A cost of living index incorporating a network effect

This paper constructs a cost of living index (COLI) that incorporates a network effect. While in this instance the application is to the telecommunications sector, the COLI are applicable more generally to network industries. The COLI permit valid welfare comparisons to be made by individual, region and country. Illustrative COLI estimates are provided for selected OECD member country telecommunications market data.     

Estimating the true cost of living for households with different incomes using data from Taiwan

This empirical study investigates why the true costs of living for different income groups in Taiwan as measured by the superlative Törnqvist price index have grown dissimilarly over the sample period. Specifically, it shows that using the aggregate Cost of Living (COL) estimates for the entire households as is commonly practiced would produce noticeable group bias effect in measurement. Also the magnitude of the commodity substitution bias in the conventional Consumer Price Index (CPI) is found to be positively related to household income in general. Because of the presence of these two biases, the true COL for households belonging to the two ends of the income spectrum is found to be over-estimated. This article is therefore in full agreement with Arrow's proposition that an alternative and separate set of price index be constructed.     

Using food prices and consumption to examine Chinese cost of living

This paper considers two approaches to examining potential bias in China's consumer price index: (i) inferring true changes in cost of living from consumer behaviour; and (ii) creating alternative price indices to compare with official indices. For (i), our semi‐parametric estimates agree with the recent finding of a large understatement in increases to the true cost of living. For (ii), we focus on food prices and explore potential causes of bias. We find some evidence of a new‐good bias. China's large‐scale migration also causes changes in the cost of living that are not reflected in the consumer price index.     

消费者价格指数能反映生活成本吗 基于城镇各收入阶层食品生活成本估计

本文基于超级指数和可变偏好效用函数方法构建了1997-2011年中国城镇各收入阶层家庭食品消费生活成本指数,并在此基础上将各阶层生活成本指数与其消费者价格指数进行对比,检验消费者价格指数对生活成本的反映能力。样本期间内消费者价格指数与生活成本指数比较接近,可以较好地反映生活成本的变化。基于超级指数方法的结果显示,样本期间内替代偏差与家庭收入负相关,与通货膨胀正相关,而由于偏好改变所造成的偏差在绝对值水平上则与收入水平正相关。     

Chained,exact and superlative hedonic price changes: estimates from microdata

Scanner data are used to calculate chained, exact (and superlative) hedonic price indexes for television sets. The data source is available for a wide range of goods, the application providing an example of how this method can be more widely applied. The indexes correspond to constant utility, hedonic cost-of-living indexes. The approach improves on the existing direct method, which takes its estimates directly from the coefficients on time dummies in a hedonic regression. It also improves on the matched model method used by statistical agencies. The differences between actual price changes and exact hedonic quality-adjusted price changes are found to be substantial. Base-period and current-period weighted exact hedonic indexes are similar, thus providing good approximations to a superlative index. Estimates from the direct, dummy variable approach were compared to the superlative indexes. The disparities between the results argue for caution in the use of the direct, dummy variable approach to estimating quality-adjusted price changes.     

Exact nonradial input, output, and productivity measurement

Summary. The use of measures originally suggested by Bennet, Bowley, and Hicks in the context of cost of living, welfare, and consumer surplus measurement to measure inputs, outputs, and productivity is examined. Suitably normalized versions of the Bennet-Bowley measures are shown to be exact and superlative measures of input, output, and productivity indicators. Received: April 2, 2001; revised version: August 8, 2001     

The social cost of living index

Household cost of living indexes reflect household preferences; analogous indexes for groups of households require a corresponding concept of group preferences. In this paper I investigate the ‘social cost of living index’, a group index based on the Bergson-Samuelson social welfare function. I first define the index and examine its properties under the assumption that the investigator constructing it expresses his distributional judgments in an explicit Bergson- Samuelson social welfare function; I then examine the ‘maximizing society’ and the ‘independent society’, two cases in which the index can be constructed from the information contained in the market demand functions. In these two cases a Laspeyres index (i.e. the fixed weight index based on the reference consumption pattern) is an upper bound on the exact social cost of living index. In general, however, the assumptions required to place bounds on the social cost of living index are much more likely to be satisfied than those required to place analogous bounds on a household's cost of living index.     

SWITCHING COST AND DEPOSIT DEMAND IN CHINA

This article develops and estimates a dynamic model of consumer demand for deposits in which banks provide differentiated products and product characteristics that evolve over time. The switching cost is 0.8% of the deposit's value, which leads the static model to bias the demand estimates. The dynamic model shows that the price elasticity over a long time horizon is larger than the same elasticity over a short time horizon. Counterfactual experiments with a dynamic monopoly show that reducing the switching cost has a comparable competitive effect on bank pricing as a result of reducing the dominant position of the monopoly.     

MEASURING THE COST OF LIVING INDEX,OUTPUT GROWTH,AND PRODUCTIVITY GROWTH IN THE RETAIL INDUSTRY: AN APPLICATION TO JAPAN

This study applies a framework that enables one to estimate quality, exact cost of living (COL) indexes, and output growth for the retail industry. The framework is based on discrete choice theory, in which product differentiation and quality change are explicitly modeled. For illustration, the framework is then applied to the Japanese retail industry. The estimated quality index shows that, between 1985 and 1999, Japanese retail services quality improved, and the estimated COL index declined monotonically. Furthermore, the results from growth accounting suggest that ignoring both differentiation in the retail services market and changes in service quality may downwardly bias estimated output and productivity growth.     

Using Scanner Data to Estimate Country Price Parities: A Hedonic Regression Approach

This paper uses scanner data from the bar-code readers of retailers to provide estimates of inter-country price parities at the level of the basic heading. The use of such data is appealing given its extensive coverage of transactions, information on weights, prices and characteristics of items at a highly detailed level. The study uses dummy variable hedonic and exact/superlative hedonic index number formulations applied to an inter-country context for both bilateral and multilateral comparisons. Unlike conventional methods, such methods are not confined to matched samples comparisons and thus make use of the entire sample. Their application extends to price survey data using checklists on characteristics. The application is to scanner data on about 1 million transactions for television sets over two months in three countries. It is, to the authors' knowledge, the first such use of scanner data and application of the above hedonic frameworks in this context.     

Input cost, capacity utilization and substitution in the short run

This article studies the behavior of input cost shares in an environment where labor is costly to adjust, materials can be adjusted at no cost and capital is fixed. A model relating cost shares with relative prices and adjustment costs is proposed, allowing joint estimation of the elasticity of substitution and the adjustment cost function, which is an unknown function of the capacity utilization. Based on a panel of more than 700 manufacturing firms, we find evidence of strong input share variations according to the degree of capacity utilization. The estimated shapes of adjustment costs curves of labor are in agreement with our theoretical model, and we obtain sensible elasticities of substitution estimates. Based on such estimates, we find evidence of a negative (positive) bias in downturns (recoveries) in conventional productivity growth measures.     

CALCULATING A PRICE INDEX FOR FAMILIES WITH CHILDREN: IMPLICATIONS FOR MEASURING TRENDS IN CHILD POVERTY RATES

This paper investigates the effects of varying consumption patterns for families with and without children on measured trends in child poverty. We first use data from consumer expenditure surveys to calculate price indices by family type. We next examine the effect of using these group-specific price indices on measured trends in child poverty. Although we find that, all else equal, children increase the cost of living, our calculations indicate that on average families with children experienced relatively lower inflation rates than families without children during the 1968 to 1987 period. While this result suggests that estimates of child poverty rates calculated using an average price index may have over-stated secular increases in child poverty, we find that child poverty rates calculated using a price index specific lo families with children are not substantively different from those calculated using an average index for all families.     

Using Engel curves to estimate bias in the Canadian CPI as a cost of living index

Abstract.  Semiparametric Engel curves are used to infer bias in the Canadian CPI as a Cost of Living Index. The budget share of food has long been used as an indicator of welfare. We compare households with the same levels of CPI deflated total expenditure over the period 1978–2000. Differences in the expenditure share of food are attributed to the CPI failing to capture changes in costs of living. We employ a novel econometric approach using a single index penalized linear spline model. Over the period, we find that the CPI overstated changes in the cost of living between 1.33 and 1.86% for the four household types considered. JEL classification: D1, C1     

Measurement of Changes in Economic Welfare in India: 1970–2001

This paper provides time series estimates of measures of economic welfare, inequality, decile class specific true cost of living index and poverty measures based on 20 rounds of National Sample Survey data for the period 1970–2001. It has estimated piece-wise Linear Expenditure System (LES) for very poor, moderately poor, non-poor low and non-poor high expenditure groups for rural as well as urban areas. Money metric utility for deciles are derived from the money metric utility function and social welfare index is constructed by aggregating metric utility of the deciles. Using social welfare index as well as real per capita consumption, the paper analyses the changes in economic welfare over the three decades. Using conventional measures, the paper analyses the changes in poverty and inequality during 1970–2001. The paper also provides estimates of the welfare effects of commodity prices.

     

Budget Standards and the Poverty Line

This article reports some of the results from a recent study which, among other things, developed and costed low cost budgets for a range of Australian households. A budget standard represents what is needed, in terms of goods, services and activities, to achieve a particular standard of living and what that costs in a particular place and time. A low cost budget standard is one designed to meet basic needs at a frugal level while still allowing social and economic participation consistent with community expectations. The low cost budget standard estimates for households living in Sydney in February 1997 are somewhat higher than the Henderson poverty line, partly a reflection of the high cost of housing in Sydney, but also a consequence of the low cost standard itself being above a poverty standard. In spite of this, the budget standard relativities for different households provide an estimate of the relative needs of Australian households in the 1990s which could replace the current much-criticised equivalence scale.     

AN EVALUATION OF THE USE OF HEDONIC REGRESSIONS FOR BASIC COMPONENTS OF CONSUMER PRICE INDICES

The importance of adjusting for quality changes in the measurement of consumer prices, and the role hedonic regressions can play in achieving this, is well recognised. However, the use of such regressions can take different forms, including (i) adjustments by statistical offices for non-comparable substitutions via the matched models method , (ii) direct estimates from the coefficients on dummy variables for time, and (iii) exact hedonic and superlative indices corresponding to a constant utility formulation from an economic theoretic approach. The literature on these approaches generally deals with each in isolation; the purpose of this paper is to outline and evaluate them in order to draw conclusions as to their practical suitability for the compilation of quality-adjusted consumer prices indexes. The case is argued for a move towards the last of these approaches, which developments in electronic data retrieval (scanner data) now make feasible. The paper concludes with the results of some empirical work comparing the results of the direct method with those from the exact, superlative, approach.     

Scanner Data and the Measurement of Inflation

This paper outlines the potential use of bar-code scanner data from retailers for the measurement of inflation. The source benefits from its extensive coverage in providing data on prices, quantities and values of transactions of each model of a good sold. Relative weights can thus be ascribed to price changes in both base and current months at a highly detailed level which allows us to estimate substitution bias. Methods of adjusting for quality changes can be considered. The dummy variable hedonic approach is compared with a superlative, exact hedonic approach and a matching technique akin to that used by statistical offices.     

Scenarios for a redistribution of unpaid work in the Netherlands

The consumer price index (CPI) is used in the United States to measure changes in the cost of living. Since the CPI is used to index the official U.S. poverty guidelines and to establish eligibility criteria for various public assistance programs, a change in the methodology used to calculate the CPI would impact the accuracy of poverty statistics and, more importantly, poor families' access to public assistance. Since the majority of these poor families are headed by women, the CPI becomes a critical issue for feminist economics. In December 1996 the United States Senate Finance Committee's Advisory Commission to Study the Consumer Price Index issued its final report which concluded that use of the consumer price index results in widespread substantial overindexing. This paper uses the basic needs budgets (BNB) to evaluate changes in the cost of living for low-income families. The author compares the cost of the BNBs for single-parent families in 1983 and 1996 and finds that the cost of the bundle of goods and services included in the BNBs has increased faster than the CPI. The author finds similar results for two-parent families.     

CPI的理论框架:固定篮子指数还是生活费用指数?

消费者价格指数(CPI)是使用最广泛的宏观经济指标之一.固定篮子指数和生活费用指数是编制CPI的两个理论框架,在国际上,使用哪一个理论框架来编制CPI是一个有争议的问题,美国、荷兰、瑞典等少数国家使用生活费用指数框架,而绝大部分国家使用固定篮子指数框架.本文介绍了CPI的两种理论框架之争,对两种理论框架进行了全面的比较,探讨了生活费用指数成为价格指数的条件,对生活费用指数的优点、缺点和新产品的处理等问题进行了分析,在此基础上得出结论.     

The Effects of New Goods and Substitution on the Korean CPI as a Measure of Cost of Living

This paper estimates upper-level substitution and new-goods bias in the Korean Consumer Price Index (CPI) from the early 1990s to the mid 2000s. It has been estimated that the upper-level substitution bias in the CPI alone increased the inflation rate by 0.51 percentage points per year over the 13-year period between 1990 and 2002. The new-goods bias further increased the inflation rate by 0.17 and 0.13 percentage points per year between 1990-1995 and 1995-2000 respectively. The Chained Laspeyres index series that is based on annually-updated weights has been found to correct less than half of the upper-level substitution bias.