Renewable resource market obeying difference equations: Stable points,stable cycles,and Chaos (1991)

In this paper, the basic principles of the Chaos Theory are applied to dynamic systems involving renewable resource and harvest. The results of simulations are presented regarding harvested resource stock time path. It is shown that stationary steady-state is only one of many different possible outcomes of bioeconomic equilibrium. The varying impacts that different management policies have on an unstable dynamic system are also studied. It is shown that in unstable resource systems, the effects of some policy measures will be very different from the ones obtained through traditional resource analysis. It also shows that policies which induce a stabilizing effect in stock time series will generally provide greater welfare gains. The results are illustrated by two market examples.     

Forward-premium puzzle: is it time to abandon the usual regression?

The forward premium puzzle is usually evidenced by the rejection of the null hypothesis in the uncovered interest parity (UIP) regression. Because this parity need only hold in a risk-neutral world, a risk adjustment term is missing from the equation if speculation in foreign exchange markets is risky. We deal with this issue following the literature which assumes that discounted returns on foreign government bonds are log-normal, so we can linearize the Euler pricing equations (in level) and obtain a modified UIP system for which the risk adjustment term is obtained by applying to the pricing kernel-based relations a generalized autoregressive conditional heteroscedasticity-in-mean model. However, here we innovate by adopting a methodology which differs from all these related works. We construct and use a stochastic discount factor that does not depend on a specific model, by residing in the space of returns which we extract from the data by simply imposing the orthogonality restrictions represented by the Euler equations. So, we devise a purely statistical pricing kernel that performs well in in-sample level equations. Somewhat disappointingly, the risk premium inclusion in the conventional regression changes neither the significance nor the magnitude of the forecasting power of the forward premium for most currencies we study. The contrasting performance of the tests in level and in logs suggests that linearization may be to blame.     

SOCIAL IDENTITY AND REDISTRIBUTIVE PREFERENCES: A SURVEY

Social identity has become accepted as a key concept underpinning the endogeneity of economic behaviour and preferences. It is important in explaining attitudes towards redistribution and pro‐social behaviour. We examine how economic theory measures social identity and its effects on preferences towards redistribution, social solidarity and redistributive institutions. Empirical evidence indicates that social identity carries weight in explaining the presence of social preferences and attitudes towards redistributive institutions.     

Internationalization choices and Italian firm performance during the crisis

We focus on the relationship between internationalization choices and performance of Italian firms during the first period of the financial crisis (2007–2010). Making use of a new firm-level database, we build a six-class taxonomy of firms’ internationalization activities; then we estimate firms’ performance as a function of internationalization forms, also estimating propensity score and Heckman selection models in order to control for endogeneity and sample selection bias. Over the period 2007–2010, Italian firms moved (on average) towards more complex forms of internationalization. Empirical analysis finds that these upward changes are related with positive effects on firms’ (labour) productivity, also in a period characterized by the 2009 trade collapse. These findings put additional emphasis on the issue of the diversification of both products and markets as a goal to be pursued by firms, even in times of crisis, to remain competitive and make profits.     

Cost of doing business index in Latin America

Quality & Quantity - The World Bank's Ease of Doing Business Index (EDBI) has been widely used in analyzes of attracting investments and formulating public policies. Despite its importance...     

Earnings management strategies in Brazil: Determinant costs and temporal sequence

This paper describes a study that analyses earnings management strategies involving accounting choices or real activities in Brazil. An analysis is conducted of the relationships between earnings management strategies their determinant costs and of the temporal sequence in which these management strategies are applied. The results of empirical tests indicate that adoption of management strategies is dependent on their relative costs. There is a temporal relationship between the two types of strategies for manipulation of year-end results, with real activities preceding accounting choices. It was also observed that the level of manipulation by accruals (real activities) reduced (increased) after adoption of the IFRS in Brazil.     

University–industry collaboration in Italy: A bibliometric examination

This work investigates public–private research collaboration between Italian universities and domestic industry, applying a bibliometric type of approach.The study is based on an exhaustive listing of all co-authored publications in international journals that are jointly realized by Italian university scientists and researchers in the private sector; this listing permits the development of a national mapping system for public–private collaboration that is unique for its extensive and representative character. It is shown that, in absolute terms, most collaborations occur in medicine and chemistry, while it is industrial and information engineering that shows the highest percentage of co-authored articles out of all articles in the field.In addition, the investigation empirically examines and tests several hypotheses concerning the qualitative–quantitative impact of collaboration on the scientific production of individual university researchers. The analyses demonstrate that university researchers who collaborate with those in the private sector show research performance that is superior to that of colleagues who are not involved in such collaboration. But the impact factor of journals publishing academic articles co-authored by industry is generally lower than that concerning co-authorships with other entities. Finally, a further specific elaboration also reveals that publications with public–private co-authorship do not show a level of multidisciplinarity that is significantly different from that of other publications.     

The disposition effect and investor experience

We examine whether investing experience can dampen the disposition effect, that is, the fact that investors seem to hold on to their losing stocks to a greater extent than they hold on to their winning stocks. To do so, we devise a computer program that simulates the stock market. We use the program in an experiment with two groups of subjects, namely experienced investors and undergraduate students (the inexperienced investors). As a control procedure, we consider random trade decisions made by robot subjects. We find that though both human subjects show the disposition effect, the more experienced investors are less affected.     

Health systems futures: The challenges of technology,prevention and insurance

This article argues that the futures of health systems depend on how countries address three wider challenges that include: (a) the adoption of health innovations and quality improvements, (b) responses to new non-communicable and preventable global diseases, as well as (c) adjusting financial models to current insurance constraints. Future trends point towards an increasing dependence on productive quality improvements, the personalisation of health care and the organisation of delivery and finance to take advantage of existing knowledge. Prevention, and disease avoidance, particularly that of non-communicable diseases, will aim to reduce pressure on “care components” of the health system whilst global control of communicable risks will become apparent. Finally, trends suggest an increase in patient participation and personalisation of insurance contracts will help to realign risk sharing with cost containment and financial sustainability. Other potential challenges such as ageing are regarded as second order issues to be addressed through these aforementioned future trends.