices of a perishable product in which time during season and quality characteristics are variable empirical analysis verifies that the marketing margin of california fresh peaches decreases during the season and increases with improved quality results identify potential producer gains from improving product quality early in the season and from price signals compensating producers for quality characteristics other than weight

buyer preferences for sheep and goats in southern nigeria a hedonic price analysis abstract a survey of two rural markets in southwest nigeria over 14 months showed that supplies sales and prices of sheep and goats varied widely during the period with a sharp peak during the muslim festival of eid el kabir and a smaller peak during the christmas new year period local west african dwarf wad sheep and goats and northern y ankasa sheep and red sokoto goats were traded in the markets and animals were purchased for rearing trading ceremonies butchering catering sacrifice and festivals there were significant differences between species breeds purchased for various purposes a hedonic price model was fitted to determine factors influencing price after adjustments were made for age weight sex time of transaction and market wad sheep commanded higher prices than wad goats and red sokoto goats for all purposes except for butchering catering red sokoto goats commanded similar or lower prices than wad goats depending on the purpose for purchase and y ankasa sheep principally purchased for the eid el kabir festival commanded marginally higher prices than wad sheep the market share of wad sheep is currently small and is under competition from northern sheep and goats so increased production of wad sheep in the south will benefit both producers and consumers in the area in general the results indicate that buyers have preferences for specific breeds and species for specific purposes so producers and sellers may benefit by targeting specific buyer categories and times of the year

demand for farm output in a complete system of demand functions demand interrelationships for farm outputs that are theoretically consistent with consumer demand and marketing group behavior provide important linkages between retail and farm prices a conceptual model based on reduced form specifications for retail and farm prices is formulated and applied empirically to a set of eight disaggregated food commodities this approach circumvents the need for retail quantities which are frequently unavailable for disaggregated food commodities the results are consistent with theory and generally indicate significant substitution between farm and marketing inputs except for poultry derived demand elasticities are at least 40 larger compared to those derived assuming fixed proportions

does welfare inhibit success the long term effects of removing low income youth from the disability rolls i estimate the effects of removing low income youth with disabilities from supplemental security income ssi on their earnings and income in adulthood using a regression discontinuity design based on a 1996 policy change in age 18 medical reviews i find that youth who are removed from ssi at age 18 recover one third of the lost ssi cash income in earnings ssi youth who are removed and stay off ssi earn on average 4 400 annually and they lose 76 000 in present discounted observed income over the 16 years following removal relative to those who do not receive a review jel i30 i38 j14 supporters of welfare programs defend them as vital lifelines for those who face barriers to work while critics charge that these programs create perverse incentives to qualify and perpetuate dependency encapsulating this debate is the controversy over the us supplemental security income ssi program a program that provides cash payments and medicaid eligibility to low income children and adults with disabilities and the aged elderly after three decades of rapid expansion ssi is now the largest nonwork based cash welfare program in the united states paying about 50 billion each year to 8 million recipients including 1 3 million children 1 ssi has been singled out by policymakers and the media for potential perverse incentives

competition in the us meatpacking industry is it history the us meatpacking industry has become concentrated to a degree not experienced since the days of the beef trust a century ago a number of mainstream studies have investigated if such concentration has been detrimental to competition just as earlier studies may have helped shape competition policy towards meatpacking a century ago contemporary studies have made their way into current discussions and may shape competition policy at the turn of this century this paper asks whether or not contemporary studies are useful in informing competition policy after comparing how competition looks from the econometric vantage point with how it looks from the vantage point of the industry s 300 yr history this article concludes that mainstream studies are more useful for a competition policy targeting conduct rather than structure

theory of the firm in short run industry equilibrium a number of economists have studied the long run input behavior eugene silberberg 1974a lowell bassett and thomas borcherding 1 970a b c c e ferguson and thomas saving and paul meyer 1967 of a competitive industry in which entry or exit continues until industry output price moves to the minimum average cost of the marginal firm in the industry however this analysis requires very strong assumptions which severely restrict diversity between firms silberberg 1974a for example assumes all firms production functions are identical except for a scale factor complementary to these long run investigations i will present a compact but thorough analysis of the short run case in which technology and the number of firms are fixed but industry output price responds to aggregate supply changes of existing firms resulting from changes in factor prices in contrast to the long run analysis no assumptions limiting interfirm diversity nor any other restrictions beyond definition of the usual neoclassical firm are needed furthermore results are obtained for industry factor demand which do not necessarily hold for individual firms when they respond to factor prices jointly with other firms in the industry this contradicts the older methodology associated with paul samuelson 1947 in which factor demand responses are derived for firms acting in isolation from each other and their isolated responses are aggregated to obtain the industry factor response for example traditional theory shows input response obeys the law of demand for isolated firms but this standard result no longer holds when a firm adjusts within a larger industry of firms whose collective output response can affect output price thus the law of demand for industry factor behavior cannot be established by aggregation of isolated firm responses however its validity does nevertheless hold in the short run in which the number of firms in the industry is constant therefore the purpose of this paper is to characterize the short run industry level factor demand implications and to show how these implications relate to the traditional theory of isolated firm behavior in addition it is briefly shown how these short run results also imply that the law of demand is likely to hold even in the long run where entry and exit from the industry can occur even for an industry of quite dissimilar firms given the well established literature of the standard neoclassical firm the main body of the paper will confine presentation to required definitions and the statement plus interpretation of the main results all proofs and derivations are reserved for the appendix

public health insurance labor supply and employment lock we study the effect of public health insurance on labor supply by exploiting a large public health insurance disenrollment in 2005 approximately 170 000 tennessee residents abruptly lost medicaid coverage using both across and within state variation in exposure to the disenrollment we estimate large increases in labor supply primarily along the extensive margin the increased employment is concentrated among individuals working at least 20 hours a week and receiving private employer provided health insurance we explore the dynamic effects of the disenrollment and find an immediate increase in job search behavior and a steady rise in both employment and health insurance coverage following the disenrollment our results are consistent with a significant degree of employment lock workers who are employed primarily to secure private health insurance coverage jel codes i1 j22 h75