Purchasing management in the luxury industry: organization and practices

Traditional supply chain models were developed mainly for non-luxury companies and find very little correspondence in the field of luxury, which is considered here as a business super-area including heterogeneous enterprises, belonging to different sectors, which have in common customers characterized by the “need for luxury”. The objective of this paper is to investigate, through a multiple case-study research, peculiar purchasing and supply management practices put in place by luxury firms and to provide a classification of the most recurring approaches. Relevant dimensions (i.e. product complexity and sale volume) to classify luxury firms practices have been used: as a result, four groups of companies have been identified and their purchasing practices described.     

On the Ramsey equilibrium with heterogeneous consumers and endogenous labor supply

In this paper, we address the stability issue, stressing the role of labor supply, in a Ramsey model with heterogeneous households subject to borrowing constraints. Making labor supply endogenous leads us to prove the existence of two kinds of steady state: the one where everybody supplies labor, the other where only the most patient agent refrains from working. Going beyond models with inelastic labor supply, we show how preferences of impatient agents affect the saddle-path stability of each type of steady state and the occurrence of endogenous cycles. When their elasticity of intertemporal substitution in consumption exceeds one, instability and cycles are less likely, requiring lower degrees of capital-labor substitution. Conversely, elasticity values below one promote the emergence of fluctuations. We end the paper by showing the existence of the intertemporal equilibrium under market incompleteness, using a local approach based on the first-order conditions.     

Supply Determinants of Mining Companies: Evidence for Gold and other Minerals in South Africa

Supply determinants of mining companies have been identified in several factors, with no consensus on their relative importance. These factors, which include mineral commodity prices, the institutional framework, geological characteristics, the scale of mine operations, and specific features of the controlling holdings, can influence the objectives of the mines, and their ability to achieve these objectives. Following a brief overview of alternative literature hypotheses concerned with mineral supply determinants, statistical and econometric analyses are applied to partly pooled cross-mine data over the period 1984–95, for gold and other major export minerals in South Africa. — Des déterminants de l’offre des sociétés minières ont été identifiés dans différents facteurs sans qu’un consensus se dégage quant à leur importance relative. Ces facteurs, au nombre desquels figurent les prix des produits minéraux, le cadre institutionnel, les caractéristiques géographiques, la taille de l’exploitation minière et les caractéristiques de la société de holding majoritaire, peuvent influer sur les objectifs des mines et sur leur aptitude à atteindre ces objectifs. Après une brève revue des hypothèses sous-tendant diverses théories relatives aux déterminants de l’offre des produits minéraux, une analyse statistique et économétrique est effectuée à partir de données partiellement communes, portant sur la période 1984–95, concernant l’or et d’autres importants produits minéraux d’exportation en Afrique du Sud.     

Reconstruction and visualisation of melt topology in veined microdioritic enclaves

A number of xenocrystic microdioritic enclaves within the Ross of Mull Granite contain narrow veins of monzonitic material that have formed through the selective partial fusion of granitic magma mechanically incorporated into the microdiorite magma. Field evidence suggests that, as melting of the granitic material ensued, a monzonitic melt formed and exfiltrated from the surrounding microdioritic matrix resulting in Saffman–Taylor instabilities and the development of viscous fingering phenomena. The monzonitic melt network is now preserved as monzonitic veins. Mechanical serial sectioning through a representative veined microdioritic enclave shows that: (a) the topology of the veins is complex but crudely polyhedral, (b) there is porosity (monzonitic melt fraction) variation throughout the length of the veined enclave and (c) that the monzonitic veins are interconnected in three dimensions. Using image analysis software, the total porosity of individual veined enclave sections has been estimated, along with the variation in porosity with depth. Three dimensional rendering and animation software has been used to reconstruct and visualise the monzonitic melt network using Apple QuickTime? software. The above method provides a cheap and powerful way of visualising remnant macroscopic transport properties (such as connectivity and melt topology) in partially molten igneous rocks.     

Measures of economies with an arbitrarily large number of equilibria

Balasko (1978) shows that in a compact subset of the space of economies, not too many economies can have too many equilibria. We extend Balasko’s result to the whole set of economies for a suitable measure. We show that the measure of economies with a large number of equilibria approaches zero as this number tends to infinity. An analogous result in the infinite‐dimensional setting is also established.     

Factors Influencing Corporate Environmental Disclosure

In this paper, we have studied the factors that influence the environmental disclosures of Italian listed companies. We also aimed to verify the effects produced by the introduction of specific legislation (albeit of a voluntary nature) on environmental disclosures. The analysis has the advantage of including all of the informational documents produced by the company. The analysis shows an (excessively) low level of disclosure of environmental information by the companies examined. The econometric analysis then shows, contrary to our hypothesis and the results of previous analyses carried out in other countries, a negative and statistically significant relationship between environmental disclosures, the presences of minority shareholders and large auditors and the listing of the company, including in foreign markets. We lastly observed that the introduction of ad hoc legislation as purely voluntary only affects the contents of quantitative environmental disclosures, which are unsuitable for a highly industrialized developed country. Copyright © 2014 John Wiley & Sons, Ltd and ERP Environment     

Estimating loss-given default through advanced credibility theory

The New Basel Accord allows internationally active banking organizations to calculate their credit risk capital requirements using an internal ratings based approach, subject to supervisory review. One of the modeling components is the loss-given default (LGD): it represents the credit loss for a bank when extreme events occur that influence the obligor ability to repay his debts to the bank. Among researchers and practitioners the use of statistical models such as linear regression, Tobit or decision trees is quite common in order to compute LGDs as a forecasting of historical losses. However, these statistical techniques do not seem to provide robust estimation and show low performance. These results could be driven by some factors that make differences in LGD, such as the presence and quality of collateral, timing of the business cycle, workout process management and M&A activity among banks. This paper evaluates an alternative method of modeling LGD using a technique based on advanced credibility theory typically used in actuarial modeling. This technique provides a statistical component to the credit and workout experts’ opinion embedded in the collateral and workout management process and improve the predictive power of forecasting. The model has been applied to an Italian Bank Retail portfolio represented by Overdrafts; the application of credibility theory provides a higher predictive power of LGD estimation and an out-of-time sample backtesting has shown a stable accuracy of estimates with respect to the traditional LGD model.