On the Consumer Value of Diversity: An Application to Italian Fish

This article investigates the consumer value of diversity both conceptually and empirically. It proposes a measure of diversity value based on a benefit function. It shows that the consumer value of diversity can arise from complementarity and/or convexity effects among consumer goods. The usefulness of the approach is illustrated by an application to fish in Italy. The investigation illustrates the role played by both convexity and complementarity in the valuation of diversity. The empirical evidence shows the importance of dynamics. It also documents how the value of diversity varies depending on the bundles considered.     

On Measuring the Value of a Nonmarket Good Using Market Data

We use line integral theory to lay out in a more general theoretical framework the conditions under which it is possible to measure with market data the welfare effects of a change in a nonmarket good. We present in detail a numerical method of measuring the value of nonmarket goods using market data, under either weak neutrality or weak complementarity. Our numerical method is more flexible than the existing analytical method because it can be used with any well-behaved Marshallian demand function, and can be used even when the willig condition does not hold.     

A Diagrammatic Exposition of Weak Complementarity and the Willig Condition

This article provides a graphical explanation for one of the most important restrictions to utility functions used in revealed preference approaches for measuring the demand for public goods and product quality—weak complementarity. It also describes how the Willig condition is an important element along with weak complementarity in measuring Hicksian consumer surplus for changes in public goods or quality using Marshallian demand curves.     

The declining price anomaly in sequential auctions of identical commodities with asymmetric bidders: empirical evidence from the Nephrops norvegicus market in France

The declining price anomaly for sequential sales of identical commodities challenges auction theory which predicts constant prices within a day. Among other hypotheses explaining the phenomenon stands the dual value of goods including a risk premium in early transactions. We consider that asymmetric bidder groups (primary processors, fishmongers, supermarket buyers) and seasonal landings may also affect the daily price pattern. On the basis of stylized facts and several panel data models, this hypothesis is tested on a Redundant French fish market of homogenous goods (live Nephrops norvegicus) when the time effects (high and low seasons, weekday effect) affecting the demand and supply conditions are taken into consideration. All models support the evidence of a daily declining pattern, but not to the same extent for all days and seasons, and all categories of buyers. Our results also show an earlier and steeper decline on periods of lower supply (or higher demand), supporting the theoretical hypothesis of risk‐averse behaviors of bidders, especially fishmongers with respect to primary processors and supermarkets.     

Multifunctionality of agriculture: an inquiry into the complementarity between landscape preservation and food security

Without support, the levels of agricultural public goods suchas food security and landscape preservation would fall shortof demand in high-cost countries. However, as demonstrated byNorway as a case study, the current level of support is disproportionatefrom a public goods perspective, and the policy instrumentsare badly targeted at the public goods in question. Becauseagricultural land is a major component of both food securityand landscape preservation, giving rise to a high degree ofcost complementarity between the public goods, it would be moreefficient to support land-extensive production techniques thanproduction per se.     

THE CASE AGAINST COMPULSORY MINIMUM STANDARDS

Legislation to forbid the sale of goods that do not meet minimum standards imposes substantial costs on producers, distributors and consumers, but the main benefit, a reduction in search costs, is unimportant unless the standard affects health or safety. Benefits also arise when someone other than the consumer bears the cost of inferior goods. In the longer run, production levels and methods may change but economic costs will probably remain above the free market levels. In the short or long run consumers may benefit by being able to buy better quality goods at the same price, but this is unlikely so the onus is on the legislator to justify imposing compulsory minimum standards.     

Is public investment complementary to private investment in Indian agriculture? Evidence from NARDL approach

The issue of complementarity between public farm investment and private farm investment in Indian agriculture is an unsettled empirical question in the literature, which has not been studied adequately. Few studies analyzing the trends of both types of investments have produced contradictory results. Thus, this study attempts to bridge that gap, by examining the hypothesis of crowding‐in/crowding‐out effect of public sector investment on private investment. Time series data for a period of 45 years from 1971 to 2015 has been used. Adopting a ‘nonlinear auto‐regressive distributive lag’ (NARDL) model the study confirms a strong crowding‐in effect of public investment on private investment in short run, but relatively a weak complementarity between the two over long‐run. Moreover, the public canal intensity as a major component of public investment has been observed to have much stronger effect on private investment than the public investment itself. It is also found that private investment is constrained by its own lagged values, institutional credit and terms of trade during both short‐run and long‐run. The policy suggestion of this study calls for an immediate arrest of declining trend of public investment.     

海洋捕捞作业影响因素判别及其作用机理

市场经济条件下,海洋捕捞主体生产行为的最优选择是其自身海洋捕捞作业技术水平、海洋捕捞物资性价比、海洋自然渔业资源存量、作业海域生态环境质量、作业海域自然气候条件、渔获物商品化程度和水产市场价格体系综合作用的结果。在其它因素相对不变的条件下,仅有反映水产市场价格体系变化的捕捞物资价格与渔获物价格的比值与海洋捕捞作业规模呈反向关系,其余六个变量均与海洋捕捞作业规模呈正向关系。     

PRODUCER RISK,PRODUCT COMPLEMENTARITY AND PRODUCT DIVERSIFICATION

In this paper, a model is presented of the product diversification problem which features both producer risk aversion and product complementarity as determinants of product diversification. Although both risk aversion and product complementarity are, in the absence of the other, incentives to diversity production, when the two are present their joint influence may create a disincentive to diversification. In particular, an increase in the value of product complementarity may result in reduced product diversification for a risk-averse producer.     

Externalities in the agricultural export sector and economic growth: a developing country perspective

For years economists have ignored the diversity in agriculture and its potential to increase long run growth rates by enhancing a country's knowledge base. Non-traditional agriculture requires significant investments in the infrastructure and knowledge; and therefore, has the potential to increase long run growth rates. Policy makers in developing countries have tended to enact macroeconomic policies designed to enhance the manufacturing sector at the expense of the agricultural sector. A theoretical model is developed to explain the dynamics between two non-traditional export sectors and the long run economic growth of the country. The model illustrates that growth in highly perishable agricultural exports, not domestic production of manufactured goods, can potentially lead to higher long run growth rates. The model is applied to the fruit and flower industries in Colombia to bring forth an example with real world relevance.     

Advertising and food, drink and tobacco consumption in the United Kingdom: a dynamic demand system

This paper tests for the influence of advertising on the inter‐product distribution of consumer demand for non‐durable goods and services in the UK, 1963–1996. The long‐run demand for seven categories of non‐durable products is modelled through an advertising‐augmented version of the almost ideal demand system (AIDS), which is incorporated into an error‐correction model to allow for short‐run dynamic adjustments to long‐run equilibrium positions. Model estimates confirm that the restrictions of price homogeneity and symmetry appear to be consistent with the data, yield measures of the various types of demand elasticity that are in general plausible, confirm the strong influence of prices on the allocation of consumer expenditure, but find little evidence to support the hypothesis that advertising has the power to effect marked changes in the inter‐product pattern of consumer demand in the UK.     

自然资源生态产品价值实现机制：一个机制复合体的分析框架

研究目的：探索自然资源生态产品价值实现机制复合体的分析框架。研究方法：案例分析法、比较分析法和归纳总结法。研究结果：（1）自然资源生态产品价值实现机制以交易主体、支付标准测度和价值实现方式选择为核心要件,并面临生物物理界限、制度界限、伦理界限和权利界限的权衡;（2）科层化实现、市场化实现和NGO实现三个基本机制各有其适用空间和局限性,且逐渐显现机制嵌构趋向,但组织网络仍呈碎片化样态;（3）机制复合体理论以制度性嵌入、规范性嵌入和关系性嵌入为关键性功能要素,将其引入自然资源生态产品价值实现机制的分析形成的机制复合体,基本框架表征为价值实现主体的多元化、支付责任分担的公平性和价值实现方式的网络化。研究结论：以政府主导型公—私—社合作伙伴实现机制为核心、多种价值实现机制并存的机制复合体,是中国自然资源生态产品价值实现机制演进的方向。     

Quasi- and Simulated-Likelihood Approaches to Censored Demand Systems: Food Consumption by Food Stamp Recipients in the United States

A quasi-maximum-likelihood estimator is proposed and applied to a censored Translog demand system for foods, using a sample of food stamp recipients in the United States. The procedure produces remarkably close parameter and elasticity estimates to those of the simulated-maximum-likelihood procedure. A two-step procedure is also considered but it produces different elasticities. Demands are found to be price elastic for pork and fish but price inelastic for all other food products. Gross complementarity and net substitutability are obvious but these cross-price effects are much less pronounced than own-price and total food expenditure effects.     

Using Ex Ante Approaches to Obtain Credible Signals for Value in Contingent Markets: Evidence from the Field

While contingent valuation remains the only option available for measurement of total economic value of nonmarketed goods, the method has been criticized due to its hypothetical nature. We analyze field experimental data to evaluate two ex ante approaches to attenuating hypothetical bias, directly comparing value statements across four distinct referenda: hypothetical, "cheap talk,""consequential," and real. Our empirical evidence suggests two major findings: hypothetical responses are significantly different from real responses; and responses in the consequential and cheap talk treatments are statistically indistinguishable from real responses. We review the potential for each method to produce reliable results in the field.     

Land Heterogeneity,Agricultural Income Forgone and Environmental Benefit: An Assessment of Incentive Compatibility Problems in Environmental Stewardship Schemes

This paper examines the issue of incentive compatibility within environmental stewardship schemes, where incentive payments to farmers to provide environmental goods and services are based on foregone agricultural income. The particular focus of the paper is land heterogeneity, either of agricultural or environmental value, leading to divergence between the actual and socially optimal level of provision of environmental goods and services. Given land heterogeneity, such goods and services are likely to be systematically over‐ or under‐provided in response to a flat rate payment for income foregone.     

Specialization,diversification, and productivity: a panel data analysis of rice farms in Korea

This article examines the microeconomics of productivity associated with specialization/diversification in production activities, with an application to Korean rice farms. Korean rice farms tend to be very small and highly specialized. Our analysis examines the productivity effects associated with both farm size and farm specialization/diversification in Korean agriculture. Relying on farm‐level panel data, the analysis studies farm productivity in a multi‐input multi‐output context, accounting not only for changes in inputs and technical change in rice production, but also for the role of diversification in the production of other crops in current and previous periods. We find positive but small productivity gains from farm diversification. These gains come mostly from complementarity effects across farm outputs, with minimal effect of scale economies. The positive complementarity effects work against nonconvexity effects, which provide strong productivity incentives for rice farms to specialize.     

The connection between fisheries resources and spatial land use change: The case of two New England fish ports

This study examined interactions between targeted fish populations, aspects of the fishing industry and land use changes along two ports in New England. By tracking changes in land uses over a two-decade period using parcel level data and geographic information system (GIS) tools, we examined the relationship of changes in species biomass, landings and other fishing industry variables to community spatial change. Using logistic regression models we assessed the impacts on essential infrastructure for continued fishing industry activity. Our findings have implications for land use policy that should accompany efforts being made to rehabilitate fish stocks; it should ensure that current marine infrastructure will remain in place to support the fishing industry if and when species rebound. Our models show that in New Bedford Harbor, the larger of the two ports, increasing scallop biomass (considered a long-term factor) is associated with the increase of marine-related land uses. In Provincetown Harbor, short-term factors, such as value and volume of fish landings as well as stock sizes, influence land use change. These findings suggest that the smaller port (Provincetown) is more vulnerable to market conditions and therefore in need of greater land use controls to prevent the conversion of marine-related uses. We propose some directions for further research and present the methodology used as one that can be applied to research questions of a similar nature.     

实物期权在水利项目投资决策中的应用初探

分析对水利建设项目投资决策比较重要的3个经济效果评价指标：项目的投资回收期、净现值、内部收益率的特点,指出目前这3个指标存在的不足之处;通过对实物期权的性质及适用条件的分析,论证实物期权方法应用于水利建设项目投资决策中的必要性和可行性.     

Civil war,public goods and the social wealth of nations

This paper establishes and explores the implications of a somewhat surprising empirical finding. Although civil war adversely affects the performance of social indicators in general, poorer countries lose less, in absolute and relative terms, than richer countries. It is argued that the explanation may lie in the extent to which richer countries have better social (and economic) indicators because of more public goods, and adaptation of economic and social mechanisms to the greater abundance of public goods such as physical infrastructure. Civil war destroys public goods, and therefore damages disproportionately the countries most dependent on them. A further implication of this framework is that the post‐conflict rebound in social indicators should be relatively stronger in poorer countries. The data bear out this prediction. Our results should not of course be read as implying that poorer countries need less support to avoid civil war and to cope with its aftermath. Although their losses are less, they start from a lower base; so even small declines severely impact human well‐being. Properly understood, our results highlight the central role that public goods play in underpinning the social (and economic) wealth of nations.     

The demand for food and beverages in Norway

The demand for food and beverages is estimated within a three-stage demand model. The separability structure of the model is checked by nonparametric tests. Some generalized axiom of revealed preference (GARP) violations are detected in one of the subsystems. However, they are removed by small adjustments in the quantities of fish, and the violations are interpreted as results of measurement errors. The almost ideal demand system is used in the static and a dynamic version. The results of various specification and misspccification tests suggest that the static version performs poorly as compared with the dynamic version. Norwegian demand elasticities for disaggregate food commodities have rarely been estimated within a system framework, so the results are of intrinsic interest. The elasticities estimated by using the dynamic model are of the expected signs and reasonable magnitudes. The values are stable over time for most commodities. Elasticities estimated within a subsystem are conditional on the goods included in that system, and they may differ from the more policy relevant unconditional elasticities estimated within a system including all goods. Adjustment formulas are used to approximate the unconditional elasticities from the estimated conditional elasticities. There are considerable differences between the numerical values of the conditional and unconditional elasticities for several of the foods. The unconditional own-price elasticities are in the interval-0.20 to-0.89. The own-price elasticities for hot drinks and for milk are most inelastic. The unconditional expenditure elasticities for food-away-from-home, fish, soft drinks, and alcoholic beverages are above one, while the expenditure elasticity for hot drinks is about zero.