Depletion: Bridging the Gap Between Theory and Practice

Adjusting national income for depletion is important in order to send correct signals to policy makers. This article reviews a number of depletion measures that have been recently brought forward in the context of environmental accounting (‘practice’) and green accounting (‘theory’): depletion as change in total wealth; depletion as ‘using up’ of the resource; depletion as net savings; or, depletion as net investment. The differences in assumptions between these measures are clarified by contrasting their approaches with the classic theory of a firm engaged in extraction. All measures are evaluated using a time series of data on Dutch natural gas reserves. Our main findings are that correcting for the cost of depletion would lead to significant adjustments of both level and growth rates of Dutch net national income, with a strong dependency on the chosen measure.We counter criticism that accounting in practice would necessarily underestimate depletion. The choice for a depletion measure should be determined by the context of use: measurement of social welfare or sustainable income. The physical measure put forward in the SEEA Central Framework can be justified by its consistency with the income concept that underlies the SNA.     

A General Approach to Welfare Measurement through National Income Accounting*

A framework is developed for analyzing national income accounting using a revealed welfare approach that is sufficiently general to cover, both the standard discounted utilitarian and maximin criteria as special cases. We show that the basic welfare properties of comprehensive national income accounting, previously ascribed only to the discounted utilitarian case, extend to this more general framework. In particular, under a wider range of circumstances, it holds that real NNP growth (or, equivalently, a positive value of net investments) indicates welfare improvement. We illustrate the applicability of our approach in the Dasgupta–Heal–Solow model of capital accumulation and resource depletion.     

Determinants of the adjusted net saving rate in developing economies

The adjusted net saving rate, initially known as the genuine saving rate, was first published by the World Bank in the late 1990s as a more comprehensive measure of national saving and one more indicative of sustainable development. The adjusted net saving rate incorporated not just physical capital depreciation, but natural capital depletion and environmental damage, as well as including some human capital formation. In this paper, using a cross‐section of developing economies for 2001–2006, determinants of the adjusted net saving rate are estimated. For comparison, the same determinants for the gross national saving rate are estimated. Also, a basic Solow growth model is extended to incorporate natural resources and to justify a more comprehensive measure of savings, such as the adjusted net saving rate, for modeling economic growth. The two measures of savings are then compared as determinants in estimations of economic growth. Understanding the determinants of the adjusted net saving rate is useful for policies to promote sustainable development.     

Accounting for India's forest wealth

In this paper, we account for forest wealth in India. Changes in the timber and carbon wealth embodied in these forests are related to important green national accounting aggregates such as genuine saving and the change in wealth per capita. Important accounting issues include the timing of carbon releases that occur when forests are disturbed, as well as the valuation of these releases. Our empirical findings suggest that while India's forest wealth is substantial, net changes in this wealth are arguably not so large at least in relation to GNP. However, when viewed in the context of the wealth-diluting effects of population growth this implies a far larger additional savings effort is required to cover the (net) loss in forest values than otherwise appears to be the case. Finally, we examine ways in which the accounting approach that we adopt can be reconciled with approaches which stress conserving forest wealth.     

CONCEPT AND DEFINITION OF INCOME IN THE NATIONAL ACCOUNTS

It is a truism that the national accounts have engendered their own concept of income which is different from other contexts such as business accounting, taxation or welfare analysis. Less known are the principles on which this income concept is based. This article is an attempt to specify such principles, investigating in particular the role of the transaction principle, and to derive an income concept therefrom. The crucial point of the argument is whether or not it is appropriate within the system of the national accounts to assign an income to sectors other than the households. The theory is applied to some practical questions which have been discussed in the process of the revision of the SNA.     

The cost of natural capital consumption: Accounting for a sustainable world economy

The System for integrated Environmental and Economic Accounting (SEEA) has been criticized in this journal for ignoring the benefits of ecosystem services for human well-being. This paper argues that extended national accounts should not attempt measuring economic welfare. Rather, they could and should assess the environmental sustainability of economic activity as the cost of natural capital consumption. The global application of SEEA concepts and methods demonstrates the feasibility of international green accounting. For the world economy, sustainability costs run to about 3 trillion US$ or 6% of world GDP. Large variations at national and regional levels suggest that conventional economic indicators may significantly overstate economic progress in some parts of the world. Data gaps and lack of data comparability affect these first estimates. National and international statistical services should be more aggressive in greening the national accounts. More prudent and more sustainable economic policies might be the result.     

The dangers of extended, but incomplete, accounting for measures of economic performance in a world of imperfect knowledge

The conventions currently employed by national statistical agencies for income and wealth accounting leave out many things relevant to economic performance and human well-being. This has lead to proposals for, and attempts at, more comprehensive accounting. Fully comprehensive accounting is impossible, and the question addressed in this paper is whether a fuller, but incomplete, accounting is guaranteed to be nearer to the truth than the conventional accounting. The answer to this question is ‘no’. In general, for example, we cannot be sure that ‘genuine saving’ would be more accurately measured by extending the list of assets that it covers. The paper sets out the conditions under which greater accuracy would be assured.     

On the Welfare Significance of National Product for Economic Growth and Sustainable Development

This paper formulates an investment value transversality condition in a continuous-time growth model, which characterizes competitive paths along which current net national product measures the welfare achieved along the path. This transversality condition requires that the present value of net investment goes to zero asymptotically. An example provided shows that, in general, competitive paths do not necessarily satisfy this condition. It is also shown that, in a standard growth model including an exhaustible resource as an essential factor of production, competitive paths always satisfy this condition. Implications regarding national income accounting procedures and sustainable development policies are discussed.
JEL Classification Numbers: D90; O11; O41; Q32.     

Green Accounting in Imperfect Market Economies

The idea of measuring the national welfare level by using the green NNP (net national product) has gained much attention lately. This paper summarizes the research on social accounting in imperfect market economies by putting the results into a unified framework. The main contribution of the paper is to relate the form of the national welfare measure to the functioning of the economic system and, therefore, to explicitly address the informational requirements implicit in social accounting.     

GENUINE SAVING AND POSITIONAL EXTERNALITIES

Much evidence suggests that people are concerned with their relative consumption. Yet, positional externalities have so far been ignored in savings‐based indicators of sustainable development. This article examines the implications of relative consumption concerns for measures of sustainable development by deriving analogues to genuine saving when people are concerned with their relative consumption. Unless the positional externalities have been internalized, an indicator of such externalities must be added to genuine saving to arrive at the proper measure of welfare change. We also show how relative consumption concerns affect the way public investment ought to be reflected in genuine saving.     

Multi-dimensional risk and the cost of business cycles

This paper analyzes the welfare costs of business cycles when workers face uninsurable idiosyncratic labor income risk. In accordance with the previous literature, this paper decomposes labor income risk into an aggregate and an idiosyncratic component, but in contrast to the previous literature, this paper allows for multiple sources of idiosyncratic labor income risk. Using the multi-dimensional approach to idiosyncratic risk, this paper provides a general characterization of the welfare cost of business cycles when preferences and the (marginal) process of individual labor income in the economy with business cycles are given. The general analysis shows that the introduction of multiple sources of idiosyncratic risk never decreases the cost of business cycles, and strictly increases it if there are cyclical fluctuations across the different sources of risk. This paper also provides a quantitative analysis based on a version of the model that is calibrated to match US labor market data. The quantitative analysis suggests that realistic variations across two particular dimensions of idiosyncratic labor income risk increase the welfare cost of business cycles by a substantial amount.     

SOCIAL CHALLENGES TO ECONOMIC ACCOUNTING AND ECONOMIC CHALLENGES TO SOCIAL ACCOUNTING

The question addressed in this paper is: Why can't we have a good measuring rod of the economic and social performance of our society? The answers are basically positive but lie mostly in the direction of (1) avoiding simplistic solutions such as turning the national income accounts into a measure of social welfare and (2) providing the elements of an information strategy to obtain such a measure or more accurately such a set of measures. The proposed information strategy highlights five activities: (1) the presentation and analysis of welfare outcomes, an activity which is analogous to but broader than “social indicators”; (2) social accounting which includes economic accounting, demographic accounting, and time-use accounting; (3) model building and operation which, unlike accounting, are concerned with behavioral or causal relationships used to explain and project welfare outcomes; (4) hypothesis testing to develop new insights into economic and social behavior; and finally (5) the building and maintenance of a data base required for carrying on the aforementioned four activities.     

OPTIMAL GROWTH, GENUINE SAVINGS AND LONG-RUN DYNAMICS

Green accounting theories have shown that negative genuine savings at some point in time imply unsustainability. Consequently, recent studies advocate the use of the genuine savings measure for empirical testing: a negative index implies that sustainability be rejected. However, this criterion cannot ascertain sustainability, because positive current genuine savings do not rule out genuine dissaving in the future. This paper derives a one‐to‐one relationship between the sign of long‐run genuine savings and the limiting condition for sustained utility in the capital‐resource growth model, assuming technical progress and resource renewability. This result suggests to extend the genuine saving method to include a test of the limiting condition: if this condition is empirically rejected, positive current genuine savings are delivering a false message.     

Adjusted net saving and welfare change

The World Bank has estimated Adjusted net (or genuine) saving (ANS) as a macro level index of sustainable development. ANS extends the conventional net saving by adding human capital accumulation and deducting natural resources losses. This paper tests ANSas an index of sustainable development. It examines whether ANS explains changes in welfare. Welfare is measured by Infant mortality rate (IMR) and Human Development Index (HDI). The study was conducted in 36 selected developing and developed countries and covers the period 1971-2000. The results suggest a positive and significant relationship between Adjusted net saving and aggregate welfare but weak in magnitude.     

National Income Accounting and Public Policy

Modern national income accounting was designed in the early 20th century for the purpose of providing improved indicators about the performance of the economy so that government policy makers could better control the economy. The way that performance is measured affects the types of policies used to try to accomplish policy goals. Two attributes of national income accounting are analyzed for their effects on economic policy. First, government production is included in the national income accounts at cost, rather than at market value as private sector output is measured. This biases policy toward a larger public sector. Second, output is measured as a homogeneous dollar amount. This biases policy toward focusing on increasing quantities of inputs and outputs in the production process, rather than on innovation and entrepreneurship, which are the true engines of economic progress. Economic policy could be improved by focusing less on national income as an indicator of policy, and more on the underlying processes that foster economic progress.     

Wealth Accounting,Exhaustible Resources and Social Welfare

The empirical literature on natural resource accounting uses methods which implicitly or explicitly entail measuring changes in total resource asset value when an exhaustible resource is depleted. In contrast, the growth theoretic literature on saving, social welfare and sustainable development is built upon a central finding, that the change in real wealth (as measured by net or ‘genuine’ saving) is proportional to the change in social welfare. We show that the change in total wealth exceeds the change in real wealth in optimal and non-optimal models of resource-extracting economies. This suggests that the change in social welfare is over-estimated when the change in total resource asset value is used as the measure of depletion. A simple empirical exercise, using World Bank data on ‘adjusted net saving’, reinforces the results from theory.     

SOCIAL ACCOUNTING AND THE PUBLIC SECTOR*

This article contributes to the theory of social accounting. As such, it tries to extend earlier literature on the welfare equivalence of the comprehensive net national product in two main directions, both of which refer to the public sector. One is by considering welfare measurement problems associated with public good provision and redistributive policy, respectively, when the public revenues are raised by distortionary taxes. The other is by addressing the consequences of a “federation‐like” decision structure, where independent tax and expenditure decisions are made both by the central government and by lower level governments.     

TIME VS. GOODS: THE VALUE OF MEASURING HOUSEHOLD PRODUCTION TECHNOLOGIES

We take U.S. and Israeli household data on expenditures of time and goods, generate an exhaustive set of commodities that households produce/consume using them, and calculate their relative goods intensities. Leisure activities are uniformly relatively time intensive, health, travel and lodging relatively goods intensive. We demonstrate how education and age alter the goods intensity of household production. The results of this accounting can be used as guides to: understanding how goods and income taxation interact to affect welfare; expanding notions of the determinants of international flows of goods; generating models of business cycles and endogenous growth to include interactions of goods and time consumption; and obtaining better measures of the distribution of well being.