animal breeding and productivity growth of dairy farms we introduce genetic based technical change into a malmquist productivity index and measure the growth in productivity caused by bovine breeding because breeding is likely to affect milk quality we adjust milk quantities for quality differences we use panel data on icelandic dairy farms from 1997 to 2006 to estimate an input distance function the malmquist productivity index shows that the average productivity growth rate is 1 6 scale effects are the most important source of this growth but 19 of the productivity growth rate is due to breeding if quality differences are ignored the average productivity growth rate is reduced by 83

nonlinearities in economic dynamics two reasons that led to the dominance of the linear stochastic difference equations approach the first one was the fact that the nonlinear systems seemed incapable of reproducing the statistical aspects of actual economic time series at best such models were able to produce periodic motion1 and an examination of the spectra of economic time series showed the absence of the spikes that characterise periodic data the emphasis on the equilibrium approach to aggregate economic behaviour cf lucas i 986 would make things even more difficult the plethora of stability results for models of infinitely lived agents with perfect foresight turnpike theorems suggested that even the regular fluctuations that had been derived in the literature on endogenous business cycles were incompatible with a theory that had solid microeconomic foundations further this indicated that while nonlinearities could be present the explanations of the fluctuations had to rest solely on the presence of exogenous shocks that working through the equilibrating mechanism would create the observed randomness if such shocks were absent the system would tend to a stationary state the second reason was the empirical success of the models based on linear stochastic difference equations low order autoregressive processes captured some of the features of aggregate time series in turn these processes can in principle result from an economy with complete markets where production is subject to exogenous shocks though the task of confronting these equilibrium models with actual data has not yielded uncontroversial results see the discussion and references in section i there was no obvious gain in the

testing for nonlinear dependence in daily foreign exchange rates the purpose of this article is to investigate whether daily changes in five major foreign exchange rates contain any nonlinearities although the data contain no linear correlation evidence indicates the presence of substantial nonlinearity in a multiplicative rather than additive form further examination reveals that a generalized autoregressive conditional heteroskedasticity model can explain a large part of the nonlinearities for all five exchange rates copyright 1989 by the university of chicago

the nonlinear time series properties of unemployment rates some further evidence the time series properties of unemployment rates for germany japan the uk and the us are re examined evidence of nonlinear structure in the residuals of the most parsimonious linear arma models is reported for all countries except japan modelling this nonlinearity using setar models suggests strong asymmetry in unemployment dynamics and the presence of a possible limit cycle for the uk however residual diagnostics for these models indicate remaining structure alternative tar models conditioned on past growth rates of industrial production yield substantial reductions in residual variance over both linear and setar counterparts iid residuals in all cases other than the us and threshold values at or very near zero clearly identifying the asymmetric behaviour of unemployment during expansionary and contractionary phases of the business cycle

further evidence on the asymmetric behavior of economic time series over the business cycle evidence has recently been presented by salih neftci to support the hypothesis that recessions in economic activity tend to be steeper and more short lived than recoveries in economic activity that evidence however was confined to the behavior of the unemployment rate in the united states in this paper it is shown that when neftci s methods are applied to analyze the behavior of real gross national product investment and productivity in the united states or when they are used to analyze industrial production abroad the asymmetry hypothesis seems to be less compelling

direct versus implicit superlative index number formulae economists and statisticians who construct estimates of total factor productivity or who estimate production functions or systems of consumer demand functions are often forced to aggregate subsets of their data in order to perform this aggregation an index number formula is generally used a price index p po pl x xi is defined to be a function p of the prices of the n commodities to be aggregated in periods 0 and 1 p pll pno and pl pl pn respectively and of the corresponding quantities utilized during periods 0 and 1 x xi xno andx1 xi xn1 respectively a quantity index q p0 pl x xl is defined to be another function q of the price and quantity vectors for the two periods generally we assume that p and q satisfy fisher s 1922 weak factor reversal test

stochastic production and heterogeneous risk preferences commercial fishers gear choices we present a model of fishers gear choice which allows for heterogeneity both in production technology and risk preferences and apply it on a panel of swedish trawlers stochastic revenue functions are estimated and used to predict the mean and standard deviation of revenue for each trip in a random parameters logit model we test if these predicted values explain gear choice a majority of fishers respond positively to increased mean and negatively to increased variability of expected landing values indicating risk aversion but also show a strong tendency to choose the same gear used on the previous trip

cost function estimation under risk aversion standard definitions of the cost function do not admit risk standard ex post approaches to cost function estimation yield biased and inconsistent estimates when production is stochastic recently an ex ante approach to cost function estimation with stochastic production has been developed by imbedding the distance function in the cost function estimation problem we generalize the approach to consider risk aversion in decision making only two empirical studies have considered stochastic production in cost function estimation both have required constant returns to scale we demonstrate a methodology sufficiently general to consider nonconstant returns to scale

threshold effects in the patent growth relationship a pstr approach for 60 developed and developing countries this study analyzes whether there is a threshold effect in the innovation growth relationship using data from the period 2008 2017 we perform an analysis using 60 countries in the whole sample an

enterprise diversification in us dairy impact of risk preferences on scale and scope economies enterprise diversification has recently become a prominent feature of us dairy farms scope economies and risk aversion are two forces that simultaneously determine diversification we jointly estimate scope economies and determine risk preferences under price uncertainty we reject risk neutrality in favour of increasing absolute risk aversion iara and increasing relative risk aversion irra scope economies are significant but diminish with farm size increasing returns to scale exist in the production of multiple enterprises and diminish with size large farms operate under decreasing returns to scale ignoring risk preferences a common practice in empirical work results in an underestimate of the effect of scope economies for large farms

threshold nonlinearities in unemployment rates further evidence for the uk and g3 economies the paper appraises the in sample and out of sample adequacy of linear ar and nonlinear setar models of unemployment rates for germany japan the uk and the us tests are reported for the presence and specification of threshold nonlinearities setar model estimates limiting dynamic properties and residual diagnostics and out of sample forecasting performance in sample threshold non linearities are confirmed to be strongly present for the uk us and germany and more marginally so for japan out of sample excepting japan setar models provide superior onestep ahead forecast on rmse grounds most notably for the us final tests indicate that these models exhibit predictive accuracy in the sense of parameter and residual variance stability implying the potential for exploitation of such nonlinearity in official forecasting

asymmetric employment cycles in britain evidence and an explanation search and matching models imply that firms employment adjustment costs depend on the tightness of the labor market giving rise to endogenous or nonlinear dynamics in employment this paper sets this argument out in detail estimating a model simultaneously explaining the long run level of employment and the nonlinear dynamics one of the implications of the estimated model is that asymmetric business cycles occur with the downswing in employment being sharper and deeper than the upswing copyright 1992 by royal economic society

parametric efficiency tests economies of scale and input demand in u s electric power generation duality theory has been applied increasingly in recent years to study the structure of production a major advantage of using duality theory is that systems of input demand equations can be derived by simple differentiation facilitating the use of flexible functional forms also use of duality theory makes it possible to choose a representation of the technology which has desirable properties for estimation such as exogeneity of the regressors however the use of a dual representation of production structure is appropriate only if the corresponding maintained hypothesis concerning economic behavior e g cost minimization or profit maximization is valid the perceived advantages of the dual approach to studying production structure have led to some applications in which the maintained hypothesis concerning economic behavior is unlikely to be appropriate for example neoclassical cost functions have been used to study the characteristics of production in regulated industries despite an extensive theoretical literature indicating that a profit maximizing regulated firm would not minimize costs subject to market prices 2 in this paper we propose a generalized cost function that retains the principal advantages of the neoclassical cost function but does not require that cost minimization subject to market prices be imposed as a maintained hypothesis in our model firms are assumed to base their production decisions on unobservable shadow prices which reflect the effects of regulation on the effective prices of inputs parametric tests for cost minimization are obtained by expressing shadow prices as functions of market prices the generalized cost function is estimated with data for regulated electric utilities the parametric restrictions corresponding to cost minimizing behavior subject to market prices are rejected implying that the use of a neoclassical cost function is not appropriate in this application 3

the economic costs of environmental regulation in u s dairy farming a directional distance function approach analyses of the costs of regulating greenhouse gas emissions from dairy production which could be used to assess the effectiveness of alternative policy measures is a missing link in the literature this article addresses this gap by establishing the economic impact associated with a hypothetical greenhouse gas environmental regulatory regime across major dairy producing counties in the united states in doing so the article makes three important contributions to the literature first it develops a comprehensive pollution index based on environmental protection agency methodologies which contrasts with previous studies that rely on partial measures based only on surplus nitrogen stemming from the over application of fertilizer second the article uses a directional output distance function an approach that has not been employed previously to evaluate polluting technologies in the u s dairy sector third the article incorporates a four way error approach that accounts for unobserved county heterogeneity time invariant persistent technical efficiency time varying transient technical efficiency and a random error the results indicate that regulating greenhouse gas emissions from dairy farming would induce a 5 percentage point increase in average technical efficiency in addition the economic costs of implementing this hypothetical regulatory framework exhibit significant spatial variation across counties in the united states

education experience and allocative efficiency a dual approach a generalization of the dual non frontier profit function approach to evaluating allocative efficiency is developed that allows for training human capital variables to influence the efficiency level directly an application to pennsylvania dairy indicates that education and experience are substitutes and play a significant role in the level of efficiency while these operators are not allocating their variable inputs in an absolutely efficient manner relative efficiency can be achieved for four of six possible input combinations for prescribed levels of education and experience furthermore the estimates of the efficiency measures suggest that these operators are maximizing production rather than short run profits

diseconomies of size with fixed managerial ability managerial ability has important implications for farm growth in this article we first show in a production model that increasing output with a fixed level of managerial ability can lead to a decrease in profits next we discuss the effect that managerial ability has on economies of size in the empirical part economies of size are estimated for a sample of dairy farms using a proxy for managerial ability which is calculated as a technical efficiency index the results show that increasing farm size while holding managerial ability constant can be an important source of diseconomies of size copyright 2003 oxford university press

a study of bank efficiency taking into account risk preferences abstract i use the stochastic cost frontier approach to investigate efficiency of banks operating in the third federal reserve district accounting for the quality and riskiness of bank output in addition to the mean and mode of the conditional distribution of the one sided error term i calculate confidence intervals for the inefficiency measures based on the conditional distribution the results indicate that third district banks are operating at cost efficient output levels and product mixes but are not efficiently using their inputs the second part of the article relates the inefficiency measures to several correlates

innovation and performance evidence at micro level this empirical study aims to shed light on the link between innovation and economic performance at micro level based on a comprehensive survey among dairy and crop farms in the netherlands we estimate a structural multi stage model to deliver evidence on the effect of engagement and investment in innovation on the production of product process and organizational or marketing innovations as well as on the effect of such innovations on farm level productivity the results suggest various market and farm behaviour related factors to stimulate an increase in innovation engagement and production furthermore the study reveals that indeed a greater innovation investment per unit innovation input leads to a higher probability of producing at least one successful product process and or organizational or marketing innovation innovation output the production of process and organizational or marketing related innovation leads to significant productivity gains various recommendations towards a more effective and efficient innovation policy are finally given

is the business cycle characterized by deterministic chaos abstract tests are conducted on u s macroeconomic data for the presence of low dimensional deterministic chaos where deterministic chaos is defined as in grandmont s 1985 walras bowley lecture or in brock 1986 the idea is to test for evidence of endogenous instability causing the business cycle low order autoregressions are hard to reject with our methods evidence of chaos is weak but our tests may be too weak to detect it evidence of nonlinearity is present in employment 1950 i to 1983 iv unemployment 1949 i to 1982 iv monthly post war industrial production and pig iron production 1877 1937

are business cycles asymmetric a correction neftci 1984 proposed a nonparametric test procedure for determining whether business cycles are asymmetric in the sense that contractions are steeper than expansions he found evidence of this type of asymmetry in postwar quarterly u s unemployment variables this comment identifies a probable error in neftci s empirical work that reverses the significance of his results for the unemployment rate and it suggests that this test may have low power and be sensitive to measurement error

on the nature and magnitude of cost economies in hog production in this article we assess the impact of farm size on production cost and evaluate the marginal costs and margins by considering that input prices may change with the scale of production by using french hog farm data we estimate a system of equations including a feed price function input demand functions and an output supply function based on a technology approximated by a combined generalized leontief quadratic form our results suggest that the marginal costs are over estimated when the adjustment of the feed unit prices to a change in farm size is not controlled for more specifically the cost economies for large farms enjoying the highest profits arise primarily from lower feed prices with technological scale economies having little impact in contrast farms with no hired labor exhibit technological scale economies and reach higher price cost margins compared to larger farms

what floats your boat preference revelation from lotteries over complex goods abstract we examine a type of lottery used to distribute some publicly held resource access rights the lottery provides participants with the opportunity to choose among a set of simple gambles over multi attribute goods participant choices result in an endogenous distribution of success rates over gambles that reflects tradeoffs between the relative desirability of the available goods and the probability of winning when lottery winnings are multi attribute goods lottery outcomes provide sufficient information to estimate hedonic prices marginal utility and marginal rates of substitution among attributes we develop a model for characterizing preferences from this information set we apply our model to idaho s four rivers whitewater recreation lottery which allows applicants to apply for one permit among a large set of alternative river day combinations that provide varying river and weather characteristics this lottery structure shows promise as a foundation for economic experiments for preference revelation

costly search and recruiting a labor market model with costly search and recruiting is constructed it incorporates many features found in other models and provides new insights into the effects of externalities and transaction costs the model possesses a continuum of equilibria some of which may be pareto ranked with different rates of unemployment despite the multiplicity of equilibria comparative statics results are obtained copyright 1987 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

income equivalence and a proposed resource rent charge abstract we demonstrate the equivalence of various income based charges when perfect certainty prevails as well as deviations from equivalence under uncertainty some of these equivalences are known but the derivations of others such as cases for two types of free equity are not these equivalences lay the foundation for a proposed accrued rent charge arc as an alternative to resource rent taxes rrt both as proposed and implemented we argue that the arc may be preferred to the rrt because the timing of returns to investors owners of reproducible capital and owners of natural assets coincide that is returns accrue to owners of natural assets earlier in time with the arc relative to the rrt in addition we argue that while both charges are inefficient when there is uncertainty the arc may be relatively more administratively and economically efficient finally we use simulations to compare the arc to the rrt and to standard income charges and discuss the results

a cost approach to economic analysis under state contingent production uncertainty this article explores the economics of input decision under production uncertainty the article develops a methodology to specify and estimate cost minimizing input decisions under a state contingent technology the analysis is applied to time series data on u s agriculture it finds strong empirical evidence that expected output alone does not provide an appropriate representation of production uncertainty the results provide empirical support for an output cubical technology this indicates that an ex post analysis of stochastic technology appears appropriate the analysis also provides evidence that the cost of facing production risk has declined in u s agriculture over the last few decades copyright 2008 oxford university press

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

characterizing nonlinearities in business cycles using smooth transition autoregressive models during the past few years investigators have found evidence indicating that various time series representing business cycles such as production and unemployment may be nonlinear in this paper it is assumed that if the time series is nonlinear then it can be adequately described by a smooth transition autoregressive star model the paper describes the application of these models to quarterly logarithmic production indices for 13 countries and europe tests reject linearity for most of these series and estimated star models indicate that the nonlinearity is needed mainly to describe the responses of production to large negative shocks such as oil price shocks

testing nonlinearities in economic growth in the oecd countries an evidence from setar and star models this study estimates the self exciting threshold autoregressive setar and smooth transition autoregressive star models and examines the nonlinear and regime switching dynamics of economic growth for a set of 10 oecd countries the null of linearity in setar model is tested using the recursive polynomial f test of tsay and the bootstrap based supremum average and exponential average lagrange multiplier lm tests of hansen the f test of tsay rejects the null of linearity for all the countries except spain and switzerland the setar model of hansen reinforces the evidence and suggests the rejection of linear model the star model rejects the null of linearity against star nonlinearity for all the countries except denmark and switzerland the sequential f tests for the conditional nulls suggest the lstar nonlinearity for australia belgium france sweden and uk and the estar nonlinearity for canada spain and the usa

scale economies and inefficiency of u s dairy farms this study employs data drawn from the 2000 agricultural resource management survey a u s department of agriculture sponsored farmers survey the article estimates returns to scale relationships across dairy farms of different sizes and across different regions incorporating variables hypothesized to influence farm performance results point to significant scale economies in u s dairy farms and underscore the importance of taking account of inefficiency when estimating scale economies contrary to previous research the preferred cost function specification does not show a region of decreasing returns to scale this finding helps explain why the average size of dairy farms has been increasing

patents vs publications and r d three sides of the same coin panel smooth transition regression pstr for oecd and brics countries abstractthe paper aims to define the optimal thresholds of publications and research and development r d expenditure and to investigate their impacts on patenting in oecd and brics countries to

off farm work and technical efficiency on u s dairies in this study we investigate the impact of an increase in farm households off farm work on technical efficiency te of u s dairies we present a theoretical framework that implies that an increase in farm household off farm work decreases te we use two nationally representative samples of u s dairies 2010 and 2005 agricultural resource management surveys and a parametric approach stochastic frontier analysis to empirically test the hypothesis results are generally consistent with the hypothesis and show that an increase in off farm work by the farm household is associated with a significant decrease in te in addition results show that there is a statistically significant difference in te between small medium and large farms small farms are associated with significantly higher off farm work and have lower te than large farms which implies that less off farm work by households with larger farms is at least partially responsible for the evidence of economies of scale in the u s dairy industry

risk aversion and price risk in duality models of production a linear mean variance approach a duality model of production is developed that permits risk aversion and price uncertainty the linear mean variance framework employed is tractable for empirical research in contrast to duality models of risk based on a generalized expected utility function the framework is more general than in standard price certainty models while retaining the simplicity needed for empirical research

risk aversion and yield uncertainty in duality models of production a mean variance approach a duality model of production is developed that endogenizes stochastic output decisions under risk aversion the model incorporates both yield and price uncertainty and nonlinear mean variance risk preferences this permits modeling of the firm s expected output supply and input demand decisions under risk and also in principle the firm s output variance decisions the duality model is tractable for empirical research

estimating economies of scope and scale under price risk and risk aversion this study uses duality to examine the effects of excluding output price risk and risk aversion on cost structures using data for kansas wheat and beef cow operations a dual risk model was used to determine multi product and product specific scale economies and economies of scope estimates for these measures were compared with those obtained from a deterministic model the results show that product specific scale economies are over estimated and economies of scope and multi product scale economies are under estimated for the deterministic model compared to the risk model

a fourier analysis of the us dairy industry measurement of economies of scale and scope is particularly important for predicting growth and product diversification however estimates are useful only to the extent the underlying production technology is modelled accurately this study measures economies of scale and scope in the rapidly changing us dairy industry with a fourier flexible cost function which provides a global approximation of the unknown function we use the high quality national agricultural and resource management survey arms survey data we find economies of scale at most firm sizes and persistent economies of scope across firm sizes in this industry which is counter to estimates from two diewert flexible functional forms

can the small dairy farm remain competitive in us agriculture smaller dairy farms in the us are observed to have higher costs than larger farms and whether those higher costs are due to technology or inefficiency has implications for policy to address the small farm if high cost of production on smaller farms is due to a higher cost frontier then to make small farms competitive would require research to devise and design technology that is suitable for small farms if instead high cost is due to inefficiency then educational approaches are needed to ensure small dairy farms use technology efficiently to determine the cause of higher costs on small farms the cost of milk production by farm size was decomposed into frontier and efficiency components with a stochastic cost curve using data on usa dairy farms although the frontier cost of production decreases with farm size that cost reduction is not as pronounced as a cost curve that includes inefficiency the higher cost of production on many smaller farms is caused by inefficiency rather than technology

rational expectations business cycles in search equilibrium we examine the rational expectations equilibrium paths of the model of search and barter in diamond s aggregate demand management in search equilibrium for some initial positions there are two equilibrium paths converging to different steady states with the high activity path pareto dominating the low activity path with some parameters there is also a continuum of equilibrium paths converging to another steady state moreover there can be cycles that are equilibrium paths even though the environment is stationary

the role of royalties in resource extraction contracts the manner in which governments charge mineral resource producers has been the subject of considerable debate income based charges such as resource rent taxes have been advocated on the theory that royalties and other output based charges create inefficiency by distorting production decisions using a principal agent approach to resource contracts separating asset ownership from asset use we demonstrate that royalties can be efficient under conditions of certainty and also when there is uncertainty and asymmetric information royalties serve a key pricing purpose signaling the marginal impact of extraction on the residual value of reserves and surrounding land or sea

is the us business cycle asymmetric some further evidence evidence of nonlinearity in growth rates of monthly industrial production unit labour costs consumer prices and unemployment is reported and alternative representations of that nonlinearity exami

differential uncertainties and risk attitudes between conventional and organic producers the case of spanish arable crop farmers the growing importance of economic factors in farmers decision to go organic has raised interest in characterizing the economic behavior of organic versus conventional farms published analyses so far have not considered differential uncertainties and farmers risk preferences between conventional and organic practices when comparing these techniques our article attempts to assess this issue we use a model of farmer decision under risk to analyze the differential values between spanish cop organic and conventional farms and to assess the incentives for adoption of organic practices results show that organic and conventional farms do have different abilities to control production risk as well as different risk preferences organic price premiums and subsidies are found to be powerful instruments to motivate adoption of organic techniques

fdi performance a stochastic frontier analysis of location and variance determinants the opening up process of the eastern european countries was marked by greater integration of fdi with their western neighbouring countries using the single step ml approach to stochastic frontier analysis the location and variance determinants of fdi are estimated using the knowledge capital kk model framework the findings based on a panel of bilateral fdi stocks from 10 western to 10 eastern european countries over the 1996 2007 period suggest fdi is determined by both horizontal and vertical motives while the process of liberalization and infrastructural developments significantly reduces the variance of fdi in using a stochastic frontier specification of the kk model the efficiency of fdi performance is identified relative to maximum levels the bilateral efficiency scores suggest a mixed performance indicating scope to improve the efficiency of fdi

mobility costs frictional unemployment and efficiency with imperfect job information flows it is plausible that the distribution of job offerings becomes more attractive when there are more vacancies and more unemployed with word of mouth communication this condition is derived given this condition steady state equilibrium is not efficient with welfare increased by the introduction of unemployment compensation even though all agents are risk neutral in this way workers become more selective in the jobs they accept

resource taxation with heterogeneous quality and endogenous reserves abstract this paper analyzes the impact of mining taxation on the intertemporal extraction profile for a heterogeneous ore body the extraction profile specifies both quantities and qualities extracted in each period total extraction is thus endogenously determined the taxes explicitly considered are severance taxes ad valorem or per unit on metal or on ore property taxes and profits taxes with depletion allowance the intertemporal framework integrates economic and geological factors generating new results on extraction distortions and providing qualification or reconciliation of previous diverse results in this area

business cycle asymmetry a deeper look this paper distinguishes two types of asymmetry in business cycles deepness and steepness deepness is defined as the characteristic that troughs are further below trend than peaks are above most previous research has focused exclusively on steepness which refers to cycles in which contractions are steeper than expansions a test for deepness is proposed and applied to u s post war quarterly unemployment real gnp and industrial production evidence of deepness is found for unemployment and industrial production while the evidence for real gnp is weaker previous evidence of steepness in unemployment is confirmed

an examination of the effect of ownership on the relative efficiency of public and private water utilities the behavior of privately and publicly owned water utilities is examined by estimating a generalized variable cost function containing the regular characteristics of the neoclassical cost function without requiring that cost minimization subject to market prices be imposed as a maintained hypothesis assuming that unobserved shadow prices reflect the regulatory environment of the water industry tests for cost minimization are obtained by deriving shadow prices as functions of market prices the empirical results provide evidence that public water utilities are more efficient than private utilities on average but are more widely dispersed between best and worst practice

a monte carlo study of the forecasting performance of empirical setar models in this paper we investigate the multi period forecast performance of a number of empirical selfexciting threshold autoregressive setar models that have been proposed in the literature for modelling exchange rates and gnp amongst other variables we take each of the empirical setar models in turn as the dgp to ensure that the non linearity characterises the future and compare the forecast performance of setar and linear autoregressive models on a number of quantitative and qualitative criteria our results indicate that non linear models have an edge in certain states of nature but not in others and that this can be highlighted by evaluating forecasts conditional upon the regime

on the determinants of corporate hedging finance theory indicates that hedging increases firm value by reducing expected taxes expected costs of financial distress or other agency costs this paper provides evidence on these hypotheses using survey data on firm s use of forwards futures swaps and options combined with computstat data on firm characteristics of 169 firms in the sample 104 firms use hedging instruments in 1986 the data suggest that firms which hedge face more convex tax functions have less coverage of fixed claims are larger have more growth options in their investment opportunity set and employ fewer hedging substitutes

short run returns to scale farm size and economic efficiency this paper analyzes the effects of returns to scale farm size technical allocative and scale inefficiencies on the profitability of utah dairy farms it derives the conditions necessary to compare the profitability of farms within and between different size classifications as small medium and large some comparative static results regarding increases in input prices and a decrease or withdrawal of price support on profitability of small medium and large farms are presented copyright 1993 by mit press