Un modello matriciale per la dominanza stocastica e stocastico-temporale

In questa nota si estendono alcuni precedenti risultati dovuti a Beccacece-Castagnoli [1]–[2] e Levi [7], sulla dominanza temporale, stocastica e stocastico-temporale tra flussi finanziari, certi o aleatori, nel caso discreto e finito. Largo spazio viene anche dato ad esempi critici e controesempi.

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Summary This paper extends previous results by Beccacece-Castagnoli [1]–[2] and Levi [7] on time dominance, stochastic dominance, time-stochastic dominance for discrete, finite, deterministic or stochastic, cashflows. Last sections are devoted to critical examples and counterexamples.

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Ricerca parzialmente finanziata dal M.U.R.S.T. e dall'Università Bocconi.     

区域交通与土地利用耦合关系研究

在系统分析了区域交通与土地利用特征的基础上,对区域交通与土地利用的相互作用机制进行了研究,并提出了区域交通-土地利用耦合系数的概念.以黄石市1996-2004年间的交通、城镇建设和耕地的用地规模进行分析,结果显示近年来黄石市的交通-土地利用存在较为密切的关系,近年来交通得到较大发展,因而耦合系数呈增长趋势.     

Differential mortality and social security

Abstract This paper studies the normative problem of redistribution between individuals who differ in their lifespans. We discuss aspects related to the objective function and argue that aversion to multiperiod inequality should be taken into account. Then, we study the properties of the social optimum both with full information and with asymmetric information. We highlight the role of aversion to multiperiod inequality and show that it has substantial consequences on the design of Social Security schemes. In particular, we show that for a low (resp. high) aversion to multiperiod inequality, a negative (resp. positive) implicit tax rate on continued activity is desirable.     

Will India Be the Next China? Challenges,Prospects and Implications for Australia

India's recent growth performance has been impressive and it appears set to again become a major global economic power. But, sustaining this growth poses formidable challenges. Australia stands to gain much from India's growth. In this article, we review recent developments in the Indian economy, identify policy challenges and discuss short‐to‐medium term prospects, noting some of the main similarities and differences between China and India. Then, we look at opportunities for significant growth in Australian–Indian economic links and policy implications including the possible role of a free trade agreement.     

Short-term wholesale funding and systemic risk: A global CoVaR approach

We use the CoVaR approach to identify the main factors behind systemic risk in a set of large international banks. We find that short-term wholesale funding is a key determinant in triggering systemic risk episodes. In contrast, we find weaker evidence that either size or leverage contributes to systemic risk within the class of large international banks. We also show that asymmetries based on the sign of bank returns play an important role in capturing the sensitivity of system-wide risk to individual bank returns. Since short-term wholesale funding emerges as the most relevant systemic factor, our results support the Basel Committee’s proposal to introduce a net stable funding ratio, penalizing excessive exposure to liquidity risk.     

Underwriting the elderly: the utility of DWR, part II

Cognitive function is an important predictor of mortality in the elderly. Over the past few years, an increasing number of life insurance companies have incorporated screening for cognitive impairment into the underwriting process at older ages. Many different test instruments provide a measurement of cognitive function. Among these, the 10 word delayed word recall test (DWR) offers the best opportunity to study mortality directly, because of a long history of use in long-term care risk assessment. This article revises and extends a previous report published in the Journal in 2006 looking at the relationship between DWR score and mortality.