Issues in the Measurement and Interpretation of Saving and Wealth

Alternative measures of saving are developed and compared to the traditional NIPA estimates. Various data sources and estimation methodologies all conclude that adjustments for net saving in durables, government capital, capital gains and losses, and revaluations are substantial. For example, government capital and durables adjustments raise the NIPA estimate of net national saving in 1985 from 4.7% to 8.8%. New estimates of saving, developed and measured as the change in real net worth based on data from the Federal Reserve Flow of Funds National Balance Sheets, differ substantially from the NIPA estimates. For example, in 1986 and 1987, the NIPA net national saving measure is 1.8% and 1.9%, respectively, whereas my corresponding estimates from FED data are 11.5% and 3.3%. My new estimates of net private saving from FED data average 6.5% for the period 1981-87, versus 11.3% for the 1951-80 period. Net national saving has fallen even further, from an average of 11.2% in 1951-80 to 3.2% in 1981-87. Correspondingly, real private net worth reached 13.4 trillion (in constant 1982 dollars) by 1987, but its rate of growth slowed in the period 1979-87 relative to the postwar average. Various conceptual and measurement issues are discussed. Most important are 1) the appropriate level of aggregation across households of different age and type, sectors of the economy, and types of assets, and 2) improved measures of personal income to include as much currently unrecorded income as possible.

Notes on the Tax Treatment of Human Capital

Section 1 presents a preliminary attempt at clarifying the ways in which taxes affect human capital accumulation. Section 2 outlines a simple general equilibrium model with two capital goods - physical and human – and the saving corresponding to each, to begin to deal with these issues. Once human capital is viewed as an alternative source of wealth and hence human capital investment as a source of current saving (re-sources withdrawn from current consumption to help increase future output),the old issue of the differential tax treatment of alternative types of capital arises. Sensible tax policy with respect to the taxation of either physical or human capital must take into account the tax treatment of the alternative asset. Section 3 outlines some points of departure for such an analysis.

Taxation, Saving and the Rate of Interest

After exploring both the crucial role of the interest elasticity of the saving rate in the analysis of a wide variety of issues in economic - particularly tax - policy and reasons why previous studies of the effect of interest rates on consumption and saving have biased the estimated elasticity toward zero, this study presents new estimates of consumption functions based on aggregate U.S. time series data. The results are striking: a variety of functional forms, estimation methods and definitions of the real after-tax rate of return invariably lead to the conclusion of a substantial interest elasticity of saving.

Optimal Tax Theory: Econometric Evidence and Tax Policy

The purpose of this paper is to provide a progress report on the issue of the implications of optimal tax theory and recent econometric evidence for tax policy. Toward this end, Section 2 provides a brief and often heuristic summary of the major results of optimal tax theory. Section 3 reports the results of some recent econometric studies of saving and labor supply. Finally, Section 4 outlines the implications of the combined theory and econometric evidence for tax policy.

The role of rules in monetary policy (conference panel discussion)

Monetary policy - United States

The Effect of Social Security on Early Retirement

Our purpose in the present study is to analyze a new and rich body of data on the elderly to study the supply side of the effect of social security on the early retirement decision. Toward this end, section 2 presents a brief description of some previous studies of retirement behavior. While each in its own way has been suggestive, each also (including one by one of the current authors) has its own set of problems. Section 3 details the analytical framework of the present study. We propose several types of data from which one could obtain complementary information on the labor supply behavior of the elderly, and three approaches to analyzing a given body of data. We then propose a new way of estimating retirement behavior. Section 4 discusses the data used in this study: the Social Security Administration's Retirement History Survey. Section 5 reports our empirical results, estimates of probability of early retirement and early semiretirement equations. Section 6 concludes with a brief discussion of some of the implications of the study and suggestions for future research.

The Effect of Social Security on Retirement in the Early 1970s

Improved understanding of retirement behavior is a key to better understanding of many important economic problems. In as close as we can come to a general "social experiment," real Social Security benefits were increased substantially for the period we study the retirement patterns of a cohort of white males: 28% on average between 1970 and 1972, with the maximum benefit increased by over 50% in real terms between 1968 and 1976. Other important structural changes in the method of computing benefits were also made. Hence, we have extremely detailed longitudinal data on a cohort of people spanning the years of most active retirement behavior (ages 58-67) over a period of abrupt change in the economic incentives surrounding their retirement . We have analyzed these data in a variety of ways to examine the impact of the changes in Social Security, as well as other factors, on retirement probabilities. The most simple to the most sophisticated analyses reveal the same set of inferences: 1. The acceleration in the decline in the labor force participation of elderly men over the period 1969-73 was primarily due to the large increase in real Social Security benefits; our probability equations estimate effects of changes in real benefits combined with the actual changes to predict declines in participation rates virtually identical to actual observed changes from independent data. 2. Social Security wealth interacts with other assets. A substantial fraction of the elderly appear to have few other assets and this group shows a markedly larger propensity to retire early, e.g., at age 62 when Social Security benefits become available. We find strong evidence of this liquidity constraint effect for an important subgroup of the elderly. 3. The magnitude of the induced retirement effect is large enough that if it is ignored in estimating the direct fiscal implications of major changes in benefit provisions, these may be substantially underestimated . 4. We interpret our results in the historical context of a particular cohort undergoing a major, unanticipated transfer of wealth via larger real benefits. We make no attempt to distinguish these from the long- run effects if the system were to remain unchanged for many years or if future changes were readily predictable.

An Analysis of U.S. Postwar Consumption and Saving: Part II -- Empirical Results

A new empirical analysis of aggregate United States consumption and saving for the period 1947-80 is presented. The model is based on the theory of exact aggregation. It recognizes explicitly that households with different characteristics may be heterogeneous in their behavior and that aggregate behavior may depend on the changing composition of households by characteristics and therefore may not be adequately portrayed by a representative consumer, but otherwise it imposes minimal assumptions on household behavior. The model integrates longitudinal and cross-sectional microeconomic data on household characteristics with the traditional aggregate time-series data. Various hypotheses on consumption, such as age independence, proportionality to wealth, and price independence, are tested , and rejected. Strong evidence of relative price effects and a systematic variation of aggregate consumption with changing age distribution of wealth in the economy is found. Especially important is the substantial estimated difference in the shares of wealth consumed between households headed by persons born prior to and those born after 1939. One important lesson from this study is that modeling the aggregate U.S. economy as a representative consumer may give rise to misleading results.