evaluating greening farm policies a structural model for assessing agri environmental subsidies this study uses a structural econometric model to evaluate the impacts of support from a european union agri environmental program designed to reduce nutrient pollution from agricultural land drawing on a representative sample of individual grain farms we first quantify the effects of agri environmental payments on farms decisions on land allocation and on fertilizer use we then combine the predicted land allocation and fertilizer use with environmental production functions to quantify the impact on nutrient loading finally we assess the monetary value of reduced nutrient pollution drawing on a recent valuation study

risk analysis of tillage alternatives with government programs stochastic dominance analysis of two tillage systems conventional tillage and no tillage for five crop rotations wheat fallow grain sorghum fallow continuous wheat continuous grain sorghum and wheat grain sorghum fallow shows that riskaverse managers prefer a conventional tillage wheat sorghum fallow system small changes in production costs or yields lead to indifference between this system and the no tillage wheat sorghum fallow and no till and conventional wheat fallow systems participation in the basic government commodity program generally increases average net returns and lowers variation of returns government commodity program payments calculated under a variety of scenarios do not generally encourage the use of no till practices for grain sorghum and wheat in the central great plains

government programs and adoption of conservation tillage practices on nonirrigated wheat farms a whole farm simulation analysis is used to investigate producer preferences for adoption of separate tillage practices minimum till combination till or no till under provisions of both the 1981 and 1985 farm bills an analysis of preference for participation or nonparticipation in government programs under both farm bills is also considered for risk averse producers a combination tillage practice with program participation is found to dominate as measured by stochastic dominance the other strategies considered under both the 1981 and 1985 provisions

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

entrepreneurial human capital and the long run survival of firms in india abstract this paper analyses the characteristics of entrepreneurs that contribute to firms survival in less developed countries ldcs the study which relies on data collected in a 1971 survey of entrepreneurs in south india and a follow up survey of surviving firms in 1993 finds that entrepreneurial human capital greatly influences firm survival the results indicate that firms founded by older entrepreneurs in higher castes are most likely to survive but that increased education of the founding entrepreneur reduces survival these results provide evidence that opportunities of entrepreneurs outside the firm ignored in most theories are important in firm survival

the effects of development constraints on forest management at the urban forest interface this article develops a model of a forest owner operating in a small open city environment where the rent for developed land is increasing concave in nearby preserved open space and is rising over time reflecting an upward trend in households income within this framework we examine how changes in nearby preserved open space and alternative development constraints affect an individual private landowner s decisions regarding both regeneration harvests and conversion dates we also examine how such policies affect development density once conversion from forestry to residential use occurs we show that when residential rents change over time the nature of the timber problem at the urban forest interface changes because it forces us to allow for the possibility of changes in land use from timber to residential use as a result the traditional faustmann setup is not suitable to study forest management decisions at this interface we also find that in the presence of rising income increases in permanently preserved open space hasten regeneration and conversion cuts of a neighboring parcel currently under forest use and leads to lower density development once conversion takes place compared to the case where income is constant we also find that both a binding development moratorium and a binding minimum lot size policy can postpone regeneration and conversion cut dates and thus help to protect open space even if only temporarily however the policies do not have the same effects on development density of converted forestland while the former leads to high density development the latter encourages low density development

empathy conditioned conservation walking in the shoes of others as a conservation farmer conservation tillage on farms can improve downstream water quality using a dual interests theoretical framework guided by the metaeconomics approach this paper examines the role of self interest and shared other interest in the conservation tillage adoption decision the data is from a 2007 survey of farmers in the blue river tuttle creek watershed of nebraska and kansas logit models show that farmers who temper their pursuit of self interest with shared other interest reflecting empathy sympathy are more likely to adopt conservation tillage habit and control also play a role farmers pursue a joint and interdependent own interest and not only self interest as presumed in microeconomics

rational demand and expenditures patterns under habit formation abstract this paper proposes a model in which habit formation is present in a relatively general but tractable way the consumer s problem is transformed into a sequence of two period fisherian problems by introducing a reduced utility function to ensure full dynamic rationality of the consumer by making preferences dependent on past real expenditure levels rather than past consumption bundles it is possible to characterize the long run behavior of the consumer stability analysis is performed the cases of immediate habit formation and delayed habit formation are discussed

true indexes and rational habit formation abstract in this paper we discuss the construction of true indexes when tastes change endogenously true indexes take the substitution possibilities of the consumer to a changing economic situation into account when equating the utility level of a particular period to the utility level attained in the base period through an appropriate change in income or the wage level when tastes change endogenously the current decision depends on the past history of consumption but by the same token the future path of consumption will depend on the current choice in a true index these intertemporal links of the current decision have to be taken into account for a particular specification of the habit formation process this is achieved by an appropriate transformation of prices and expenditures a true intertemporal wage index is computed for the period 1946 1967 in the u s because of increasing needs and intertemporal rationality this index is roughly constant and equal to 1 real wages remained constant

commodity price forecasting with large scale econometric models and the futures market this paper compares the accuracy of major commercial price forecasts for corn wheat soybeans soybean oil soybean meal cotton live cattle and hogs the price forecasting information in futures prices is evaluated by comparison the results among commercial forecasters are mixed but futures prices perform relatively better on average although not universally so these results have important implications for operational risk management

habit formation interdependent preferences and demographic effects in the almost ideal demand system the authors model myopic habit formation interdependence of preferences among consumers and demographic effects as taste shifters in a micro consumer demand model of the almost ideal demand variety the model is estimated for dutch micro data the authors investigate the dynamic properties of the model and find that it behaves very differently from models without interdependence of preferences the implications for micro macro modeling are discussed copyright 1991 by royal economic society

the constant preferences assumption as a specification error in demand analysis abstract complete demand systems often are estimated under the assumption that preferences are constant if preferences do change in reality this leads to a specification error this note explores some of the implications of such a specification error

acreage decisions under risk the case of corn and soybeans an acreage supply response model is developed under expected utility maximization the resulting framework is used to specify and estimate a system of risk responsive acreage equations for corn and soybeans in the united states particular attention is given to the truncation effects of government price supports on the distribution of corn and soybean prices also a wealth variable is included in the acreage equations the empirical results indicate that risk and wealth variables play an important role in cornsoybean acreage decisions the analysis also shows that cross commodity risk reduction is important in acreage allocation decisions

religious participation and children s education a social capital approach abstract based on the argument in both economic and sociological literature that religion is conducive to children s human capital formation this paper provides a model of religious participation and explores a mechanism that social capital affects children s education a la coleman coleman j s 1988 social capital in the creation of human capital american journal of sociology 94 s95 s120 the model generates several interesting implications which help explain some important stylized facts about education and religion further in a dynamic setting the model shows that there exists a steady state in which individuals allocate a positive amount of time and resources to religious activities thus it complements the existing literature to explain why seemingly unproductive religions can be everlasting

habit formation in consumer preferences evidence from panel data this paper tests for the presence of habit formation using household data a simple model of habit formation implies a condition relating the strength of habits to the evolution of consumption over time when the condition is estimated with food consumption data from the panel study on income dynamics the results yield no evidence of habit formation at the annual frequency this finding is robust to a number of changes in the specification it also holds for several proxies for nondurables and services consumption created by combining psid variables with weights estimated from consumer expenditure survey data

market rate versus fixed rate demand deposits abstract in an economy with uninsured banks market rate deposits are shown to provide services identical to fixed rate deposits without risking banking panics as long as there is not both aggregate uncertainty about liquidity demands and asymmetric information about bank asset quality however if both factors are present then the preferred deposit form depends on the riskiness of bank assets and information revealed through market prices the analysis may explain the evolution of fixed rate deposits before the introduction of deposit insurance moreover it provides currently relevant insights regarding deposit contract forms and deposit insurance

hypothetical intertemporal consumption choices the paper extends and replicates part of the analysis by barsky juster kimball and shapiro 1997 which exploits hypothetical choices among different consumption streams to infer intertemporal substitution elasticities and rates of time preference we use a new and much larger dataset than barsky et al furthermore we estimate structural models of intertemporal choice while parameterizing the parameters of interest as a function of relevant individual characteristics we also consider lobehaviorallc extensions like habit formation models with habit formation appear to be superior to models with intertemporally additive preferences

a test of the habit formation hypothesis using household data numerous studies have confirmed the importance of habit formation as represented by a lagged dependent variable in demand analysis although all work to date has been based on aggregate time series data this study uses household level bls interview panel data to test the habit hypothesis an interrelated demand system for seventeen goods is estimated from cross section data and compared with a similar system based on time series data the results show that the habit component is significantly different between the two data sets and much smaller in the cross section data habit effects while not as large in cross section data as time series are still highly significant several explanations are offered concerning why the two sets of estimates differ copyright 1991 by mit press

a stochastic dominance comparison of reduced tillage systems in corn and soybean production under risk returns per acre of reduced tillage systems including conventional chisel till plant and no till are examined under general assumptions concerning risk these returns are calculated using com and soybean experimental plot yields stochastic dominance rankings indicate an advantage second degree of conventional and chisel over no till when soil loss costs are not assigned annual per acre soil loss costs of 5 15 shift rankings towards the reduced tillage systems a 10 per acre cost results from corn yield losses of 0 06 per year 170 bushel per acre yield base over fifty years with a 5 real discount rate

entrepreneurship social mobility and income redistribution in south india development economists have been preoccupied with the problem of increasing the size of the gnp pie to the relative neglect of its distribution despite the recent disenchantment with the viewpoint that all classes share in the benefits of industrial growth empirical data on the distribution of income business opportunity and economic power are in short supply many of the studies on entrepreneurship and economic development when they are not apologetics for ruthless capitalist exploitation as paul baran suggests extol the achievements of the capitalist entrepreneur without examining class origins and monopoly advantage joseph schumpeter sees entrepreneurs irrespective of class origin as heroic figures with the dream and will to found a private kingdom to conquer adversity to achieve success for its own sake and to experience the joy of creation for gustav papanek 1967 the private entrepreneur who is frugal diligent far sighted remarkably able and willing to take political risks is in large part responsible for the success of pakistan in achieving rapid industrialization

estimating the environmental impact of land and production decisions with multivariate selection rules and panel data we propose an estimation procedure dealing with multivariate selection and dynamics in land choice and unobserved heterogeneity in structural and crop selection equations the method is applied to a multi output profit function with multiple corner solutions and farm level panel data estimation results reveal that the single selection rule associated with the tobit procedure is rejected in favor of our multivariate selection treatment inconsistent estimates are expected with the tobit procedure or if farmer fixed effects are omitted which can have important consequences for policy recommendations as illustrated in an evaluation of nitrogen runoff elasticities with respect to economic variables copyright 2011 oxford university press

structural agricultural land use modeling for spatial agro environmental policy analysis this paper develops a spatially disaggregated structural econometric model of agricultural land use and production based on the joint multi output technology representation introduced by chambers and just 1989 starting from a flexible specification of the farm profit function we derive land use allocation input application crop yield and livestock intensity equations in a joint and theoretically consistent framework to account for the presence of censored observations in micro level data the model is estimated as a system of two limit tobit equations via quasi maximum likelihood we present an empirical application using fine scale spatial data covering the entirety of england and wales and including the main economic policy and environmental drivers of land use change in the past forty years a simulation of the effects of diffuse pollution reduction measures illustrates how our approach can be applied for agro environmental policy appraisal

the price and welfare effects of biofuel mandates and subsidies the coordination of agricultural environmental and energy policies requires a thorough understanding of the interactions between crop food and energy markets this paper develops a general equilibrium model to analyze the interactions and to evaluate the price and welfare effect of biofuel mandates and subsidies results suggest that biofuel mandates are a primary cause of some of the major concerns associated with crop based biofuel production including higher food prices and lower consumer welfare the price and welfare effects of biofuel subsidies depend on the level of the biofuel mandate when the mandate is weak or not binding a biofuel subsidy becomes a transfer from consumers to biofuel producers which tends to reduce food and fuel prices because of the negative income effect however with a strong mandate a biofuel subsidy will increase the prices of crops food and fuel when crops account for a large share of production cost and when the supply of crops is inelastic using parameter values consistent with empirical evidence found in the u s we calculated the price and welfare effects of the biofuel mandates and subsidies specified in the energy independence and security act of 2007 results suggest that the biofuel mandates and subsidies increased the price of corn by 25 40 increased the price of food by 1 5 2 5 and lowered the price of gasoline by 5 10 overall the biofuel policies had only a small effect on consumer utility

habits and heterogeneity in demands a panel data analysis we examine demand behaviour for intertemporal dependencies using spanishpanel data we present evidence that there is both state dependence and correlatedheterogeneity in demand behaviour our specific findings are that food outside thehome alcohol and tobacco are habit forming whereas clothing and small durablesexhibit durability we conclude that demand analyses using cross section data thatignore these effects may be seriously biased on the other hand the degree ofintertemporal dependence is not sufficiently strong to make composite consumption significantly habit forming as has been suggested in some recent analyses

terrorism the relevance of the rational choice model terrorism in general and suicidal terrorism in particular is popularly seen as irrational but many economists and political scientists argue otherwise this paper distinguishes three different senses of irrationality unresponsiveness to incentives deviation from narrow self interest and failure of rational expectations it concludes that an intermediate position on the rationality of terrorism is appropriate the typical terrorist sympathizer deviates only slightly from homo economicus but active terrorists arguably stray from narrow self interest and rational expectations and suicidal terrorists probably violate both deterrence remains a viable anti terrorism strategy but deviations from rational expectations increase the potential of persuasion and appeasement

intertemporal substitution and λ constant comparative statics abstract this paper characterizes intertemporal substitution along intertemporal consumption profiles a precise definition of the intertemporal elasticity of substitution is presented and compared to intertemporal analogs of the hicks allen and direct elasticities of substitution and the marginal utility of wealth or constant own price elasticity of demand in a model with perfect foresight i establish that constant comparative statics accurately characterizes intertemporal substitution if and only if lifetime utility is intertemporally additive i also demonstrate the usefulness of constant comparative statics in characterizing intertemporal substitution in models without time separability or perfect foresight

consequences of the clean water act and the demand for water quality since the 1972 u s clean water act government and industry have invested over 1 trillion to abate water pollution or 100 per person year over half of u s stream and river miles however still violate pollution standards we use the most comprehensive set of files ever compiled on water pollution and its determinants including 50 million pollution readings from 240 000 monitoring sites and a network model of all u s rivers to study water pollution s trends causes and welfare consequences we have three main findings first water pollution concentrations have fallen substantially between 1972 and 2001 for example the share of waters safe for fishing grew by 12 percentage points second the clean water act s grants to municipal wastewater treatment plants which account for 650 billion in expenditure caused some of these declines through these grants it cost around 1 5 million 2014 dollars to make one river mile fishable for a year we find little displacement of municipal expenditure due to a federal grant third the grants estimated effects on housing values are smaller than the grants costs we carefully discuss welfare implications

i ll never forget my first cigarette a revealed preference analysis of the habits as durables model we provide a revealed preference analysis of the habits as durables model this approach avoids the need to impose a functional form on the underlying utility function we show that our characterization is testable by means of linear programming methods and we demonstrate its practical usefulness by means of an application to cigarette consumption using a spanish household consumption data set we find that the habits as durables model has better empirical fit in terms of predictive success compared to the short memory habits and life cycle models

time varying intercepts and equilibrium analysis an extension of the dynamic almost ideal demand model demographic effects and user costs in demand systems have usually been modelled explicitly a more robust approach is a state space formulation of the demand system where time varying intercepts account for the effects of unobservable variables the author embeds such a system in a vector autoregressive distributed lag model with a bayesian hierarchical prior the model is estimated by a markov chain monte carlo method on samples involving quarterly us and uk data in the us case the results are compared with a previously published cointegration analysis of the same data copyright 2002 john wiley sons ltd

impacts of federal crop insurance on land use and environmental quality this article integrates economic and biophysical models to assess how federal crop revenue insurance programs affect land use cropping systems and environmental quality in the u s corn belt region the empirical framework includes econometric models that predict land conversion and crop choices at the parcel level based on expectation and variance of crop revenues land quality climate conditions and physical characteristics at each site the predictions are then combined with site specific environmental production functions to determine the effect of revenue insurance on nitrate runoff and leaching soil water and wind erosion and carbon sequestration results suggest that federal crop insurance has on average a small effect on conversions of non cropland to cropland and somewhat more significant impacts on crop choice and crop rotation these changes in cropping systems have on average small impacts on agricultural pollution

habit formation and demand for sugar sweetened beverages using scanner data we estimated demand for nine nonalcoholic beverages under habit formation we found strong evidence for habit formation although demand for sugar sweetened beverages by low income households is less elastic to own price changes compared with high income households there is evidence that high income households consider beverages to be more substitutable than low income households do a half cent per ounce tax on store purchased sugar sweetened beverages will result in a moderate reduction in consumption of sugar sweetened beverages for both income strata because of habit formation long run national tax revenue from a sugar sweetened beverage tax is about 15 to 20 lower than short run revenue

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

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

hierarchical choice in economics abstract the paper examines the relevance for economic issues of choice which is not characterized by unlimited substitutability after showing that hierarchical choice is common in other social sciences like psychology the paper proceeds with an examination of such choice and of its different categories subsequently the implications for hierarchical choice for specific economic issues are analysed in particular there is discussion and literature review of demand theory engel curves the theory of the firm and social choice theory finally some suggestions for the application to other economic problems are considered

a simple nonadditive preference structure for models of household behavior over time intertemporal separability is an almost universal assumption in empirical work on household behavior but a good deal of recent work on consumption and labor supply suggests that it may not be tenable the traditional weakening of this assumption is to allow for habit formation i propose an alternative structure for intertemporal preferences that nests intertemporal additivity in a simple way and yields closed form solutions for demand functions this structure includes the neoclassical durables model as a special case i derive a demand system that nests the almost ideal system as its time separable counterpart this model is estimated on u k aggregate time series data for seven goods time separability is decisively rejected moreover i find that ignoring temporal dependencies leads to considerable bias in the estimates of elasticities of the seven goods durables display the strongest nonseparable effect the estimated reactions are consistent with the neoclassical durables model

intertemporal nonseparability or borrowing restrictions a disaggregate analysis using a u s consumption panel we propose a method to test for liquidity constraints which relies on using the within period marginal rate of substitution condition as a benchmark to evaluate the intertemporal euler equation if spot markets for nondurable goods exist but financial markets either do not exist or are imperfect we show how the comparison of first order conditions involving the relevant spot and intertemporal prices can be used to detect the imperfection we apply our methodology to a large sample of u s households drawn from twelve years of the consumer expenditure survey allowing for a general nonseparable preference structure our estimates of first order conditions do not indicate the presence of liquidity constraints with the possible exception of young households

the effects of banning advertising in junk food markets we develop a structural model to analyze the eects of banning advertising on market equilibria and welfare in junk food markets we consider the impact on demand and prices and show how to quantify welfare eects when advertising might lead consumers to take decisions that are inconsistent with their underlying preferences we use transaction level data on the potato chips market and nd that banning advertising leads to a direct reduction in demand but also toughens price competition leading to lower prices and increased demand welfare increases as consumers benet from no longer making distorted

household demand for energy in the uk abstract many demand systems have recently been estimated which treat consumer expenditure on energy as one of a small number of similar expenditure groups this study formulates a simple demand system in which expenditures on individual fuels are also examined and into which the role of the stock of energy using appliances is integrated it goes on to adopt a particular functional form for consumer preferences and then fits the resultant econometric system to quarterly british data

native american obesity an economic model of the thrifty gene theory native american obesity is hypothesized to result from three potential causes 1 a genetic predisposition or the thrifty gene 2 a rational addiction to nutrients and 3 dietary adjustment costs these hypotheses are tested using a two stage household production approach and scanner data from a panel of native and non native supermarkets nutrient intake for both groups is strongly influenced by adjustment costs native americans tend to place higher implicit valuations on protein relative to fats and carbohydrates compared to non natives consequently reductions in real carbohydrate prices over time may be a cause of high incidence of native american obesity

genetic variation in financial decision making individuals differ in how they construct their investment portfolios yet empirical models of portfolio risk typically account only for a small portion of the cross sectional variance this paper asks whether genetic variation can explain some of these individual differences following a major pension reform swedish adults had to form a portfolio from a large menu of funds we match data on these investment decisions with the swedish twin registry and find that approximately 25 of individual variation in portfolio risk is due to genetic variation we also find that these results extend to several other aspects of financial decision making

banks versus markets a response to kucinskas abstract this is a response to kucinskas 2016 who comments on my article zimper 2013

the robot the party animal and the philosopher an evolutionary perspective on deliberation and preference this paper examines the evolutionary fitness of a variety of ways of reaching decisions in early hunter gatherer societies in order to derive insights about how economists should view modern consumers it challenges conclusions reached by mainstream economists robson rayo and becker about why hunter gatherers needed sensory rewards and about the kinds of preference systems that would have conferred evolutionary fitness it argues that evolution favours those with a variety of ways of reaching decisions programmed deliberative intuitive and go with the flow and that the prospect of sensory rewards serves an evolutionary role by diverting people from thinking too much about what they are doing in situations in which deliberation might interfere with survival or reproduction the evolutionary role of a reluctance or failure to make trade offs is also considered along with the benefits of developing a relatively fixed identity rather than being all things to all men

joint estimation of technology adoption and land allocation with implications for the design of conservation policy one challenge to estimating the parameters of a technology adoption model is that technology is selected jointly with land allocation the article estimates a nested logit model of technology and crop choices that accounts for unobserved correlation among decisions estimation is conducted with a data set of adoptions in contrast to the more common approach of using cross section observations of existing technologies estimation results support the choice of a nesting structure as opposed to a more standard multinomial logit model adoption of precision irrigation technology is shown to be more sensitive to financial incentives affecting input price and technology cost than suggested by previous studies

from microlevel decisions to landscape changes an assessment of agricultural conservation policies the growth in conservation programs has created a need for modeling frameworks capable of measuring microlevel behavioral responses and macrolevel landscape changes this paper presents an empirical model that predicts farmers production practices and the resulting levels of agricultural runoffs at more than 42 000 agricultural sites in the upper mississippi river basin under alternative conservation policies results suggest that payments for conservation tillage and crop rotations increase the use of these conservation practices however the acreage response is inelastic and the programs are not likely to be cost effective on their own for addressing hypoxia problem in the gulf of mexico

rational habits in gasoline demand abstract the dynamics of demand for energy goods such as gasoline are complicated by investment decisions and behavioral habits both types of complication can be captured by a habits model in which past consumption enters into an agent s current utility function if the agent is forward looking or rational then habits imply his consumption of the habit forming good will be sensitive to his expectation of future market conditions in particular future prices this sensitivity implies in turn that traditional measures of price elasticity will underproject consumers responsiveness to policy interventions this paper examines the implications of rational habits on gasoline demand using a simple model encompassing myopic and rational habits i demonstrate that an agent with rational habits will respond to anticipated future price changes and react more strongly to permanent than to temporary price changes with this distinction increasing in the strength of the habit i then estimate several habits models using panel data on u s states for the years 1989 through 2008 my preferred specification yields evidence of rational habits and moreover i find consumers to be twice as responsive to tax driven price changes as to market driven price changes taxes and other policies that operate through the gasoline price are a more powerful policy instrument than traditional price elasticity would lead us to believe

economic potential of biomass based fuels for greenhouse gas emission mitigation use of biofuels diminishes fossil fuelcombustion thereby also reducing net greenhousegas emissions however subsidies are neededto make agricultural biofuel productioneconomically feasible to explore the economicpotential of biofuels in a greenhouse gasmitigation market we incorporate data onproduction and biofuel processing for thedesignated energy crops switchgrass hybridpoplar and willow in an u s agriculturalsector model along with data on traditionalcrop livestock production and processing andafforestation of cropland net emissioncoefficients on all included agriculturalpractices are estimated through crop growthsimulation models or taken from the literature potential emission mitigation policies ormarkets are simulated via hypothetical carbonprices at each carbon price level theagricultural sector model computes the newmarket equilibrium revealing agriculturalcommodity prices regionally specificproduction input use and welfare levels environmental impacts and adoption ofalternative management practices such asbiofuel production results indicate no rolefor biofuels below carbon prices of 40 perton of carbon equivalent at these incentivelevels emission reductions via reduced soiltillage and afforestation are more costefficient for carbon prices above 70 biofuels dominate all other agriculturalmitigation strategies

towards a more general approach to testing the time additivity hypothesis a new procedure is proposed for re examining the assumption of additivity of preferences over time which although untenable is usually maintained in intertemporal analyses of consumption and labour supply the method is an extension of a famous work by browning however it is more general in permitting the estimation of intertemporal demand systems which are explicit in an unobservable variable price of utility but may lack a closed form representation in terms of observable variables such as prices and total outlay it also makes extensive use of duality theory to solve the endogeneity problem encountered in browning s study applying this method with an appropriate estimator to the australian aggregate data it is found that the time additivity hypothesis is decisively rejected which is consistent with browning s conclusion

a dynamic analysis of market structure based on panel data internal market structure analysis infers brand positions in an attribute space from preference and choice data given a market in which consumers have heterogeneous tastes for attributes previous market structure models have adopted a static framework e g elrod 1988 chintagunta 1994 elrod and keane 1995 furthermore they assumed that consumer perceptions of brand attributes do not vary across consumers yet these approaches may render inaccurate representations of market structure if there is state dependence in consumer choice behavior this paper attempts to incorporate consumer choice dynamics into market structure models by specifying the source of choice dynamics explicitly in particular the process by which past purchases affect current choices is modeled in a framework which captures both consumer habit persistence and variety seeking behavior more specifically consumer preferences for brand attributes are modeled to depend on the attributes of brands bought on the previous purchase occasion furthermore the modeling approach adopted incorporates heterogeneity in both consumer preferences and perceptions of brand attributes the audience of this paper includes practitioners and academics interested in understanding consumer choice processes and inferring market structure from consumer choice data the proposed models are estimated on nielsen scanner panel data for margarine peanut butter yogurt and liquid detergent using simulated maximum likelihood techniques the empirical results suggest that accounting for choice dynamics improves both in sample and out of sample fit the results indicate that the average consumer is habit persistent in all the product categories studied this result is consistent with the findings of kannan and sanchez 1994 who conducted an aggregate analysis of consumer variety seeking behavior across product categories however the results obtained in this paper suggest that consumers are heterogeneous with respect to the processes by which past purchases affect current purchases these results provide strong evidence for habit persistence and variety seeking in brand attributes to be the behavioral source of consumer choice dynamics in food categories thus consumer tastes utility weights seem to be affected by the attributes of the brands consumed in the past given the empirical result that a large proportion of consumers are habit persistent this suggests that tastes are reinforced by the brand attributes consumed in the past the empirical results also show that not accounting for state dependence in market structure models for panel data may produce misleading results that is depending on consumer behavior patterns models that do not account for state dependence may distort the true nature of competition among brands more specifically the results confirm the expectation that if there is habit persistence that is if consumer tastes are reinforced by attributes of brands consumed in the past models that do not capture this choice dynamics will overestimate the distance between similar brands furthermore the policy experiments conducted suggest that 1 static models overestimate the short run impact of a price cut on the sales of the brand on promotion 2 price cuts hurt the sales of the more similar brands more and 3 free samples affect relatively less similar brands the most finally this paper studies variety seeking and habit persistence across brands over purchase occasions however variety seeking behavior may also involve the purchase of a portfolio of brands or items at a purchase occasion consumers may buy multiple items knowing that prior to the next trip they may want to consume different items simanson 1990 walsh 1995 this type of behavior can be modeled within the context of dynamic expected utility maximization with forward looking consumers the development and estimation of market structure models that include forward looking consumers who maximize expected utility over a planning horizon incorporating their future tastes and needs and shopping for an inventory of brands remain an important future research issue

when are banks better than markets comment on zimper 2013 zimper 2013 claims that in the basic diamond dybvig model trade in a competitive asset market can implement the first best i show that the argument of zimper is incorrect as it stands zimper derives his result assuming that the consumers choose investment levels that are individually suboptimal the corrected argument shows that laissez faire markets do not provide any liquidity insurance however if consumers can trade in markets in the banking economy banks do not provide any insurance either whether or not banks are better than markets therefore crucially depends on the extent of trading restrictions

biological conservation in dynamic agricultural landscapes effectiveness of public policies and trade offs with agricultural production article i nfo land use change and land management intensification are major drivers of biodiversity loss especially in agricultural landscapes that cover a large and increasing share of the world s surface incentive based agri environmental policies are designed to influence farmers land use decisions in order to mitigate environmental degradation this paper evaluates the effectiveness of agri environmental schemes for biological conservation in a dynamic agricultural landscape under economic uncertainty we develop a dynamic ecological economic model of agricultural land use and spatially explicit population dynamics we then relate policies subsidies to grassland taxation of agricultural intensity to the ecological outcome probability of persistence of a species of interest we also analyze the associated trade offs between agricultural production in value and biological conservation in probability of persistence at the landscape scale

research needs and challenges in the few system coupling economic models with agronomic hydrologic and bioenergy models for sustainable food energy and water systems on october 12 13 a workshop funded by the national science foundation was held at iowa state university in ames iowa with a goal of identifying research needs related to coupled economic and biophysical models within the few system approximately 80 people attended the workshop with about half representing the social sciences primarily economics and the rest from the physical and natural sciences the focus and attendees were chosen so that findings would be particularly relevant to sbe research needs while taking into account the critical connectivity needed between social sciences and other disciplines we have identified several major gaps in existing scientific knowledge that present substantial impediments to understanding the few system we especially recommend research in these areas as a priority for future funding 1 economic models of decision making in coupled systems deliberate human activity has been the dominant factor driving environmental and land use changes for hundreds of years while economists have made great strides in modeling and understanding these choices the coupled systems modeling literature with some important exceptions has not reflected these contributions several paths forward seem fruitful first baseline economic models that assume rationality can be used much more widely than they are currently moreover the current generation of iams that include rational agents have emphasized partial equilibrium studies appropriate for smaller systems to allow this approach to be used to study larger systems the potential for and consequences of general equilibrium effects should be studied as well second it is important to address shortcomings in these models of economic decision making valuable improvements could be gained from developing coupled models that draw insights from behavioral economics many decision makers deviate systematically from actions that would be predicted by strict rationality but very few iams incorporate this behavior potentially leading to inaccurate predictions about the effects of policies and regulations improved models of human adaptation and induced technological change can also be incorporated into coupled models particularly for medium to long run models decisions about adaptation and technological change will have substantial effects on the conclusions and policy implications but more compelling methods for incorporating these changes into modeling are sorely needed in addition some economic decisions are intrinsically dynamic yet few coupled models explicitly incorporate dynamic models economic models that address uncertainty in decision making are also underutilized in coupled models of the few system 2 coupling models across disciplines despite much recent progress established models for one component of the few system often cannot currently produce outcomes that can be used as inputs for models of other components this misalignment makes integrated modeling difficult and is especially apparent in linking models of natural phenomena with models of economic decision making economic agents typically act to maximize a form of utility or welfare that is not directly linked to physical processes and they typically require probabilistic forecasts as an input to their decision making that many models in the natural sciences cannot directly produce we believe that an especially promising approach is the development of bridge models that convert outputs from one model into inputs for another such models can be viewed as application specific reduced form distillations of a richer and more realistic underlying model ideally these bridge models would be developed in collaborative research projects involving economists statisticians and disciplinary specialists and would contribute to improved understanding in the scientific discipline as well 3 model validation and comparison there is little clarity on how models should be evaluated and compared to each other both within individual disciplines and as components of larger iams this challenge makes larger integrated modeling exercises extremely difficult some potential ways to advance are by developing statistical criteria that measure model performance along the dimensions suitable for inclusion in an iam as well as infrastructure and procedures to facilitate model comparisons focusing on the models out of sample distributional forecasting performance as well as that of the iam overall is especially promising and of particular importance moreover applications of iams tend to estimate the effect of hypothetical future policy actions but there have been very few studies that have used these models to estimate the effect of past policy actions these exercises should be encouraged they offer a well understood test bed for the iams and also contribute to fundamental scientific knowledge through better understanding of the episode in question the retrospective nature of this form of analysis also presents the opportunity to combine reduced form estimation strategies with the iams as an additional method of validation

on the welfare equivalence of asset markets and banking in diamond dybvig economies why do people choose bank deposit contracts over a direct participation in asset markets in their seminal paper diamond and dybvig s 1983 answer this question by claiming that bank deposit contracts can implement allocations that are welfare superior to asset markets equilibria the present paper demonstrates that this claim is false whenever the asset market participants are highly rational

the market for preferences learning processes are widely held to be the mechanism by which boundedly rational agents adapt to environmental changes we argue that this same outcome might also be achieved by a different mechanism namely specialisation and the division of knowledge which we here extend to the consumer side of the economy we distinguish between high level preferences and low level preferences as nested systems of rules used to solve particular choice problems we argue that agents while sovereign in high level preferences may often find it expedient to acquire in a pseudo market the low level preferences in order to make good choices when purchasing complex commodities about which they have little or no experience a market for preferences arises when environmental complexity overwhelms learning possibilities and leads agents to make use of other people s specialised knowledge and decision rules

how similar are alcohol drinkers international evidence stigler and becker 1977 argue that tastes neither change capriciously nor differ importantly between people it is differences in prices and incomes that determine differences in behaviour in this paper we analyse the alcohol consumption patterns of drinkers from 8 industrialized countries we identify a number of empirical regularities and verify stigler and becker s hypothesis that income and price elasticities of demand are international constants by showing that alcohol consumption patterns in the eight countries exhibit intriguing similarities the income and price elasticities of alcohol are found to be about 0 8 and 0 6 respectively in all eight countries

econometric process models for integrated assessment of agricultural production systems this article develops the conceptual and empirical basis for a class of empirical economic production models that can be linked to site specific biophysical models for use in integrated assessment research site specific data are used to estimate econometric production models and these data and models are then incorporated into a simulation model that represents the decision making process of the farmer as a sequence of discrete and continuous land use and input use decisions an econometric process model of the dryland grain production system of the northern plains demonstrates the capabilities of this type of model to simulate decision making both within and outside the range of observed data copyright 2001 oxford university press

futures prices in supply analysis are instrumental variables necessary citation nathan p hendricks joseph p janzen aaron smith futures prices in supply analysis are instrumental variables necessary american journal of agricultural economics volume 97 issue 1 1 january 2015 pages 22 39 https doi org 10 1093 ajae aau062

potential environmental impacts of increased reliance on corn based bioenergy this paper integrates economic and physical models to assess a how increases in agricultural commodity prices driven by ethanol production and other factors affect land use and cropping systems in the us midwest and b how the changes in land use and cropping systems in turn affect environmental quality in the region the empirical framework includes a set of econometric models that predict land conversion crop choices and crop rotations at the parcel level based on commodity prices land quality climate conditions and other physical characteristics at the sites the predictions are then combined with site specific environmental production functions to determine the effect of rising commodity prices on nitrate runoff and leaching soil water and wind erosion and carbon sequestration results suggest that increasing commodity prices will result in widespread conversions of non cropland to cropland fifty percent of the region s pasture and range land will be converted to cropland with 6 corn rising commodity prices will also result in dramatic changes in crop mix and rotation systems in the midwest with 6 corn the total acreage of corn will increase by 23 and 40 in the corn belt and lake states respectively the acreage of continuous corn will increase considerably in both regions as well these changes in land use and crop mix will have a large impact on agricultural pollution approaches to mitigating the environmental impacts are discussed

habits and the anomalies in intertemporal choice this paper analyzes a model of discounted utility under habit formation habit formation means that utility in each period is determined by the difference between the received outcome and the customary outcome at that point in time preferences are rational in the sense that the decision maker correctly anticipates the habit formation process and behaves in a dynamically consistent manner i e plans are truly carried out the purpose is to demonstrate that this generalization of the discounted utility model accounts jointly and in a meaningful way for the most striking anomalies with respect to classical discounted utility theory the common difference effect is explained first this effect also called decreasing impatience effect has usually been viewed as evidence against exponential discounting then the frequently observed preference for increasing sequences of outcomes is examined such preference under the traditional discounted utility model would be regarded as a paradoxical case of negative discounting a discussion of the descriptive prescriptive and normative values of the model is included

habit formation and intertemporal substitution in individual food consumption individual food consumption data are used to examine three issues first is food consumption linked intertemporally at the individual level second does the association between current and past consumption reflect habit or heterogeneity third what do the estimates imply about the intertemporal elasticity of substitution the authors find that habit matters that controlling for heterogeneity reduces estimated habit effects and that the product of the estimated intertemporal elasticity of substitution and the risk aversion parameter is less than one these results all lead to rejection of time separable specifications of intertemporal consumption behavior copyright 1996 by mit press

farm acreage shocks and crop prices an svar approach to understanding the impacts of biofuels the last 10 years have seen tremendous expansion in biofuels production particularly in corn ethanol in the united states at the same time that commodity prices e g corn have experienced significant spikes while supporters claim that biofuels are renewable and carbon friendly concerns have been raised about their impacts on land use and food prices this paper analyzes how us crop prices have responded to shocks in acreage supply these shocks can be thought of as a shock to the residual supply of corn for food using a structural vector auto regression framework we examine shocks to a crop s own acreage and to total cropland this allows us to estimate the effect of dedicating cropland or non crop farmlands to biofuels feedstock production a negative shock in own acreage leads to an increase in price for soybeans and corn our calculations show that increased corn ethanol production during the boom production year 2006 2007 explains approximately 27 of the experienced corn price rise

habit seasonality and time aggregation in consumer behaviour habitual behaviour in consumer demand analysis is generally portrayed via some form of a lagged dependent variable model the purpose of this paper is to explore the implications for habit behaviour of time aggregation this is done by specifying both habit and seasonal components in demand relations the results indicate that much of what has traditionally been identified as habitual behaviour is in fact seasonal effects

the interest elasticity of saving and the functional form of the utility function the interest elasticity of aggregate saving rate is a key parameter for a number of important questions concerning the government s influence on capital formation recently significant attempts have been made to examine and estimate the effects of interest rate changes on aggregate saving hamburger 9 and wright 17 attempted to estimate the interest elasticity of saving subsequent studies have reported divergent results and with the publication of boskin s 5 controversial study the profession has moved away from a consensus on this issue in a challenge to the widely held view that the elasticity is low summers 16 claimed to have formulated a realistic life cycle model yielding a large and positive interest elasticity of saving in fact he made the strong claim that the theory when formulated realistically implies interest elasticities well in excess of unity 16 534 the claim has been questioned by evans 7 who showed that with negative time preferences the interest elasticities are far lower furthermore he incorporated intergenerational transfers into the model and demonstrated that negative elasticities are not implausible seidman 13 introduced bequests into the model and obtained results that are qualitatively similar to those of summers the studies by summers 16 evans 7 and seidman 13 share a common feature in that each employed a standard homothetic ces utility function shces to represent the preferences of the individual none of these authors addressed the issue of the interest elasticity of saving in relation to alternative functional forms of the utility function a natural and fruitful way of generalizing the utility function considered by these authors is to introduce minimum or subsistence consumption levels as its argument according to the literature on consumer theory utility functions that make allowance for subsistence consumption levels are desirable for various reasons first to capture the notion that consumers require some minimal consumption levels for physiological and psychological needs in order to survive second to account for the habit forming nature of some goods and to make allowance for the future habit forming effect of current consumption third to reflect the fact that some consumption expenditures are contractually fixed and therefore prevent consumers from adjusting some portion

world food demand long term projections of global food demand are heavily dependent on which functional form of the food demand equation is used given that real incomes can change substantially over the long term key elements are the dependence of the income elasticity on income which ensures that the food budget share always lies within the 0 1 range and the role of income inequality this article analyzes these issues proposes a new functional form that deals with them and presents estimates of income and price elasticities for food in 138 countries copyright 2012 oxford university press

rational habit formation abstract this paper discusses consumer demand under rational habit formation if consumer tastes change endogenously through habit stocks depending on past consumption the rational consumer will make allowance of the future habit forming effects of current consumption a model with rational habit formation is made formally equivalent to an intertemporal consumer model without habit formation by redefining the cost of consumption and wealth the cost of consumption is obtained by adding the cost of future induced consumption to the rental price of the commodity the extended wealth concept is obtained by subtracting the cost of the initial stocks of habits and the cost of future physically necessary consumption from wealth the paper also investigates the implication of rational habit formation for constructing one period cost of living indices

a general framework for the analysis of preference variation the traditional approach to changing preferences introduced a vector of shift variables in the utility function but was confronted with the problem of specifying the effects of changes in these variables on the marginal utilities the new theory of demand introducing intervening variables characteristics basic commodities offers an attractive and psychologically richer way of describing preferences changes it is however difficult to operationalise and the use of shadow prices in a two stage decision procedure raises some difficult theoretical problems in this paper we try to integrate the two approaches we start from the traditional framework but use the specification of the household technology to specify changes in the marginal utilities of the market goods in this way we get a very general model from which most existing definitions of preference changes can be derived as special cases this is illustrated with an analysis of habit formation the effect of quality changes in a lancaster setting and the content of advertising messages use of the model makes it possible to gain some new insights in each of these cases

adaptation to poverty in long run panel data we consider the link between poverty and subjective well being and focus in particular on potential adaptation to poverty we use panel data on almost 45 800 individuals living in germany from 1992 to 2011 to show first that life satisfaction falls with both the incidence and intensity of contemporaneous poverty we then reveal that there is little evidence of adaptation within a poverty spell poverty starts bad and stays bad in terms of subjective well being we cannot identify any causes of poverty entry which are unambiguously associated with adaptation to poverty

limits to substitution and irreversibility in production and consumption a neoclassical interpretation of ecological economics abstract there are many methodological approaches within ecological economics one of the principal modes of analysis is a modified version of the standard neoclassical model this paper examines the parallels which emerge between the ideas of some ecological economists concerning production and the ideas of others concerning consumption when these ideas are interpreted in the neoclassical paradigm it is well known that ecological economics is characterized by arguments concerning limits to substitution between inputs energy natural capital etc vs manufactured capital labor etc in production and the implications these have for sustainability however various authors have also expressed concerns regarding limits to substitution in consumption either between environmental assets and other goods or between basic needs commodities and other goods though the specific reasons for non substitution are different in the production and consumption cases the underlying theme is that individual commodities and other inputs have unique physical or other properties which make them poor substitutes ideas about irreversibility in production and economic development are also prominent in ecological economics likewise many authors have argued for similar irreversibilities in consumption behavior in analogy to the term technological change i coin the term preferential change to describe these phenomena the linking themes in this case are that the economy environment system is evolutionary in character and that external effects intended and unintended consequences of actions or processes imposed on other parties or resources are all pervasive

interactions between agricultural and environmental policies a conceptual framework agricultural policy has a well documented impact on farmers production decisions and those decisions land water and agricultural chemical use may in turn affect the environment there is a public perception that existing agricultural policies are linked to agricultural pollution as exemplified by the conclusions of the recent national research council report alternative agriculture 1989 there is only limited theoretical or empirical research addressing these linkages however this paper develops a conceptual framework that can be used to analyze the interactions between agricultural and environmental policies and pollution this framework integrates physical and economic models at a disaggregate level necessary to capture the heterogeneity of the physical environment and the economic behavior of farmers following e hochman and d zilberman 1978 the disaggregate units can be statistically aggregated to a level useful for policy analysis agricultural and environmental policies can be categorized according to their effects on the intensive and extensive margins combining the different policy instruments with the microeconomic heterogeneity we find that existing agricultural and environmental policies can have either positive or negative effects of nonpoint source pollution to infer an aggregate effect requires data that do not currently exist our framework provides a basis for empirical investigations of these effects given adequate data moreover we find that agricultural policy instruments can be used to mitigate pollution if used appropriately

incentive payments to encourage farmer adoption of water quality protection practices farmers can be encouraged to voluntarily adopt environmentally sound management practices through the use of incentive payments this paper uses both a bivariate probit with sample selection model and a double hurdle model on data from a survey of farmers to predict farmer adoption of the practices as a function of the payment offer the five management practices addressed here are integrated pest management legume crediting manure testing split applications of nitrogen and soil moisture testing also estimated are models that predict the acreage on which these practices would be applied given the decision to accept the incentive payments estimated