women s access to credit does it matter for household efficiency studies that assess the impact of credit constraints on farm households efficiency have largely used the household as the unit of analysis this can be problematic when there are gender based market imperfections and asymmetries in how rights resources and responsibilities are distributed within the household constraints on women matter in addition to the efficiency loss associated with the husbands credit constraints when women are unable to meet their needs for capital their households experienced an additional 11 drop in efficiency this suggests that there are efficiency based arguments for enhancing women s access to capital and that studies based only on the household s head may significantly underestimate the true economic impact of credit constraints copyright 2008 oxford university press

rethinking ecosystem services to better address and navigate cultural values ecosystem service approaches have become a prominent basis for planning and management cultural services and non use values are included in all major typologies and present some of the most compelling reasons for conserving ecosystems though many barriers exist to their explicit characterization the values that conform least well to economic assumptions variously lumped together with as cultural services have proven elusive in part because valuation is complicated by the properties of intangibility and incommensurability which has in turn led to their exclusion from economic valuation we argue that the effectiveness of the ecosystem services framework in decision making is thwarted by i conflation of services values and benefits and ii failure to appropriately treat diverse kinds of values we address this challenge by 1 distinguishing eight dimensions of values which have implications for appropriate valuation and decision making 2 demonstrating the interconnected nature of benefits and services and so the ubiquity of intangible values 3 discussing the implications of these propositions for ecosystem services research and 4 outlining briefly a research agenda to enable decision making that is ecologically appropriate and socially just because many ecosystem services co produce cultural benefits full characterization of services must address non material values through methods from diverse social sciences

agricultural household models extensions applications and policy this book presents the basic model of an agricultural household that underlies most of the case studies undertaken so far the model assumes that households are price takers and is therefore recursive the decisions modeled include those affecting production and the demand for inputs and those affecting consumption and the supply of labor comparative results on selected elasticities are presented for a number of economies the empirical significance of the approach is demonstrated in a comparison of models that treat production and consumption decisions separately and those in which the decisionmaking process is recursive the book summarizes the implications of agricultural pricing policy for the welfare of farm households marketed surplus the demand for nonagricultural goods and services the rural labor market budget revenues and foreign exchange earnings in addition it is shown that the basic model can be extended in order to explore the effects of government policy on crop composition nutritional status health saving and investment and to provide a more comprehensive analysis of the effects on budget revenues and foreign exchange earnings methodological topics primarily the data requirements of the basic model and its extensions along with aggregation market interaction uncertainty and market imperfections are discussed the most important methodological issues the question of the recursive property of these models is also discussed

ecological economic analysis of wetlands scientific integration for management and policy abstract wetlands all over the world have been lost or are threatened in spite of various international agreements and national policies this is caused by 1 the public nature of many wetlands products and services 2 user externalities imposed on other stakeholders and 3 policy intervention failures that are due to a lack of consistency among government policies in different areas economics environment nature protection physical planning etc all three causes are related to information failures which in turn can be linked to the complexity and invisibility of spatial relationships among groundwater surface water and wetland vegetation integrated wetland research combining social and natural sciences can help in part to solve the information failure to achieve the required consistency across various government policies an integrated wetland research framework suggests that a combination of economic valuation integrated modelling stakeholder analysis and multi criteria evaluation can provide complementary insights into sustainable and welfare optimising wetland management and policy subsequently each of the various components of such integrated wetland research is reviewed and related to wetland management policy

anomalies and stated preference techniques a framework for a discussion of coping strategies this paper introduces a symposium on the issue of how stated preference sp research can best cope with anomalies i e systematic deviations from the predictions of standard economic theory in survey responses it proposes a framework for constructive debate recognising i the legitimate aspirations of sp research ii the relevance of evidence from sources other than best practice sp and iii the precautionary value of investigating strategies for coping with suspected anomalies even if questions about the robustness of anomalies have not been finally resolved five alternative coping strategies discussed in more detail in the symposium are briefly introduced

a conservation industry for sustaining natural capital and ecosystem services in agricultural landscapes conservation investment in agricultural landscapes has evolved to take a more market based or business approach however current levels of conservation investment are not likely to mitigate degradation to natural capital and ecosystem services we propose the further evolution of a conservation industry to generate substantially increased investment in conservation in agricultural landscapes particularly from the private sector a mature conservation industry is envisaged as comprising of investors producers and service providers who produce conservation products and services exchanged via market transactions a number of requirements for a viable and effective conservation industry are identified including institutional infrastructure conservation market institutions and regulatory systems information provision quantifying benefits business models and accounting and auditing standards and facilitation entrepreneurship incubation and capacity building a conservation industry requires careful design and planning in order to operate effectively whilst it is not without risk a conservation industry has the potential to increase participation and investment in conservation actions and enhance the sustainability of agricultural landscapes

the ecosystem services framework and natural capital conservation work at the interface of ecology and economics has inspired a major transformation in the way people think about the environment increasingly ecosystems are seen as capital assets with the potential to generate a stream of vital life support services meriting careful evaluation and investment we first present the concepts underpinning the ecosystem services framework esf laying out the scope and limitations of the approach we then describe the major challenges in making the esf operational i detailed information at scales relevant to decision making ii practical know how in the process of institutional design implementation and iii compelling models of success in which economic incentives are aligned with conservation we close with a brief review of pioneering experiments now underway worldwide which illustrate how these challenges can be overcome

an ecosystem service dominant logic integrating the ecosystem service approach and the service dominant logic abstract natural and business ecosystems are complex and dynamic service systems that interact through the utilization of ecosystem service offerings for human well being currently natural and business sciences have not developed a shared and common set of service based terms or concepts for discussing ecosystem service offerings in the process of value co creation in this study the ecosystem service approach was compared with marketing science s service dominant logic the terminology and concepts were harmonized and the two approaches were then integrated into a service dominant value creation svc framework the incorporation of natural ecosystems includes accounting for the flow of positive and negative impacts through associated value networks therefore the term value in impact was proposed to describe these value flows a case study of the global forest based sector was then presented demonstrating how to discuss current research challenges using the proposed framework in conclusion a shared service dominant approach provides an opportunity for deeper inter disciplinary discussion between natural and business sciences this study represents a contribution towards the development of a holistic service science that includes consideration for natural ecosystems the svc framework also addresses many of the multidimensional challenges noted by previous sustainability frameworks

valuing nature lessons learned and future research directions this paper critically reviews the literature on environmental valuation of ecosystem services across the range of global biomes the main objective of this review is to assess the policy relevance of the information encompassed by the wide range of valuation studies that have been undertaken so far published and other studies now cover most ecosystems with aquatic and marine contexts attracting the least attention there is also a predominance of single function valuation studies studies valuing multiple functions and uses and studies which seek to capture the before and after states as environmental changes take place are rare by and large it is the latter types of analyses that are most important as aids to more rational decision taking in ecosystem conservation versus development situations involving different stakeholders local national and global aggregate global scale estimates of ecosystems value are problematic given the fact that only marginal values are consistent with conventional decision aiding tools such as economic cost benefit analysis in general valuation data provide prima facie support for the hypothesis that net ecosystem service value diminishes with biodiversity and ecosystem loss balmford et al 2002 science 297 p 950 future research effort should include complementary research on multiple ecosystem services that seeks to capture the temporal disturbance profile and its causal factors the explicit recognition of multiple interdependent ecosystem services and values poses both conceptual and empirical research challenges it would serve to transform the practice of research in this sub field via the a priori assumption of multiple and inter dependent use instead of independent single use this line of reasoning can then be extended to the institutional arrangements that determine which values are captured new institutional processes and arrangements are probably required in order to best realise benefit streams from multiple ecosystem use and non use provision across a range of different stakeholders

who is credit constrained in the u s economy an important assumption of the life cycle model of consumption is the postulate of perfect capital markets this hypothesis has recently been challenged by substantial empirical evidence hall and mishkin 1982 using the panel study of income dynamics estimate that 20 percent of united states families are liquidity constrained mariger 1986 derives a life cycle model with endogenous liquidity constraints and using a cross section estimates this fraction to be 19 4 percent hubbard and judd 1986 simulate a model with a constraint on net worth which shows that with reasonable assumptions about preferences 19 0 percent of united states consumers are liquidity constrained the emerging consensus points therefore to a fraction of approximately 20 percent of the population behaving in a manner that is inconsistent with the pure life cycle model in addition hayashi 1985 and zeldes 1989 investigate the correlation among consumption wealth and income for various population groups and infer that liquidity constraints are more important for younger families with low levels of wealth and saving the main limitation of these studies is that in their data sets constrained consumers are not observable and have to be identified via indirect evidence thus there is as yet little firm evidence about the characteristics of the consumers who are likely to be credit constrained this paper adopts an approach that differs from previous tests for liquidity constraints because it makes use of data where constrained consumers are observable and explicitly links their existence to credit market imperfections and personal characteristics the data drawn from the 1983 survey of consumer finances scf and described in section ii provide information on individuals whose request for credit has been rejected by financial intermediaries in section iii a model is developed in which consumers and lenders behavior jointly determines the probability that a consumer is rationed in the credit market this probability is then

empirical measurement of credit rationing in agriculture a methodological survey empirical analysis of rural credit market failure has been of key scientific and political interest in recent years the aim of this article is to give an overview of the various methods for measuring credit rationing that are employed in the literature furthermore the methods are subjected to a comparative evaluation of their specific strengths or shortcomings six approaches are distinguished measurement of loan transaction costs analysis of qualitative information collected in interviews analysis of quantitative information collected in interviews using the credit limit concept analysis of spill over effects with regard to secondary credit sources econometric household modeling and the econometric analysis of dynamic investment decisions an explicit comparison with a first best solution is impossible in the first three approaches since they essentially rely on a subjective assessment of borrowers access to credit based on qualitative or quantitative indicators the fifth and sixth approaches allow a rigorous interpretation in the framework of neoclassical equilibrium theory the fourth approach takes an intermediate position since spill over on segmented loan markets reveals a willingness to pay with regard to the supposedly less expensive but rationed primary source the approaches are fairly data demanding in general usually requiring specific data on loan transactions even so most approaches are applicable to cross sectional household data with the exception of the first all methods surveyed might plausibly be used to empirically detect credit rationing

indices of biotic integrity in stated preference valuation of aquatic ecosystem services stated preference surveys often give minimal attention to distinctions between intermediate and final ecosystem services leading to the potential for welfare estimates that overlook misrepresent or double count associated values this paper illustrates potential mechanisms through which multimetric indexes of the type developed in the ecological literature here an index of biotic integrity can be used within stated preference survey scenarios to both improve the validity of survey responses and provide otherwise unavailable information on willingness to pay for intermediate and final ecosystem services we illustrate the approach using a choice experiment application to the restoration of migratory fish in a rhode island watershed where assumptions of the model hold results can allow transparent disentanglement and estimation of marginal values for both intermediate and final ecosystem services

the welfare economic theory of green national accounts this paper takes a critical look at the literature on green national accounts the problem studied is to find a linear index of economic variables that responds to perturbations in the same direction as social well being the thesis of a large literature that net national product which is a flow is that index in closed economies is shown in some interpretations to be simply false and in others to suffer from deep estimation problems it is argued that capital depreciation using shadow prices should certainly be included in national accounts but that the right welfare index is a comprehensive measure of wealth defined as the shadow value of an economy s stock of all capital assets it is shown that comprehensive wealth is usable as a criterion for policy evaluation as well as for determining sustainable economic development

rural women s access to credit market imperfections and intrahousehold dynamics summary credit rationing studies carried out at the household level and based on responses from male heads of households present an incomplete and biased assessment of who is likely to be constrained why they are constrained and what is the extent of the constraints they ignore possibly conflictive intrahousehold dynamics and assume that imperfections in rural financial markets are gender neutral this paper addresses both issues theoretically and empirically the semi cooperative household model developed for this analysis formalizes the conditions under which spouses and particularly women s individual access to credit can be affected by their own position in the financial market as well as by intrahousehold dynamics these notions are then explored empirically using husbands and wives individual perceptions of their access to credit in rural paraguay the most significant empirical findings of the paper are that i compared to men women are more likely to be credit constrained ii women s rationing status responds to a different set of factors than men s and iii husbands may choose not to intermediate capital to their wives even when they are able to do so results from this exercise provide empirically sound support for the assumptions underlying women targeted credit programs

valuing ecosystem services on the basis of service providing units a potential approach to address the endpoint problem and improve stated preference methods abstract standardized methods are required to measure ecosystem services in order to value them in this paper we argue that the service providing unit spu concept may help achieve this objective by promoting the systematic quantification of the key components of nature that provide services e g population density of a key pollinator and linking these with measurable outcomes for human well being we discuss and provide examples of the potential role of the spu concept in improving economic valuation of ecosystem services further we suggest the concept may contribute to addressing the endpoint problem which can be defined simply as the inability of researchers to communicate the implications of environmental change in a way that is understood by a broad cross section of society the endpoint problem is of particular relevance to stated preference approaches and we discuss the capacity of the spu concept to refine these approaches we argue that the concept enhances interdisciplinary collaboration promoting more validated well informed valuation applications it also has the potential to minimize warm glow effects and put the notion of marginal changes in the provision of ecosystem services in a new light

gender agricultural production and the theory of the household virtually all models of the household assume that the allocation of resources is pareto efficient within many african households agricultural production occurs on many plots controlled by different members of the household pareto efficiency implies that factors should be allocated efficiently across these plots i find in contrast that plots controlled by women are farmed much less intensively than similar plots within the household controlled by men the estimates imply that about 6 percent of output is lost because of inefficient factor allocation within the household the paper suggests a new approach to modeling intrahousehold allocation consistent with the empirical results

direct elicitation of credit constraints conceptual and practical issues with an application to peruvian agriculture abstract this article provides a methodological bridge leading from the well developed theory of credit rationing to the less developed territory of empirically identifying credit constraints we begin by developing a simple model showing that credit constraints may take three forms quantity rationing transaction cost rationing and risk rationing each form adversely affects household resource allocation and thus should be accounted for in empirical analyses of credit market performance we outline a survey strategy to directly elicit households status as unconstrained or constrained in the credit market and if constrained to further identify which of the three nonprice rationing mechanisms is at play we discuss several practical issues that arise due to the use of a combination of factual and interpretative survey questions finally using a farm level data set from peru we illustrate how the methodology can be used to estimate the impacts of credit constraints

a dynamic approach to pes pricing and finance for interlinked ecosystem services watershed conservation and groundwater management a theory of payment for ecosystem services pes pricing consistent with dynamic efficiency and sustainable income requires optimized shadow prices since ecosystem services are generally interdependent this requires joint optimization across multiple resource stocks we develop such a theory in the context of watershed conservation and groundwater extraction the optimal program can be implemented with a decentralized system of ecosystem payments to private watershed landowners financed by efficiency prices of groundwater set by a public utility the theory is extended to cases where land is publicly owned conservation instruments exhibit non convexities on private land or the size of a conservation project is exogenous in these cases conservation investment can be financed from benefit taxation of groundwater consumers while volumetric conservation surcharges induce inefficient water use a dynamic lump sum tax finances investment without distorting incentives since the optimal level of conservation is generated as long as payments are correct at the margin any surplus can be returned to consumers through appropriate block pricing the present value gain in consumer surplus generated by the conservation induced reduction in groundwater scarcity serves as a lower bound to the benefits of conservation without explicit measurement of other benefits such as recreation biodiversity and cultural values

degradacao ambiental e teoria economica algumas reflexoes sobre uma economia dos ecossistemas there are few consistent theoretical reflections on the suitability of economic instruments per se in facing the issue of natural capital degradation this paper presents some considerations about the relationship between environmental degradation and economic theory in a critical perspective the guiding assumption of the arguments is that the treatment given so far to the environment is largely reductionist which must necessarily be overcome by a transdisciplinary approach the sequencing of the ideas outlined converges to the need of building this new framework referred to here as economics of ecosystems

mass tourism and the demand for protected natural areas a travel cost approach abstract this paper presents the argument that when environmental protection projects favor tourist activities the travel cost method can be used to measure the value tourists give to the recreational services these areas provide with this idea we describe a model of tourist behavior that allows us to predict whether a tourist will participate in the reactional activities the frequency of participation according to the areas attributes and the costs of producing alternatives to illustrate the model s application we consider tourist demand for and benefits from a set of protected natural areas in mallorca

the mobilization of women s labor for cash crop production a game theoretic approach in the last decade or so economists have modeled phenomena such as household labor supply fertility behavior and child survival rates using the household as the unit of analysis this paper presents data that call into question the assumption that the household is a joint decision making unit which maximizes a neoclassical household utility function the data come from a study of the mobilization of women s labor by their husbands for irrigated rice production in north cameroon the first section of this paper describes briefly the massa rice and sorghum farming system and then considers the relationship between the amount of compensation women receive from their husbands for their labor on rice production and the amount of labor they allocate to rice production the findings suggest that a bargaining model may describe the intrahousehold relations of production and distribution better than the neoclassical model the second section specifies a nash bargaining model and contrasts it with the neoclassical model of the household using the bargaining framework the third section explores in more detail possible explanations of the allocative inefficiency which seems to characterize many of the rice cultivating households

institutional incentives for managing the landscape inducing cooperation for the production of ecosystem services abstract agricultural landscapes hold tremendous potential for producing a diverse stream of ecosystem services yet because the spatial configuration of particular ecosystems is critical to the supply of many services realizing this potential requires that farms be managed in a coordinated way across landscapes rather than as independent units under existing incentive programs this level of coordination is typically neither required nor encouraged here we explore how to achieve such coordination from an institutional perspective using voluntary incentives rather than regulation we focus on three services operating at contrasting scales from local to global pollination hydrologic services and carbon sequestration first we briefly illustrate how agricultural practices can diminish or enhance their provision next we show how all three services require coordinated landscape scale management because provision depends upon particular spatial configurations of which we provide several stylized examples finally based on these stylized configurations we evaluate the relative merits of three incentive designs the cooperation bonus the entrepreneur and the ecosystem service district to promote cross farm cooperation to enhance service provision all three incentive systems rely on rational self interest have cooperative configurations to promote ecosystem services across different scales use tiered reward systems and have a major voluntary element they are distinct in certain key features the cooperation bonus system rewards conservation even without cooperation but adds a bonus for cooperation in the entrepreneur incentive all tiers of reward are contingent upon cooperation the ecosystem service district scheme is only partially voluntary and forces cooperation of all landowners once the district is formed our analysis of these heuristic alternatives integrates biophysical economic and institutional factors with the aim of addressing the suite of institutional barriers for landscape scale management

do we really care about biodiversity this paper addresses from an economic perspective the issue of global biodiversity conservation it challenges the perception that the world really cares a great deal about biodiversity and is prepared to pay the full cost of maintaining this stock of natural capital despite the existence of a plethora of international agreements there still seems to be a global deficit of care surrounding efforts to combat challenges such as those posed by global warming and biodiversity conservation more light can be thrown on the degree of care by measuring both the actual expenditures and the stated willingness to pay for biodiversity conservation however actual expenditures are much lower than willingness to pay estimates recorded in the published literature using the criteria that the right amount of conservation effort is one where the marginal economic benefits from conservation just equal the marginal costs of conservation the paper explores the biodiversity conservation conundrum and concluded that on the available evidence the world does not care too much about this natural capital stock and bequests to future generations

farm size relative efficiency and agrarian policy in cote d ivoire profit function analysis of rice farms abstract this paper examines the relative economic efficiency of small and large rice farms in cote d ivoire using a profit function approach no differences in the relative economic efficiency of small and large farms were found this conclusion is robust under alternative model specifications agrarian reforms directed towards further concentration of landholding for large farms in cote d ivoire cannot be justified based on economic efficiency results show that access to credit and use of modern rice varieties significantly increase profits to improve technical efficiency of rice farms an accelerated program to provide information credit improved seeds and other inputs is needed when all the farms i e large and small are taken together there is evidence of allocative inefficiency strategies are needed to remove such management related inefficiencies in rice production either through the development of a better market price information system or effective farmer oriented technical training programs by rice extension workers