Persistence,Long Memory,and Unit Roots in Commodity Prices

This article investigates the degree of persistence in several weekly and monthly agricultural prices (corn, soybeans, barrow and gilts, and milk) using long memory (fractional integration) techniques. The results indicate mean reversion (i.e., orders of integration smaller than one) in some of the agricultural prices like corn, milk, and barrow and gilts when the disturbances are autocorrelated. Further, we examine the stability across time in the degree of dependence, and the results indicate that the fractional differencing parameters have not remained constant across time. When we take into account a structural break we find that during the first subsamples, the series are stationary though highly persistent, with orders of integration close to 0 and with large autoregressive coefficients. However, for the periods after the break, the series seem to be nonstationary I(1). Dans le présent article, nous avons étudié le degré de persistance des prix hebdomadaires et mensuels de plusieurs produits agricoles (maïs, soja, castrats et cochettes, lait) à l’aide de tests de mémoire longue (intégration fractionnaire). Nos résultats indiquent une stationnarité (c.‐à.‐d. des ordres d’intégration inférieurs à un) des prix de certains produits agricoles, tels que le maïs, le lait, les castrats et cochettes, lorsque les perturbations sont autocorrélées. Nous avons également étudié la stabilité du degré de dépendance à travers le temps, et nos résultats indiquent que les paramètres de différenciation fractionnaire ne sont pas demeurés constants. Lorsque nous avons tenu compte d’une rupture structurelle, nous avons trouvé que dans les premiers sous‐échantillons, les séries étaient stationnaires quoique très persistantes, avec des ordres d’intégration près de 0 et d’importants coefficients d’autorégression. Dans le cas des périodes suivant la rupture, les séries semblaient non stationnaires I(1).     

Volatility transmission along the money market yield curve

Volatility Transmission along the Money Market Yield Curve. - The authors model the volatility of money market interest rates — and the transmission of volatility - along the money market yield curve in the UK, Germany, France and Spain. They find a significant volatility transmission from overnight to longer-term money market rates in France, Spain and the U.K. They also find that the countries with lower (higher) reserve requirements tend to have higher (lower) interbank interest rate volatility. However, reserve requirements generate a perverse seasonal effect at the end of the maintenance period.     

Designing minimum-cost recycling collection networks with required throughput

The problem of designing minimum-cost recycling networks with required throughput is a subset of the broader class of facility location problems in which the recycler wishes to determine the optimal number and location of receiving centers as well as the correct financial incentive to be offered in order to stimulate collection of used or unrecoverable products to a degree required for regulatory reasons or otherwise. This paper presents a conceptual framework, an analytical model, and a three-stage algorithmic solution for this problem. An illustrative case study in the recycling of unrecoverable tires in southern states of Brazil is presented.     

Growth Due To Globalization*

This article presents a growth model including geographical space and transportation costs in which the geographical area where firms sell their product is endogenous. Growth is generated by the expansion of trade and there is a positive relationship between degree of openness and income level. The model explains why economies become increasingly more open and why the degree of openness is not robustly correlated with growth. In contrast to other growth models, investment in transport infrastructure plays an important role and the size of the country does not affect growth.     

Conspicuous Consumption and Social Segmentation

This paper develops the idea that conspicuous consumption has an impact on social segmentation, i.e., on the partition of the society into communities. Even though agents do not value conspicuous goods per se, they are competing in a signalling race in order to benefit from social interactions within a community. First, we study the equilibria of this model defining the optimal strategies and the equilibrium partition that characterizes pooling and separating equilibria. In a second step, as conspicuous consumption is a pure waste of money, we study a possible Pareto–improving taxation policy.     

Memory Systems In Organizations: An Empirical Investigation Of Mechanisms For Knowledge Collection, Storage And Access

This research examines the concept of organizational memory in the context of multi‐unit organizations. It addresses the question: how do organizations collect, store and provide access to their experiential knowledge? I develop a framework for organizational memory in geographically distributed settings based on the concept of organizational memory systems and empirically assess the usefulness of this framework in the context of a multinational, business consulting organization. Multiple memory systems were identified, including social networks, knowledge centers and various computer‐based systems. I present and discuss findings with respect to the characteristics and perceived effectiveness of these memory systems.     

DO MARKETS PENALIZE AGENCY CONFLICTS BETWEEN CONTROLLING AND MINORITY SHAREHOLDERS? EVIDENCE FROM CHILE

Using a sample of Chilean listed firms with widespread presence of economic conglomerates that use pyramid structures to control affiliated companies, we find that firms where controlling shareholders have higher coincidence between cash and control rights are persistently more valued by the market. We carefully check that our results are not driven by omitted variable biases and control for reverse causation using a feature of Chilean Corporations Law that provides an exogenous instrument for ownership concentration.     

Exchange Rates,Employment and Labour Market Rigidity

In this paper, we study the effect of labour market rigidity on the impact of exchange rate shocks on employment. We use a panel dataset comprising 22 manufacturing sectors across 23 OECD countries. In our econometric model, the impact of exchange rate fluctuations on sectoral employment is mediated by the degree of openness and by a measure of labour market rigidity: the OECD's employment protection legislation (EPL) index. Our results suggest that greater labour market rigidity reduces the impact of exchange rate shocks on employment. This effect is statistically significant for low‐technology sectors.