Prudence and precautionary saving

Households save income for various reasons, including the need to plan for the future, the intention to leave a bequest, and the desire to guard against unforeseen expenditures and income fluctuations. Although it is widely believed that prudent individuals engage in precautionary saving, the extent of such saving is not well understood. This paper develops a model of saving with an explicit role for the Leland-Kimball measure of prudence. Estimation of the model using household-level data from Italy suggests an average value of relative prudence near 4 or 5, with approximately 15 to 36 percent of total saving being precautionary. The authors are grateful to an anonymous referee for helpful comments.     

Risk premia in general equilibrium

This paper shows that non-linearities from a neoclassical production function alone can generate time-varying, asymmetric risk premia and predictability over the business cycle. These empirical key features become relevant when we allow for non-normalities in the form of rare disasters. We employ analytical solutions of dynamic stochastic general equilibrium models, including a novel solution with endogenous labor supply, to obtain closed-form expressions for the risk premium in production economies. In contrast to an endowment economy with constant investment opportunities, the curvature of the consumption function affects the risk premium in production economies through controlling the individual's effective risk aversion.     

Tender-offer premia as a management signal

In this paper we test whether tender-offer premia for share repurchases can be viewed as an outgrowth of optimizing behavior by managers in a signalling environment. This is in contrast to previous work on the signalling hypothesis which focuses on the stock market's reaction to the announcement of tender offers. Our empirical results indicate that premia are systematically related to the price of the firm's stock and the level of the stock market but are not related to either management compensation, inside holdings of stock or the ratio of shares sought to total shares.     

Probabilistic forecasts of volatility and its risk premia

The object of this paper is to produce distributional forecasts of asset price volatility and its associated risk premia using a non-linear state space approach. Option and spot market information on the latent variance process is captured by using dual ‘model-free’ variance measures to define a bivariate observation equation in the state space model. The premium for variance diffusive risk is defined as linear in the latent variance (in the usual fashion) whilst the premium for variance jump risk is specified as a conditionally deterministic dynamic process, driven by a function of past measurements. The inferential approach adopted is Bayesian, implemented via a Markov chain Monte Carlo algorithm that caters for the multiple sources of non-linearity in the model and for the bivariate measure. The method is applied to spot and option price data on the S&P500 index from 1999 to 2008, with conclusions drawn about investors’ required compensation for variance risk during the recent financial turmoil. The accuracy of the probabilistic forecasts of the observable variance measures is demonstrated, and compared with that of forecasts yielded by alternative methods. To illustrate the benefits of the approach, it is used to produce forecasts of prices of derivatives on volatility itself. In addition, the posterior distribution is augmented by information on daily returns to produce value at risk predictions. Linking the variance risk premia to the risk aversion parameter in a representative agent model, probabilistic forecasts of (approximate) relative risk aversion are also produced.     

Bequest motives and household money demand

The bequest motive is an important motive determining intergenerational transfers of income, saving, and money. However, it has received little or no attention from past studies on money demand. This study utilizes panel data to show that the bequest motive is positively related to money demand and interacts with the life-cycle motive during various stages of an individual’s life. Householders with bequest motives are more likely to transfer a greater proportion of their permanent incomes to monetary assets than those without bequest motives.     

Tests of risk premia in linear factor models

We show that statistical inference on the risk premia in linear factor models that is based on the Fama–MacBeth (FM) and generalized least squares (GLS) two-pass risk premia estimators is misleading when the β$\beta$’s are small and/or the number of assets is large. We propose novel statistics, that are based on the maximum likelihood estimator of Gibbons [Gibbons, M., 1982. Multivariate tests of financial models: A new approach. Journal of Financial Economics 10, 3–27], which remain trustworthy in these cases. The inadequacy of the FM and GLS two-pass t$t$/Wald statistics is highlighted in a power and size comparison using quarterly portfolio returns from Lettau and Ludvigson [Lettau, M., Ludvigson, S., 2001. Resurrecting the (C)CAPM: A cross-sectional test when risk premia are time-varying. Journal of Political Economy 109, 1238–1287]. The power and size comparison shows that the FM and GLS two-pass t$t$/Wald statistics can be severely size distorted. The 95% confidence sets for the risk premia in the above-cited work that result from the novel statistics differ substantially from those that result from the FM and GLS two-pass t$t$-statistics. They show support for the human capital asset pricing model although the 95% confidence set for the risk premia on labor income growth is unbounded. The 95% confidence sets show no support for the (scaled) consumption asset pricing model, since the 95% confidence set of the risk premia on the scaled consumption growth consists of the whole real line, but do not reject it either.     

Debt stabilization games in the presence of risk premia

As a result of the recent financial crisis and the ensuing economic recession, fiscal deficits have soared in many OECD countries. As a consequence, government debt has been on the rise again after a period of stable or declining government debt. In this paper we analyze debt stabilization in a country that features endogenous risk premia, imposed by financial markets that evaluate the probability of debt default by governments. Endogenous risk premia arise by assuming, e.g., simple linear relations between risk premia and the level of debt. As a result the real interest rate on government debt can be written as a constant (measuring the risk-free real interest rate corrected for real output growth) plus an endogenous risk premium that depends on the debt level. We bring such an endogenous risk premium into Tabellini (1986) model and analyze the impact of it. This gives rise to a non-linear differential game. We solve this game for both a cooperative setting and a non-cooperative setting. The non-cooperative game is solved under an open-loop information structure. We present a bifurcation analysis w.r.t. the risk premium parameter.     

Modeling common volatility characteristics and dynamic risk premia in European equity markets

The paper applies a Factor-GARCH model to evaluate the impact of the market portfolio, as a single common dynamic risk factor, on conditional volatility and risk premia for the returns on size-based equity portfolios of three major European markets; France, Germany and the United Kingdom. The results show that for the size-based portfolios the factor loading for the dynamic market factor is significant and positive but the association between the risk premia and the conditional market volatility is weak. However, the dynamic market factor is shown to explain common characteristics in the conditional variance such as asymmetry and persistence. This finding is consistent across markets and portfolio sizes.     

Dynamic estimation of volatility risk premia and investor risk aversion from option-implied and realized volatilities

This paper proposes a method for constructing a volatility risk premium, or investor risk aversion, index. The method is intuitive and simple to implement, relying on the sample moments of the recently popularized model-free realized and option-implied volatility measures. A small-scale Monte Carlo experiment confirms that the procedure works well in practice. Implementing the procedure with actual S&P500 option-implied volatilities and high-frequency five-minute-based realized volatilities indicates significant temporal dependencies in the estimated stochastic volatility risk premium, which we in turn relate to a set of macro-finance state variables. We also find that the extracted volatility risk premium helps predict future stock market returns.     

混凝土泵堵管故障分析及预防措施

泵送混凝土因作业速度快、生产效率高、劳动强度低而被施工单位广泛使用,但泵送过程中的堵管是经常出现的难以处理的问题。文章对泵送混凝土堵管的原因进行了分析,提出了解决办法和预防措施。     

第三方物流的发展动因、利益及其实施策略

通过对第三方物流的发展动因、利益及其实施策略进行分析，对于我们理解现代物流的本质，明确传统物流与现代物流的区别，把握当今物流的发展趋势，实施第三方物流，促使现有物流企业向现代物流企业的系统转型，具有重要的意义。     

高储蓄率、转移成本与农民工储蓄率

研究探讨了储蓄率问题的分析思路,结合中国二元经济体制长期存在的基本国情,认为农民工群体的存在及其高储蓄率是中国居民整体高储蓄率的重要原因,考虑到农民工群体的高流动性的特征,那么转移成本是农民工必然要面对的社会现实。研究解释了转移成本存在的必然性,通过农民工的消费储蓄决策模型从理论上论述了转移成本与农民工储蓄率存在正相关,并进一步结合2013年和2015年卫计委流动人口动态监测数据对上述结论进行了验证。     

电梯节能中能量回馈节能技术的有效运用

目前,我国已成为全世界推广和使用节能电梯最多的国家。电梯节能成为电梯设计的主要方向。文章介绍了能量回馈和电梯能量回馈技术及工作原理,以及回馈技术在电梯中的应用和电梯节能的必要性,以求在电梯设计中,使能量回馈得到更好的发挥,节约能源。     

New tips from TIPS: Identifying inflation expectations and the risk premia of break-even inflation

This paper decomposes the break-even inflation rates derived from inflation-indexed bonds into inflation risk premia, liquidity risk premia, and inflation expectations. I estimate a common factor model with autoregressive conditionally heteroscedastic (ARCH) errors that extracts co-movements from twenty-two monthly and quarterly indicators to identify these three components. The results indicate that the sharp declines in the 10-year and 5-year break-even inflation rates in 2009 reflect a substantial increase in liquidity risk rather than a decrease in inflation expectations. Break-even inflation rates underestimate inflation expectations over nearly the entire sample due to the liquidity risk premia carried by the inflation indexed bond yields. Also, the model-implied inflation expectations show better forecast performance for the average annual inflation rates than raw break-even inflation rates, the Survey of Professional Forecasters, and the Surveys of Consumers inflation forecasts.     

Exploring the motives and success factors behind female entrepreneurs in India

Quality & Quantity - Encouraging women as entrepreneurs in the recent scenario are the government initiative over the globe. Some women started these small enterprises to support their living...     

Studying co-movements in large multivariate data prior to multivariate modelling

For non-stationary vector autoregressive models (VAR hereafter, or VAR with moving average, VARMA hereafter), we show that the presence of common cyclical features or cointegration leads to a reduction of the order of the implied univariate autoregressive-integrated-moving average (ARIMA hereafter) models. This finding can explain why we identify parsimonious univariate ARIMA models in applied research although VAR models of typical order and dimension used in macroeconometrics imply non-parsimonious univariate ARIMA representations.