Energy consumption of urban households in China

We estimate China urban household energy demand as part of a complete system of consumption demand so that it can be used in economy-wide models. This allows us to derive cross-price elasticities unlike studies which focus on one type of energy. We implement a two-stage approach and explicitly account for electricity, domestic fuels and transportation demand in the first stage and gasoline, coal, LPG and gas demand in the second stage. We find income inelastic demand for electricity and home energy, but the elasticity is higher than estimates in the rich countries. Demand for total transportation is income elastic. The price elasticity for electricity is estimated to be −0.5 and in the range of other estimates for China, and similar to long-run elasticities estimated for the U.S.     

非基本公共服务业发展的宏观经济效应分析——以北京健康医疗与教育培训行业为例

非基本公共服务业是面向国内需求、以提升居民生活质量和职业发展能力为目的、主要由消费者自行购买的服务业。研究发现,发展非基本公共服务业有助于实现内需升级、增加就业吸纳和经济转型。目前北京发展非基本公共服务业适逢其时,但户籍制度、投融资体制、社会心理和技术标准等是其阻碍因素。因此,应该从制度层面取消户籍制度内涵的垄断性福利、消除商业银行对民营资本的歧视性惜贷、改变目前的二元就业体制以及建立非基本公共服务行业中介组织和技术服务标准,推进非基本公共服务业大力发展。     

Determinants of Demand for Delivery Services in Sudan: An Empirical Investigation with Reference to Khartoum State, 2004*

Abstract: Using multinomial logistic methods, we examined the determinants of the delivery care seeking behavior of women in Khartoum State of Sudan, as well as the impact of changes in the attributes of public delivery services on the market shares of delivery services. Time distance and transportation cost have significant negative effects, while the random ‘quality’ coefficient is positive but not significantly different from zero. Further, the likelihood of choosing home over public delivery services increases with order of birth. The positive effects of women's education and household income are most important for those who prefer private over home delivery whereas the use of modern antenatal services is decisive in choosing modern over home delivery. Also, shifts in demand toward public delivery services resulting from improvements in quality and qualifications of medical staff might be undermined by the reduction in demand emanating from a rise in the order of delivery, time distance and transportation cost to public delivery institutions. The income effects are more pronounced, particularly for the share of private delivery services. Educated women tend to shift from home to modern delivery services.     

Some aspects of employment in Indian agriculture

The purpose of this study is to examine the effects of structural differences (due to size of holding) on employment in Indian agriculture. Translog cost function is applied, and restrictions are tested using a likelihood ratio test. For small- and medium-size farms, joint estimation of a non-homothetic cost function with cost share equations is conducted, and Allen elasticities of substitution and price elasticities of demand for eight different inputs are derived. Inputs are classified as substitutes and complements using Slutsky-Hicks-Allen-Schultz definition. Each source of labor against hired labor is a substitute for small farms (0–5 hectares). Some policy analysis of rural employment and a fertilizer subsidy scheme is presented using price elasticities of demand for small and medium farms.     

Elasticity of Energy Demand and Challenges for China＇s Energy Industry

I. Introduction Since late 2002, China’s energy demand and resources have become one of the most prominent issues in international discussions of energy. In our earlier studies of China’s energy demand as relates to transportation and urbanization (Gates and Yin, 2002; Yin and Gates, 2002), we took more of a long-term view and raised the possibility that even if China’s economy continued to grow rather slowly, which was the prevailing perception at the time, there would still be strong d…     

Regional Comparisons,Spatial Aggregation,and Asymmetry of Price Pass-Through in U.S. Gasoline Markets

Spot to retail price pass-through behavior of the U.S. gasoline market was investigated at the national and regional levels, using weekly wholesale and retail motor gasoline prices from January 2000 to the present. Asymmetric pass-through was found across all regions, with faster pass-through when prices are rising. Pass-through patterns, in terms of speed and time for completion, were found to vary from region to region. Spatial aggregation was investigated at the national level and the East Coast with the aggregated cumulative pass-through being greater than the volume-weighted regional pass-through when spot prices increase. These results are useful to the petroleum industry, consumers, and policy makers by providing a basis to estimate the retail price effects that result from a change in spot price.     

Joint product signals of quality

Summary The relationship between product quality, signals, and the firm's optimal pricing policy has been given much attention in economics. The literature is extended in this paper by considering the signaling problem of a firm that jointly produces two commodities—one of known quality to consumers (a search good) and one of unknown quality (an experience good). The model presented employs a stylized reputation function, a linear cost structure, and linear demand schedules to produce two interesting insights. First, the search good's price can potentially be used as a signal of the quality of the experience good. Second, the price of a search good will depend upon whether it is jointly produced with another search good or an experience good or whether it is produced in isolation by a single product firm. Furthermore, evidence from a paper on gasoline pricing seems to support this contention.     

Income and Price Elasticities of China＇s Exports

The appearance of new product varieties and improvements in the quality of goods have both played key roles in the rapid growth of China's exports. However, these two important elements have not been formally integrated into the demand equations for China's exports. As we demonstrate in this paper, income elasticity will be underestimated if new varieties of goods and quality improvements are omitted in price index and quantity index calculations, which are necessary for estimating the export demand function. Moreover, the faster new product varieties enter export markets, the greater the underestimation will be. In this paper, we develop an export demand equation that takes into account new product varieties and improvements in quality, and then calculate the demand function for China's exports using the data from 1992 to 2006. According to our estimation, the short‐term income elasticity of demand for China's exports is approximately 2.34, and the short‐term price elasticity is approximately –0.65. Our estimation predicts an increase in China's export value in the case of an RMB appreciation or export rebate rates reduction in the short term, due to the low price elasticity of China's exports, whose absolute value is less than 1. Our findings are novel and could have significant policy implications.     

Food Demand Characteristics in Uganda: Estimation and Policy Relevance

Uganda was highly successful in reducing poverty over the past two decades but made little progress towards household food security. This underlines the need for designing food security interventions customised for household‐specific needs and behaviours. This study estimates Ugandan household demand behaviour with a focus on food consumption paying particular attention to household‐specific characteristics. The results show that preferences to increase calorie‐dense staple consumption, likely associated with food energy deficiency, extend far beyond the percentage of rural Ugandans officially deemed poor. Price elasticities indicate that poor rural households are largely well positioned to compensate staple price increases by substitution as long as they are not already concentrated on the cheapest foods. This flexibility applies less to urban households. The estimated demand elasticities generally vary widely between rural and urban households and depend on expenditure levels. Household‐specific characteristics have significant, sometimes pronounced, influences on demand, as do seasons and regions. The results reflect highly differentiated demand behaviour, which can be utilised to improve the design and evaluation of food security interventions.     

Variety,Globalization, and Social Efficiency

The standard formal presentation of the Dixit‐Stiglitz‐Krugman (DSK) model of monopolistic competition with a constant‐elasticity‐of‐substitution (CES) utility function supposes a sufficient number of firms so that the elasticity of demand facing each variety is approximated by a constant elasticity of substitution. Such a formulation forces economies of scale to be frozen so that firm size never changes. We use a Bertrand‐Nash interpretation of the equilibrium that allows the elasticity of demand facing each variety to depend on the number of varieties, thus allowing the gains from globalization to reflect both the increase in variety and the exploitation of economies of scale. We also develop a precise expression for per capita real income with any number of sectors and examine the age‐old question of the socially optimal number of varieties.     

Limits to Growth in Organic Sales

The price gap between organic and conventional food might explain the low market share of organics in the Netherlands. A real-life experiment was carried out in 2006 in order to determine the price sensitivity of consumer demand for organics. Consumer prices of selected organic products were reduced by up to 40% below current market levels. The price elasticity of demand was low, because not all consumers perceived the price reductions. Moreover, the offer of organic varieties is limited, as is the consumer’s willingness to pay for the social attributes of organics.     

A Dual-Price Demand Theory for Economies under Transition

China adopted a dual-price system shortly after the economic reform started in 1978 to liberalise its price control. This led to the coexistence of both plan and market prices for an identical good in the economy. The conventional demand theory developed based on the pure market economies is not useful in explaining consumers' behaviour in the transitional economies such as China in which both plan and market prices are prevalent. This study develops an alternative demand theory for a dual-price (or dual-track) economy and derives the dual-price Slusky equation that identifies a replacement effect of price liberalisation. This demand theory distinguishes itself from the conventional demand theory and explains the ways in which consumers respond to the price liberalisation during the reform period. The new demand theory shows that the gradual approach to reform is superior to the ‘Big Bang’ approach in terms of reducing the ‘corrected inflation’ during the transition period. The new theory also suggests that the price elasticity of demand is higher in the dual-track system than that in a full market economy, implying that the price elasticity diminishes over the process of price liberalisation. This theory is tested using the Chinese aggregate consumption data.     

基于用户需求弹性的峰谷分时电价决策模型

针对现有的蜂谷分时电价设计文献侧重干考虑用户消费心理对电价均衡影响这一现象,构建了考虑用户需求弹性的峰谷分时电价决策模型,并结合四川某市的电网负荷运行数据进行了算例分析．说明了峰谷分时电价的具体实现思路与过程。结果显示,基于用户需求弹性的峰谷分时电价模型．可以较有效的引导用户需求,缓解电力供求矛盾。维持电力负荷平稳。     

上海居民住房需求的收入弹性分析———基于家庭层面的微观分析

内容对居民住房需求行为的分析,尤其对住房需求收入弹性的估计,是我们分析住房市场现状及判断发展趋势的重要依据,也是住房政策制定的基础前提.但目前国内相关文献有限,以微观数据为基础的研究更少.本文以国家统计局统计调查队2007年对上海居民家庭的大样本抽样调查问卷为数据基础,运用两阶段模型来估计上海居民住房需求的收入弹性.两阶段模型,即指先通过对租买选择、住户持久收入的分析,再将由此得出的IMR比率(由住户的租买概率计算而得)引入住房需求模型,从而得出参数的估计值.我们发现,在住房市场中,对住房消费的主力人群———30-59岁的各个年龄组中,IMR均显著,说明上海居民租买选择与住房需求量是联合决策.在市场化住房市场中,我们估计的住房需求收入弹性,30-44岁年龄组为0.419,45-59岁年龄组为0.559,收入弹性随年龄上升而增大.同时本文也分析了市场化与非市场化住房市场需求弹性的差异,及租买选择如何随年龄而变化     

Substitutions among energy imputs in U.S. manufacturing

Summary and Conclusion With cross-section data on the purchases of four energy inputs by 11 U.S. manufacturing industries, Allen partial cross elasticities of input substitution and own price elasticities of demand were computed. The sample set represents 85 percent of total manufacturing energy demand in 1962. The substitution elasticities between fuel oil and natural gas, fuel oil and purchased electricity, and between natural gas and electricity, were statistically significant for about half of the 11 two-digit SIC industries studied. These elasticities ranged between 12.9 and 1.7 with half of them less than 4.0.Importantly, the elasticity of substitution between coal and the above three energy inputs was significantly different from zero in only three manufacturing industries (comprising some 35 percent of total manufacturing energy demand). Thus it would appear that only three U.S. manufacturing sectors will contribute towards the substitution of domestic for international energy sources. Indirect substitution between energy sources, with the consequent implications for the balance of payments, will primarily have to come from the substitution of electricity (from coal-fired plants) for natural gas (from Canada) and fuel oil (indirectly from the Middle East, Africa, and Latin America).Similar substitution results were found when all 11 industries were aggregated together or divided into large and small energy demand groups. As well, there appear to be no significant differences in overall substitution response between the two categories of large and small energy users. Supporting the substitution results, we found that the own price elasticity of demand for coal to be about –.5 and not different from zero while the price elasticities for natural gas, fuel oil, and purchased electricity were between –.7 and –2.67 (and statistically different from zero).As a general conclsuion, the substitution of domestic coal for other energy inputs will primarily have to come indirectly through greater use of coal to produce electricity which is purchased by the manufacturing sector. The scope for direct substitution of coal for other energy inputs in U.S. manufacturing is limited to only three sectors and cannot be expected to have an exceptionally large impact on mitigating the inflation and blanace of payments implications of the recent increases in the price of imported energy inputs.This work was undertaken at the Bureau of Economic Analysis. Discussions with George Green, A. Ray Grimes, Jr., Michael Mohr, John R. Moroney, Gorti Narasimham, and Benjamin Wolkowitz are acknowledged. These individuals, as well as the B.E.A. and the author's present employer, remain independent from the views expressed in this study.     

Public capital and small firm performance

Previous research on the role of public capital (infrastructure) in private production has emphasized potential complementarities between public and private capital at an aggregate level. Presumably such effects, if they exist, arise from benefits enjoyed by individual units of production. Because of the potential for them to be location-specific or capital constrained, it is conceivable that small businesses may benefit disproportionately from public capital. Tests using financial data for 871 small firms from 1992–96 indicate a positive and statistically significant elasticity between private labor productivity and the level of public capital in the area where the firms are located. Such a positive elasticity provides further evidence that public and private capital are complementary inputs into production and has important policy implications.This research has been supported through a grant from the Kauffman Center for Entrepreneurial Leadership, the support for which the authors gratefully acknowledge.     

Firm and industry elasticities of substitution: The two factor case

Summary For the industry composed of single output, two factor firms, industry elasticity of demand for one of the factors with respect to the price of the other is negative or positive as the elasticity of demand for industry output is greater or less thanindustry elasticity of substitution between the factors. Using isoclines, vectors, isoquants, and isoscales, it is shown that, where firm isoquants are non-homothetic, industry elasticity of substitution for constantindustry output allows for adjustment of the level of firm output, and thus exceeds firm elasticity of substitution for constantfirm output.He wishes to thank two anonymous referees for helpful suggestions.     

Advance notice of real-time electricity prices

Many utilities are offering real-time pricing (RTP) to their large industrial customers. Under RTP, hourly rates change with real-time supply and demand. As compared to fixed rates, RTP shifts price risk from the utility to the customer. With such a change, it is natural to ask if there is an optimal level of advance notice of prices. This paper contains a simulation of real-time rates for industrial customers with and without advance notice of prices. Advance notice is valuable to customers who can increase elasticity of substitution. This value must be weighed against the cost to the electric utility from an increase in demand forecast error. The simulation suggests that day-ahead advance notice increases welfare for reasonable magnitudes of customer elasticity and utility forecast error.This material was prepared with the support of the U.S. Department of Energy, Grant No. DE-FG48-95R810582 A000. However, any opinions, findings, conclusions, or recommendations expressed herein are those of the authors and do not necessarily reflect the views of the U.S. Department of Energy. This work was also supported in part by funds provided by the University of North Carolina, a Barclays American Research Award, and the Belk College of Business Administration. The authors are grateful for comments provided by Steve Braithwait, Laurence Kirsch, Steve Johnston, Peter Griffes, John Trapani, Mike O'Sheasy, and participants of Research Triangle Institute, Western Economic Association, and Rutgers University Center for Research in Regulated Industries Advanced Workshop in Regulation and Public Utility Economics.     

Doomed to Deficits? Aggregate U.S. Trade Flows Re-Examined

This paper examines the stability of import and export demand functions for the United States over the 1975q1–2001q2 period. Using the Johansen maximum likelihood approach, an export demand function is readily identified. In contrast, there appears to be a structural break in the import demand function in 1995; specifications incorporating this break pass tests for cointegration, although the price elasticity is not statistically significant. Only when excluding computers and parts from the import series is a stable import demand function detected. The resulting point estimates confirm the persistence of the income asymmetry first noted by Houthakker and Magee, although in a slightly diminished form. One policy implication of these findings is that dollar depreciation—unaccompanied by a realignment of growth trends—is insufficient to substantially reduce the U.S. trade deficit. JEL no. F31, F41     

The residential demand for electricity in Japan: An examination using empirical panel analysis techniques

This paper examines the residential demand for electricity in Japan, excluding Okinawa-prefecture, from 1975 to 2005 as a function of the disposable income per household and the overall unit price of electricity for general consumers, by using the empirical panel analysis techniques of a panel unit root test, a panel cointegration test, and group-mean dynamic ordinary least squares (DOLS) estimators to determine whether or not each variable is stationary. This study's contribution is twofold. First, for a more accurate empirical economic analysis, it divides Japan into a number of regions so that the estimation of coefficients becomes more powerful due to the increased degree of freedom from the utilization of the panel data. Second, the study chose Japan for this analysis on the basis of discussions regarding the deregulation of the residential electric power supply that is scheduled for the near future. All variables—sales per household, price, and income per household—can be assumed to have a unit root and cointegration relationship. The results determine that the price effect is negative and elastic and that the income effect is inelastic. These results correspond to other such studies on developed countries that are significant economic powers.