Longevity and Life‐cycle Savings*

We add health and longevity to a standard model of life‐cycle saving and show that, under plausible assumptions, increases in life expectancy lead to higher savings rates at every age, even when retirement is endogenous. In a stationary population these higher savings rates are offset by increased old age dependency, but during the disequilibrium phase, when longevity is rising, the effect on aggregate savings rates can be substantial. We find empirical support for this effect using a cross‐country panel of national savings rates.     

Determinants of Household Savings: A Cross-Country Analysis

This paper analyses determinants of household savings in a model based on an extension of the disequilibrium savings theory. These extensions follow from the life-cycle and permanent-income theories. Based on panel data for 14 countries spanning the period 2000–2018, fixed-effect least squares and two-stage least squares estimation procedures were used. In line with previous studies, there is strong and robust evidence for the hypotheses of disequilibrium savings theory, specifically, positive effects of unanticipated income changes, unanticipated inflation and the lagged savings rate. There is also robust evidence for the income uncertainty hypothesis that uncertainty has a positive effect on savings. The analysis presents some evidence that social security suppresses savings, but finds no significant effects on the interest rate or old-age dependency ratio. Unexpectedly, the participation rate of the elderly has a significant positive effect in some specifications. These findings contribute to the debate on whether and how governments can influence saving behavior.

     

经济增长、人口结构变化与中国高储蓄

本文以生命周期理论为出发点,并运用中国1989—2006年的省际面板数据考察了经济增长、人口年龄结构变化以及它们的交互作用对中国储蓄率的影响。我们通过不同的识别方式和各种计量方法实证检验发现:市场经济转型带来的经济高速增长与人口政策转变带来的抚养系数下降导致中国储蓄率不断上升,经济增长对储蓄率上升的贡献随着适龄劳动人口数量的增加而被强化,但会随着人口老龄化程度的加深而被弱化。在使用了不同的识别方法与计量技术并控制了其他潜在影响中国储蓄率的各种因素后,我们的结果基本稳健。     

The determinants of household and private savings in Thailand

A broad set of possible determinants of household and private savings behaviour is examined through an in-depth case study of Thailand during the period 1960 to 2004. Results suggest that an increase in economic growth, inflation and terms of trade all have a significant positive impact on household and private saving rates. In contrast, the availability of bank credit tends to reduce household and private saving rates. While an increase in both old and young dependency has a negative impact on household and private saving rates, the magnitude of the impact on the former is far greater than that on the latter. Furthermore, public saving seems to crowd out household and private saving, but less than proportionately. This reflects a possible role of fiscal policy in increasing national savings in the economy. Over and above these variables, corporate saving is another important determinant of household saving. An increase in the former brings about a significant reduction in the latter.     

Demographics and real interest rates: Inspecting the mechanism

The demographic transition can affect the equilibrium real interest rate through three channels. An increase in longevity—or expectations thereof—puts downward pressure on the real interest rate, as agents build up their savings in anticipation of a longer retirement period. A reduction in the population growth rate has two counteracting effects. On the one hand, capital per-worker rises, thus inducing lower real interest rates through a reduction in the marginal product of capital. On the other hand, the decline in population growth eventually leads to a higher dependency ratio (the fraction of retirees to workers). Because retirees save less than workers, this compositional effect lowers the aggregate savings rate and pushes real rates up. We calibrate a tractable life-cycle model to capture salient features of the demographic transition in developed economies, and find that its overall effect is a reduction of the equilibrium interest rate by at least one and a half percentage points between 1990 and 2014. Demographic trends have important implications for the conduct of monetary policy, especially in light of the zero lower bound on nominal interest rates. Other policies can offset the negative effects of the demographic transition on real rates with different degrees of success.     

The saving–growth–inequality triangle in China

China's fast growth is perceived as a major determinant of its savings glut that contributes to global imbalances, but China's income inequality has been largely overlooked as the economy moves rapidly toward the Kuznets curve peak. This paper provides a new explanation for the complex issue of Chinese saving using a structural vector autoregressive (SVAR) model. We find that China's growth is positively affected by saving but has a limited effect on saving, that inequality mainly has a negative impact on growth but has a positive impact on saving, and that inequality is a stronger factor than growth in explaining high saving. Therefore, inequality must be mitigated to lower the high saving rate in China, and growth will be unaffected by lowering both inequality and saving.     

人口年龄结构对农村居民消费的影响研究——以浙江省为例

以生命周期假说为依据,通过引入人口年龄结构因素,构建了消费理论模型;利用2003~2011年的浙江省地市级面板数据,考察了少儿人口抚养比、老年人口抚养比与农村居民消费之间的关系。实证结果表明,少儿人口抚养比对农村居民消费呈显著的负向作用,少儿人口抚养比每增加1个单位,消费将平均减少0.044%;老年人口抚养比对农村居民消费呈显著的正向作用,老年人口抚养比每增加1个单位,消费将平均增加0.76%。当前浙江省少儿人口抚养比呈递减态势,而老年人口抚养比则呈递增态势,两者协同促进了农村居民的消费。     

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.     

The Effect of Life Expectancy on Fertility,Saving, Schooling and Economic Growth: Theory and Evidence*

We construct a simple growth model where agents with uncertain survival choose schooling time, life‐cycle consumption and the number of children. We show that rising longevity reduces fertility but raises saving, schooling time and the growth rate at a diminishing rate. Cross‐section analyses using data from 76 countries support these propositions: life expectancy has a significant positive effect on the saving rate, secondary school enrollment and growth but a significant negative effect on fertility. Through sensitivity analyses, the effect on the saving rate is inconclusive, while the effects on the other variables are robust and consistent. These estimated effects are decreasing in life expectancy.     

Efficiency in overlapping generations economies with longevity choices and fair annuities

When individuals can influence their life-expectancies and save in annuities, suboptimal savings result from the lack of incentives to choose the optimal longevity, even when annuity returns can be made contingent to longevity-related choices. Specifically, the golden rule steady state maximizing the representative agent utility cannot be attained as a competitive equilibrium under laissez-faire, even with actuarially fair annuities contingent to longevity-enhancing choices. In order to decentralize through markets the golden rule, longevity-enhancing expenditures need to be taxed if the steady state old-age consumption exceeds the annuitized capital return, and subsidized otherwise—the government budget being balanced through lump-sum transfers or taxes. Interestingly, with positive population growth the expected net contribution is negative when longevity-enhancing expenditures are taxed, and positive when subsidized.     

The relationship ageing of the population and saving in an unemployment context: Empirical evidence using an autoregressive distributed lag bounds testing approach

In this article, we emphasised that ageing population does not systematically depress savings by drawing attention to the factors that may distort that prediction of the life‐cycle hypothesis (LCH). To demonstrate it, we used two indicators for ageing: the total and aged dependency ratios and we looked at the economic context influence on national saving evolution through considering the labour market imbalance interference. By applying the autoregressive distributed lag approach, with Tunisian data during 1970–2018, a dynamic long‐run relationship between ageing and national saving is found, although it seemed to be sensitive to the used ageing indicator and the economic context. Indeed, the LCH is proved only by the total dependence ratio whereas the aged dependence ratio puts a significant long‐run upward pressure on saving. Further, in a context of unemployment without any benefit scheme, the LCH prediction cannot be endorsed by the two indicators. Hence, the social and economic conditions limit the LCH scope, bearing out that elderly not depress systematically savings. Therefore, to sustain saving major economic and financial reforms are needed, as to postpone the retirement age, to move from pay‐as‐you‐go system towards funded pension system, to promote life insurance and to diversify the long‐run savings products.     

Who is saving privately for retirement and how much? New evidence for Germany

Due to demographic change, the replacement rates of the German statutory pension scheme will decrease over the next decades. Voluntary savings for retirement will therefore increase in relevance as a method of maintaining one’s standard of living during retirement. This article examines the savings behavior for retirement on an individual level in Germany at the extensive as well as the intensive margin. First, the decision to save in general is analyzed, showing that the main determinants for saving are personal income and disposable household income. Furthermore, it is shown that migrants and individuals living in the Eastern part of Germany turn out to be less likely to have additional private savings. Second, the chosen gross saving rates are analyzed using a Tobit model, a log-normal hurdle model and a Type II Tobit model. The results suggest that the decision to save in general, as well as the saving rate, are independent of each other, leading to a loss of information if only a standard Tobit model is used. For example, higher personal income increases the probability to save for retirement, but decreases the resulting saving rate. Modeling both decisions separately thus, leads to a better understanding of the determinants of saving for old-age.     

Private saving in India and Malaysia compared: the roles of financial liberalization and expected pension benefits

In this article, we provide a comparative account of the evolution of private saving in India and Malaysia, and analyze how policy changes in the financial sector and pension system help explain differences in their saving performance. Using the Autoregressive Distributed Lag (ARDL) bounds estimation procedure, we find a fairly robust long-run relationship between private saving and its determinants in both countries. Consistent with the predictions made in the life cycle model, our results indicate that higher income growth stimulates private saving and an increase in age dependency retards private saving. The results provide some support for the hypothesis that financial liberalization results in lower private saving in both countries. The evidence also indicates that expected pension benefits tend to stimulate private saving in India, but that the reverse is found in Malaysia.     

Savings and investment in Australia

It has become popular to advocate tax reduction on the basis of promoting savings, investment and ultimately economic growth. The linkage between the variables is argued by various neoclassical growth models and is further suggested by recent studies which highlight the close association between domestic saving and investment rates. The close association may allow for polices which alter domestic saving levels in order to alter domestic investment levels. This interpretation, however, presumes an endogenous investment response. Equally likely, theoretically, is that the close association is maintained by movements in national savings. The present paper explicitly examines the endogeneity of the Australian saving and investment rates. The results highlight the exogeneity of investment. The results further suggest an endogenous response on the part of Australia's saving rate. The results may limit the potential benefits of these tax changes.     

Structural change,savings and current account balance

Private savings have experienced remarkable divergences across countries in recent years. In this paper we use a new factor, economic structural changes, to explain the differences of private savings in developing countries and its impacts on current account balance. We point out that growth related structural changes can be decomposed into productivity changes and job reallocations, which will affect private savings differently through wage effect and labor reallocation effect. Wage variation resulting from productivity growth will increase private savings, while labor reallocation moving from low income to high income sectors will reduce savings. Using sector level data, we find strong empirical evidence that structural change patterns have a significant impact on private savings and current account balance. This result provides another way to understand the recent “savings glut” in East Asian countries and also has some implications for the large current account imbalance issue.     

Has the capital accumulation in the Asian miracle economies been fuelled by growth?

The Asian growth miracle is often attributed to factor accumulation under the implicit assumption that savings, broadly defined, have been high and increasing due to exogenous forces. Using data for India, Indonesia, Korea, Singapore and Taiwan over the period 1870–2011 this article examines the causal relationship between growth and saving. The response of growth to savings is first estimated using instruments to generate exogenous variation in savings rates. The residual variation in growth that is not driven by savings is then used as an instrument to estimate the effect of growth on savings. The estimates show that the spectacular saving rates in the Asian miracle economies have been fuelled by growth, and not the other way around.     

Income Inequality and Economic Growth: Evidence from American Data

While most cross-country studies find a negative relationship between income inequality and economic growth, studies that use panel data suggest the presence of a positive relationship between inequality and growth. This paper uses a cross-state panel for the United States to assess the relationship between inequality and growth. Using both standard fixed effects and GMM estimations, this paper does not find evidence of a positive relationship between inequality and growth but finds some evidence in support of a negative relationship between inequality and growth. The paper, however, shows that the relationship between inequality and growth is not robust and that small differences in the method used to measure inequality can result in large differences in the estimated relationship between inequality and growth.     

Does the quality of institutions enhance savings? The case of Sub-Saharan Africa

Over the last three decades, there has been increasing disparity in savings across regions and income groupings globally. In this paper, we investigate whether the quality of institutions explains the saving disparities in Sub-Saharan Africa (SSA). Utilizing comprehensive panel data and spanning the period 1980–2015, we estimate a savings model using the two-step instrumental variable generalized method of moment (2SIV-GMM) estimator. Our results show that the impact of institutions on savings behaviour differs across regions and income groupings, and in SSA, in aggregate. We find that the level and growth of per capita income and terms of trade enhance savings whereas government consumption expenditure, financial sector development and the elderly dependency rate are savings impeding. The findings are robust to alternative model specification and highlight the importance of institutions in influencing savings behaviour in SSA.     

Determinants of private savings behaviour in Turkey

This study investigates the effects on private saving rates of a number of policy and non-policy variables. The analysis covers the period 1968–1994. The empirical private saving model for Turkey is estimated. The findings support the hypothesis that private saving rates have strong inertia. The evidence indicates that government saving does not tend to crowd out private savings and the Ricardian equivalence does not hold strictly. Income level has a positive impact on private saving rate, and growth rate of income is not statistically significant. From a policy point of view, financial depth and development measures in Turkey suggest that countries with deeper financial systems tend to have higher private saving rates. Private credit and real interest rates try to capture the severity of the borrowing constraints and the degree of financial repression for Turkey. Moreover, the negative impact of life expectancy rate lends support to the life-cycle hypothesis. The precautionary motive for saving is supported by the findings that inflation captures the degree of macroeconomic volatility and has a positive impact on private saving in Turkey.     

Uncertain Pension Income and Household Saving

This paper investigates the relationship between household saving and pensions, and estimates both the displacement effect of pensions on private saving and the precautionary saving effect due to uncertainty in pension income. I estimate the savings equation implied by a simple life‐cycle model featuring income uncertainty using survey data for Dutch households, with subjective expectations on pension benefits and uncertainty. Exploiting exogenous variation due to pension fund performance, I find that households save significantly more due to uncertainty in pension income. Not controlling for uncertainty biases the estimated displacement effect of pensions on private savings towards zero.