Deriving a Flexible Mixed Demand System: The Normalized Quadratic Model

This article deals with the specification of a locally flexible and theory-consistent system of mixed demand functions, a framework that allows for a rich set of possibilities about what is assumed as exogenous in a demand model. A coherent mixed demand system is derived by using the restricted expenditure function typically studied in the related area of rationed demands. The method is implemented by a new normalized quadratic (NQ) parameterization of the restricted expenditure function. The resulting NQ mixed demand system is illustrated with an application to a nine-good model of the Italian demand for vegetables.     

A Structural Econometric Model of Joint Consumption of Goods and Recreational Time: An Application to Pick-Your-Own Fruit

This article develops a structural econometric consumer demand model for goods, which have time and monetary costs, and where time spent obtaining the goods also enters into the utility function. The model is used to analyze customers' decision to buy pick-your-own versus preharvested strawberries at North Carolina pick-your-own fruit operations. The analysis distinguishes the effect of time as a resource constraint and time that provides utility. Demand for strawberries sold at the operations is price elastic, and demand for pick-your-own strawberries is less price elastic than demand for preharvested strawberries.     

Nonlinear Dynamics and Structural Change in the U.S. Hog–Corn Cycle: A Time-Varying STAR Approach

The linearity of the U.S. hog–corn cycle has been questioned by Chavas and Holt (1991) . Even so, attempts have not been made to model the potential nonlinear dynamics in the hog–corn cycle by using regime-switching models. One popular alternative is Teräsvirta's smooth transition autoregressive (STAR) model, which assumes regime switching is endogenous and potentially smooth. In this article, we examine monthly data for the U.S. hog–corn cycle, 1910–2004. A member of the STAR family, the time-varying STAR, is fitted to the data and its properties examined. We find evidence of nonlinearity, regime-dependent behavior, and time-varying parameter change.     

Structural changes in Swedish wastepaper demand: a variable cost function approach

The primary purpose of this paper is to analyse the short-run price responsiveness of wastepaper demand in Sweden for four different paper and board products, as well as any structural changes in demand behaviour for these products over time. The analysis is done within a variable Translog cost function model, and we employ data for individual paper and board mills over the time period 1974-1994. The results suggest that the short-run own-price sensitivity of waste paper demand is relatively high compared to those of other input factors, and it has also tended to increase over time for some of the paper products. In addition, wastepaper demand has also become more sensitive to changes in energy prices, and its use increases with increases in the price of energy. However, the relationship between wastepaper and woodpulp is more complex, and in many instances wastepaper and woodpulp are short-run complements. Overall this implies that price based recycling policies will be relatively successful in promoting wastepaper use, but they will not necessarily lead to the conservation of virgin forest resources.     

Household size and residential water demand: an empirical approach*

The effectiveness of pricing policies depends on the price elasticity of consumption. It is well documented that residential demand for water is influenced by heterogeneity associated with differences in the size of the household and socioeconomic characteristics. In this paper, we focus on household size. Our initial hypothesis is that users’ sensitivity to changes in price is different depending on the number of household members. To this end, we carry out an empirical estimation of urban water demand in Zaragoza (Spain) distinguishing between households with different sizes using data at the individual level. As far as we are aware, this approach to urban residential water demand is new in the literature. The analysis suggests that all households are sensitive to prices regardless of size. A more relevant finding is that small households are more sensitive to price changes.     

Structural changes in the demand for food in Asia: empirical evidence from Taiwan

Many Asian countries are expected to undergo structural transformations in their economies and rapid urbanization over the next 25 years. The changes in tastes and lifestyles engendered by urban living are likely to have significant influences on food demand. Changes in marketing systems and occupational changes, closely linked with increasing GNP per capita, also may influence the demand for food. In this paper, estimates presented for Taiwan demonstrate that structural changes in food demand (as distinguished from changes due to income and price effects) have been significant factors driving the rapid changes in dietary patterns seen in East Asia over the past three decades. Because most previous demand studies have ignored the possible influence of structural shifts which are highly correlated with increases in per capita income over time, the effects of income on food demand have been overestimated.     

Adaptation and Climate Change Impacts: A Structural Ricardian Analysis of Farm Types in Germany

Based on farm census data, we explore the climate‐dependent incidence of six farm types and the climate‐induced impacts on land rental prices in Germany. We apply a structural Ricardian approach by modeling the dominant farm type at 9,684 communities as depending on temperature, precipitation and other geographic variables. Rents per farm type are then modeled as depending on climate and other conditioning variables. These results allow the projection of the consequences of climate change as changes in our climate variables. Our results indicate that permanent‐crop farms are more likely to dominate in higher temperatures, whereas forage or mixed farms dominate in areas of higher precipitation levels. Land rental prices display a concave response to increases in annual precipitation, and appear to increase linearly with rising annual temperature. Moderate‐warming simulation results for future decades benefit most farm types but seem to penalise forage farms. Rental prices are projected to increase, ceteris paribus, for all farm types.     

Growing struggle over rising demand: How land use change and complex farmer-grazier conflicts impact grazing management in the Western Highlands of Cameroon

Continuous population growth and rapid urbanization rates in West and Central Africa are associated with rising demand for fresh vegetables and animal-based products, providing market opportunities for local producers from the surrounding areas. However, in regions such as northwestern Cameroon where pastoral cattle breeding remains an important part of the local livestock sector, competition over dwindling resources with local crop farmers are increasing due to progressive land-use change from natural and traditional grazing areas into agricultural land.In order to determine the main areas of conflict and their interdependencies, we used a multi-temporal land-use classification and a multi-dimensional participatory approach of collecting spatial data from six representative Mbororo cattle herds, equipped with GPS collars. We combined this with 162 map-based interviews with randomly sampled pastoralists on seasonal grazing areas, grazing management, land ownership, and major constraints to herding. This data set was complemented by the perspectives of 40 randomly sampled crop farmers from four major transhumance zones.Both parties identified farmer-grazier conflicts as a serious constraint for their activities in the rainy season (graziers: 23.9 %; farmers: 22.5 %) and particularly in the dry season (36.3 %; 47.2 %). Land tenure issues will be of critical importance in the future as only very few respondents held an official land title, and pastoralists appeared less prepared for land disputes than crop farmers, who more often claimed land ownership through fencing. Therefore, there is an urgent need for developing and implementing alliance farming strategies that are based on dialogue between both interest groups to avoid further escalation within a region already in a conflict-ridden political environment.     

Urban water demand with fixed volumetric charging in a large municipality: the case of Brisbane,Australia*

This paper uses suburb‐level quarterly data to model residential water demand in Brisbane, Australia, from 1998 to 2003. In this system, residential consumption is charged using a fixed annual service fee with no water entitlement followed by a fixed volumetric charge per kilolitre. Water demand is specified as average quarterly household water consumption and the demand characteristics include the marginal price of water, household income and size, and the number of rainy and warm days. The findings not only confirm residential water as price and income inelastic, but also that the price and income elasticity of demand in owner‐occupied households is higher than in rented households. The results also show that weather, particularly summer months and the number of rainy days, exerts a strong influence on residential water consumption.     

The income elasticity of meat: a meta‐analysis

The demand for meat has been estimated by many studies utilizing various data and estimation methods. In this study, we perform a meta‐analysis of the income elasticity of meat that involves regressing 3357 estimated income elasticities, collected from 393 studies, on variables that control for study characteristics. Across several meta‐regression specifications, we find significant differences in income elasticities tied to the type of meat being studied, as well as a few functional forms, data aggregations, publication characteristics, and locations of demand. However, many study characteristics do not significantly influence reported income elasticities. Less concern should be given to such characteristics when choosing an income elasticity from the literature.     

Economic development,food demand and the consequences for agricultural resource requirements: an application to Indonesia

We analyse food demand patterns of Indonesian households from a resource intensity perspective and quantify the impact of changed demand patterns on the use of three major resource inputs: fossil fuel; land; and water in agricultural production. Using Indonesian Family Life Survey data, 13 major food items (which constitute 70 per cent of food expenditure) are categorised into low, moderate and high resource intensity, and income elasticity and Engel curves are estimated for the period from 1997 to 2007. Our results show that income growth in Indonesia is associated with demand patterns that are more resource intensive. By 2007, per capita requirements of fossil fuel, land and water increased by 42.7 per cent (3.13 MJ), 44.9 per cent (1.24 m²) and 50.4 per cent (2.1 kL), respectively, relative to 1997. The results imply that, at least for Indonesia, changed food demand patterns resulting from economic development will increase the demand for natural resources substantially.     

结构方程模型森林康养消费需求因素分析

以计划行为理论为基础进行设计问卷,结合实地调研与在线问卷调查数据,运用结构方程模型研究现阶段中国居民森林康养消费需求的影响机制。结果表明:中国森林康养产业普及程度较浅,深度的森林康养内容认知与发展进展很浅薄;森林康养消费需求会促使居民的消费行为,而态度、知觉控制会显著正向影响居民的消费需求,态度、规范与知觉控制之间影响显著。因此,应设计多层次森林康养产品,鼓励森林康养养老,助力脱贫攻坚;提升居民参与森林康养的客观能力,奠定消费战略的基础;研究康养理论,推行康养理念,设计康养服务产品;政企协力推进,构建政-企-森-居-社会协调发展新模式,以便促进森林康养良好发展。     

International market integration and demand: An analysis of the Norwegian and Danish herring market

This article provides a method where pre-tests for international market integration are used to identify market structures before estimating demand systems. The method is applied to the analysis of the European herring market. A Vector Auto Regressive model in Error Correction form is used to identify co-integration vectors between price series and, based on this, to test for the Law of One Price. The Law of One Price is in force between the landing markets for herring in the two largest global supplier countries, Norway and Denmark. Therefore, an inverse demand function is estimated for the combined Norwegian and Danish market. The results are used in the interpretation of the significant increase in the prices of herring on the Danish ex-vessel market in 2001, given the stability of the Danish market. The implication is that even though Denmark did not export to the main Norwegian export markets in the former Soviet Union and Eastern Europe, the Danish landing price is influenced by the situation there.     

土地利用变化动态模型的比较分析与评价

土地利用变化动态模型，已成为区域土地利用研究过程中重要的系统性方法。基于不同研究途径、研究目的和不同分析角度的动态模型具有不同的建模机理和解释功能，动态的、基于过程的模型比经验的、随机的和静态的模型更适合于预测土地利用变化的趋势。建立在不同空间分析基础之上的动态模型在表现形式和分析能力上有其不同的优缺点。本文通过对其优缺点的分析评价，提出了建模的新思路，为土地利用动态变化的研究方法作出新的尝试与探索。     

Trade diversion and antidumping effectiveness: insights from a residual demand model

A residual demand model is developed to predict the likely effects of an antidumping duty in the presence of trade diversion. A key insight is that the ability of an AD duty to increase the welfare of producers in the country imposing the duty hinges on the import supply elasticity for product from non‐named sources. The only instance in which this is not true is when supply for product from the named source is perfectly elastic. In this case, the welfare gain to domestic producers is maximised irrespective of the supply elasticity for imports from non‐named sources. A comparison of the residual demand model with the Armington model suggests the latter significantly understates both trade diversion and domestic producer gains from the duty.     

Farm-level adaptation to climate change in Western Bangladesh: An analysis of adaptation dynamics,profitability and risks

Using long-term district-level climate data and a case study from a drought-prone village in western Bangladesh, this research explored trends in climate change, and analysed farmers’ adaptation dynamics, profitability and risks. This is the first study of its kind for drought-prone areas in Bangladesh.Farmers perceived climate changes included increases in temperature and decreases in rainfall which were as consistent with the trends of Chuadanga climate records. Farmers’ adaptation measures included changes in cropping systems, cropping calendars, crop varieties, agronomic practices, crop diversification and improved animal husbandry. Reducing environmental stress, ensuring self-sufficiency in staple crops (mainly rice) and other crop production practices, and enhancing economic viability of farm enterprises have underpinned these adaptations. Off-farm and non-farm wage employment, temporary migration, self-employment and educating children, constituted the core non-farm adaptation strategies.Emerging cropping systems like maize/cucumber and maize/stem amaranth/rice were economically more viable than the traditional rice/rice and rice/maize systems. Despite some uncertainties, farming was preferred to off-farm work, generating higher returns to labour for all cropping systems. Limited access to stress-tolerant varieties, extension services and affordable agricultural credit, combined with high production costs, variability in crop yields and output prices, are the main barriers to adaptation. Stronger agricultural research and support services, affordable credit, community-focussed farming education and training are critically important for effective adaptation to climate change.