Does less inequality among households mean less inequality among individuals?

Consider an income distribution among households of the same size in which individuals, equally needy from the point of view of an ethical observer, are treated unfairly. Individuals are split into two types, those who receive more than one half of the family budget and those who receive less than one half. We look for conditions under which welfare and inequality quasi-orders established at the household level still hold at the individual one. A necessary and sufficient condition for the Generalized Lorenz test is that the income of dominated individuals is a concave function of the household income: individuals of poor households have to stand more together than individuals of rich households. This property also proves to be crucial for the preservation of the Relative and Absolute Lorenz criteria, when the more egalitarian distribution is the poorest. Extensions to individuals heterogeneous in needs and more than two types are also provided.     

Forest and water: The value of native temperate forests in supplying water for human consumption: A comment

In a recent paper in this journal Nuñez et al. [Nuñez, D., L. Nahuelhual, and C. Oyarzun, 2005. Forest and water: the value of native temperate forests in supplying water for human consumption. Ecological Economics 58: 606-616] presented a model to estimate the economic value of Chilean temperate forests in their function to contribute to maintain fresh water supply. We discuss and correct the estimated values of ecosystem services per household and per hectare.     

Sul ruolo dei riassunti esaustivi ai fini della previsione in contesto Bayesiano (2a parte)

Proseguendo nella ricerca, la cui prima parte è stata pubblicata nel precedente numero di questa Rivista, trattiamo delle successioni di riassunti esaustivi a fini preditivi (r.e.f.p.) ed affrontiamo i seguenti problemi:

1. assegnata una distribuzione predittiva per cui esiste un r.e.f.p. è possibile individuare un modello ipotetico con essa compatibile?
2. in caso affermativo, qual è il collegamento tra tale r.e.f.p. e gli eventuali r.e. in senso classico relativi al modello ipotetico individuato?

Infine analizzeremo, in modo piuttosto informale e perciò ulteriormente sviluppabile, il problema dell'espressione analitica di un r.e.f.p.     

Are happiness and productivity lower among young people with newly-divorced parents? An experimental and econometric approach

High rates of divorce in western society have prompted much research on the repercussions for well-being and the economy. Yet little is known about the important topic of whether parental divorce has deleterious consequences upon adult children. By combining experimental and econometric survey-based evidence, this study attempts to provide an answer. Under controlled conditions, it measures university students’ subjective well-being and productivity (in a standardized laboratory task). It finds no evidence that either of these is negatively associated with recent parental divorce. If anything, happiness and productivity appear to be slightly greater, particularly among males, if their parents have divorced. Using longitudinal data from the British Household Panel Survey—to control for so-called fixed effects—we then cross-check this result, and confirm the same finding, on various random samples of young British adults.     

Rethinking the relationship between local government and financial markets

In the past 20 years local governments have increasingly looked to financial markets for capital financing. The markets want local governments to change their accounting systems and become more transparent, in order to offer information that is more appropriate to private sector investors. The authors argue that this approach is only a partial solution, and that local government and financial institutions would both benefit from changes in their relationships. The article identifies a double knowledge gap that needs to be filled if the public and private sectors want to work together as long-term financial partners.     

The toll of traffic-related fatalities in a metropolitan Italian area through the experience of the Department of Legal Medicine

Despite the introduction of new traffic laws in Italy, traffic-related deaths are still a huge burden. The study presents data and medico-legal issues behind traffic deaths in Milan between 2001 and 2012 (1506 traffic-related deaths). Data were collected from the database of the Department of Legal Medicine: 79.4% males and 20.6% females (mean age 44.14). The target group concerned traumatic deaths as a consequence of the accident as well as deaths not directly related to an accident. Although 6.1% were non-traumatic deaths (cause of death unconnected to the accident, i.e. because of a heart attack, or when death occurred after survival and cause of death was not related certainly to the accident), multiple skeletal/visceral injuries were the main cause of death (57.9%), occurring in motorcyclists the most (63.7%). Injuries to the skull and brain were the second cause of death (25.9%). Victims were mostly males (79.4%) and drivers (77.6%). Fifty-five per cent were deaths on-scene, while 45% survived. Other variables were also considered: medications, medical history, and drugs/alcohol/smoke. A downward trend in traffic-related fatalities was evident, but the toll is still high. This study should be a glimpse at the actual situation, since it is indicative of a metropolitan area where autopsies are systematically performed.     

Trade and agroindustrialization in developing countries: trends and policy impacts

There have been important changes in the international trade of processed and high-value added food products from developing countries over the past several decades. One of them has been the emergence of oilseeds and fruits and vegetables, replacing traditional products such as sugar, coffee, and cocoa as the main exports from developing countries. Another trend has been the collapse of African agroindustrial exports and the increase of exports from Asia. The paper highlights key trends, and explores possible reasons for the trends, focusing on trade policies in less-developed countries (LDCs) and developed countries (DCs). The paper argues that national trade policies and other economic policies appear to have been relatively supportive of agroindustrial production and exports in Asia. In contrast, policies have had more mixed effects in Latin America and the Caribbean (LAC), and seem to have been just one component in a larger array of forces inhibiting economic development in Africa. The performance of agroindustrial production and exports from LDCs may be now more dependent than ever on the completion of reforms in the agricultural trade policies of DCs. For Africa, however, a more supportive international environment and better macroeconomic and trade policies will not be enough to ensure a thriving agroindustrial sector within a broader process of economic development until military confrontations stop.     

The role of self selection, usage uncertainty and learning in the demand for local telephone service

Telephone services are often characterized by the presence of ‘fixed’ plans, involving only a fixed monthly fee, as well as ‘measured’ plans, with both fixed fees and per-unit charges for usage. Consumers are faced with the decisions of which plan to choose and how much to use the phone and these decisions are not, in general, independent. Due to the presence of a time lag between plan choice and usage decisions, consumers are uncertain about usage at the plan-choice stage. We develop a structural discrete/continuous model of plan choice and usage decisions of consumers that accounts for such uncertainty. Prior research has also found that consumers switch less often from fixed plans to measured plans to gain from potential savings than vice versa. Consumer uncertainty regarding their mean usage levels and different rates of learning by consumers in the two plans is a potential explanation for this phenomenon. We extend our discrete/continuous model to account for consumer learning about their mean usage and estimate different rates of learning for the two types of plans. We estimate our model using data from the 1986 Kentucky local telephone tariff experiment. Even in the absence of any price variation over time, we are able to measure the price elasticities both of usage and of choice of plan. Using our parameter estimates, we simulate the effects of the introduction of a metered plan in a market with only a fixed plan and vice versa, on both firm revenues and consumer surplus. We also find that consumers learn very rapidly if they are on the measured plan but learn very slowly when they are on the fixed plan. We investigate an alternative assumption on the nature of the learning process in which only consumers in the measured plan have an opportunity to learn. We find that our empirical results are robust to this change of specification. We conduct counterfactual simulations to simulate enhanced calling plans from the firm and consumer points of view. Additional simulations to measure the value of information in this category are also carried out. We compute the value of both complete information, where the entire uncertainty about future usage is resolved, as well as that of limited information, where the consumer's uncertainty about mean usage is resolved, but the uncertainty about specific month-to-month usage remains. We find that the value of information is modest. We also find that a large proportion of the value of information is that about the mean usage, with the value of the information about a specific month's usage being relatively small.