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

public regulation of agricultural biotechnology field tests economic implications of alternative approaches federal oversight of agricultural biotechnology field testing is based on public concerns that unknown consequences could arise from such tests and that firms may not adequately consider the public consequences of their research and development activities in this paper four general types of ex ante and ex post approaches to manage public risks from field testing are explored the analysis shows that the approaches are least effective at facilitating the research process yet controlling public risks when the research firm is small in size and potential damages exceed the value of the firm

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

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

philanthropic motives and contribution policy this paper discusses different forms of transfer from a group of rich individuals to a group of poor individuals this transfer is based on the philanthropic motive of the donor who is not indifferent to the use of his contribution in particular the poor individual s vector of consumption is entered as a part in the donor s utility function

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

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

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

pareto optimal redistribution comment occurs in the context of the hochmanrodgers scheme is a function of a people s rate of substitution between the satisfaction derived from retaining income and that derived from giving it and b the initial distribution of earnings which exists before giving occurs whatever the values of a the outcome will differ depending on b such at least will be the case unless everybody s rate of substitution is such that complete equality results pareto optimal redistribution thus constitutes a secondary redistribution which depends on the initial distribu

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

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

some stronger measures of risk aversion in the small and the large with applications the arrow pratt measures of risk aversion for von neumann morgenstern utility functions have become workhorses for analyzing problems in the microeconomics of uncertainty they have been used to characterize the qualitative properties of demand in insurance and asset markets to examine the properties of risk taking in taxation models and to study the interaction between risk and life cycle savings problems to name just a few applications equally importantly they have generated the linear risk tolerance class of utility functions which has provided canonical examples in such diverse areas as portfolio theory and the theory of teams despite these successes there have been a number of areas for which the results have been weaker than hoped it is natural to use the risk aversion measures to compare the behavior of individuals in risky choice situations for example consider the individual portfolio choice problem in a two asset world with a riskless asset and a risky asset if individual a has a uniformly higher arrow pratt coefficient of risk aversion than individual b then b will always choose a portfolio combination with more wealth invested in the risky asset but suppose that both assets are risky now there is no obvious sense in which the more risk averse individual can be said to hold a less risky portfolio but it seems strange that such a simple alteration should destroy the analytics which support the basic intuition similarly consider the basic insurance problem if one individual a is more risk averse than another b in the arrow pratt sense it follows that a will pay a larger premium to insure against a random loss than will b typically though an individual evaluates partial rather than total insurance that is only some gambles can be insured against and others must be retained in this case even when the gambles which are retained are independent from those which are insured it is no longer true that the individual whose arrow pratt measure of risk aversion is higher will pay a larger insurance premium the situation is no better when we consider comparative statics exercises for a single individual decreasing absolute risk aversion in the sense of arrow and

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

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

the relative efficiency of private and public transfers this paper develops a model for comparing the relative efficiency of private versus public financing of transfers a distinctive feature of the analysis is explicit recognition of important weaknesses and strengths of each form of financing a collective consumption good our results show that the preferred financing method is ultimately an empirical issue with the answer depending critically on donor motives and the government s ability to correctly ascertain donors tastes

the tullock bastiat hypothesis inequality transfer curve and the natural distribution of income conventional wisdom has long held that public policy has worked to reduce income inequality in contemporary america or that at least it has the real capability of achieving that goal thurow 1971 for example the evidence is strong that there was a pronounced decline in measured inequality during the 1930s and 1940s a period of greatly increased governmental intervention on both the tax and expenditure side designed to reduce inequality lindert and williamson 1980 increased government expenditures went or so it was argued largely to alleviate the plight of the poor and thus greater federal public aid expenditures brought about greater equality similarly it commonly has been maintained that higher and more progressive federal taxes serve to further reduce inequality in america there is another view however which holds that governmental intervention in markets may have a different impact while he believes the modern welfare state has clearly reduced incomes for the extremely wealthy tullock 1983 has suggested that many government transfers are not transfers from higher to lower income groups but rather transfers within the middle class allowing at least the possibility that governmental transfer activity might not in the aggregate increase income equality in any significant manner perhaps the citizenry are interested in promoting income equality but only to some limited extent in that regard evidence compiled by lebergott 1975 is interesting since the midnineteenth century there has been a remarkable rough constancy in government payment levels to the poor relative to wage levels of common laborers to be sure there have been some periods of increased support for the poor such as during the heyday of the war on poverty in the late 1960s but as tullock has expressed in private correspondence with us the body politic has spasms of feeling more than usually charitable and then goes back to normal the conventional wisdom had previously been questioned by reynolds and smolensky 1977 and for that matter by bastiat 1848 1964 who said that the state produces more poverty than it cures along similar lines lebergott 1975 15 speaking of poor elderly americans observed they are not impoverished in spite of the american capitalist welfare state they are in poverty because of it

stochastic choice in insurance and risk sharing a reply yoram kroll s comment arises from an ambiguity in my paper which i think leads him to misinterpret the purpose of the analysis fortunately the comment does generate an additional result that is of value unfortunately in pursuing the wrong side of this ambiguity kroll concludes that stochastic dominance rules are quite ineffective in ranking insurance strategies such as full coverage and excess policies this conclusion does not hold and my main result is still valid much of the economic analysis of insurance buying strategies has been undertaken on the assumption that the premium to be paid is proportional to the actuarial value of the policy in other words there is a constant percentage loading given these conditions full insurance is never optimal for a risk averter smith 9 mossin 7 why then do so many people routinely purchase full insurance to illuminate this issue consider the problem what premium reduction is necessary to induce a risk averter to select a policy containing an excess deductible over a policy offering full cover the answer given in my paper is that the premium reduction must exceed the mathematical value of the uninsured risk this being a necessary condition but not a sufficient condition this result is robust in the face of kroll s comment but what is at issue is whether the premium example outlined in my paper satisfies this condition using the same notation as kroll the condition for second degree stochastic dominance of the full cover over the excess deductible policy is

pareto optimal redistribution and private charity abstract when private charity exists and is motivated by utility interdependence a non pareto optimal outcome the free rider problem typically arises nevertheless incremental fiscal redistribution cannot achieve a paretian welfare improvement so long as private charity continues at positive levels donors respond to incremental fiscal redistribution by reducing their voluntary contributions by exactly a dollar for every dollar transferred in this way no net transfer is achieved unless incremental fiscal redistribution is pursued to the point where private contributions have been driven to zero alternatively a net transfer may be achieved by fiscal measures which affect donors marginal incentives to donate