Mobile Money and School Participation: Evidence from Africa

This paper shows that mobile money technology—an electronic wallet service that allows users to deposit, transfer, and receive money using their mobile phones—is positively correlated with increased school participation of children in school age. By using data from 4 African countries, we argue that, by reducing transaction costs, and by making it easier and less expensive to receive remittances, mobile money reduces the need for coping strategies that are detrimental to child development, such as withdrawing children from school and sending them to work. We find that mobile money increases the chances of children attending school. This finding is robust to different empirical models. In a nutshell, our results show that 1 million children could start attending school in low-income countries if mobile money was available to all.

     

Physical activity is inversely related to drug consumption in elderly patients with cardiovascular events

Elderly patients with cardiovascular events are characterized by high drug consumptions. Whether high drug consumptions are related to physical activity is not known. In order to examine whether physical activity is related to drug consumption in the elderly, patients older than 65 years (n?=?250) with a recent cardiovascular event were studied. Physical activity was analyzed according to the Physical Activity Scale for the Elderly (PASE) score and related to drug consumption. PASE score was 72.4?±?45.0 and drug consumption was 8.3?±?2.2. Elderly patients with greater comorbidity took more drugs (8.7?±?2.1) and are less active (PASE?=?64.4?±?50.6) than patients with Cumulative Illness Rating Scale severity score higher than 1.8 than those with a score lower than 1.8 (76.3?±?41.4, p?<?0.05, and 8.0?±?2.0, p?=?0.006, respectively). Multivariate analysis correlation confirmed that PASE score is negatively associated with drug consumption (β?=??0.149, p?=?0.031), independently of several variables including comorbidity. Thus, physical activity is inversely related to drug consumption in elderly patients with cardiovascular events. This inverse relationship may be attributable to the high degree of comorbidity observed in elderly patients in whom poor level of physical activity and high drug consumption are predominant.     

Semi-parametric forecasts of the implied volatility surface using regression trees

We present a new semi-parametric model for the prediction of implied volatility surfaces that can be estimated using machine learning algorithms. Given a reasonable starting model, a boosting algorithm based on regression trees sequentially minimizes generalized residuals computed as differences between observed and estimated implied volatilities. To overcome the poor predictive power of existing models, we include a grid in the region of interest, and implement a cross-validation strategy to find an optimal stopping value for the boosting procedure. Back testing the out-of-sample performance on a large data set of implied volatilities from S&P 500 options, we provide empirical evidence of the strong predictive power of our model.     

Practical implications of higher moments in risk management

In this paper the out-of-sample prediction of Value-at-Risk by means of models accounting for higher moments is studied. We consider models differing in terms of skewness and kurtosis and, in particular, the GARCHDSK model, which allows for constant and dynamic skewness and kurtosis. The issue of VaR prediction performance is approached first from a purely statistical viewpoint, studying the properties concerning correct coverage rates and independence of VaR violations. Then, financial implications of different VaR models, in terms of market risk capital requirements, as defined by the Basel Accord, are considered. Our results, based on the analysis of eight international stock indexes, highlight the presence of conditional skewness and kurtosis, in some case time-varying, and point out that asymmetry plays a significant role in risk management.     

The demand for job protection: Some clues from behavioural economics

Radical differences in labour market regulations among countries that in other institutional respects are quite similar are still surprisingly frequent. Nonetheless, traditional theoretical analysis meets enormous difficulties in explaining these differences. The scope of our paper is to show that some clues from behavioural economics could be used to better theoretically treat this problem. Our argument is that workers are different, due to the effects of both culture and education. In particular, building on empirical evidence, we argue that loss aversion and hedonic adaptation are culturally-determined and country-specific aptitudes and that they may help explaining why workers, either employed or unemployed, ask for job protection and are willing to pay the cost of it. The main conclusion of our analysis is that, for poorly educated workers sharing a fatalist view of life, job protection can be more effective than public social expenditure. As a consequence, we suggest that countries with a poorly educated and fatalist workforce will be more prone to offer protection through job protection rather than public social expenditure, which is exactly what the empirical evidence shows.     

Deliberative democracy in the real world,the contribution of the capability approach

ABSTRACT

Drawing on Amartya Sen’s writings, this article presents the capability approach to democracy and shows its relevance for the sociological reflection and research on democratic processes conceived as ways to convert individual preferences into collective norms or decisions. Two moments are key in this respect: the formation of individual preferences and their translation into collective norms in the course of public debates. The initial sections present Sen’s conception of democracy, particularly emphasizing its articulation with the notions of ‘positional objectivity’ and ‘conversion’. Then, this conception is compared with two other mechanisms that may be used to coordinate individual decisions or preferences, namely the market and idealistic views on deliberative democracy. The article emphasizes how the capability approach departs from these two conceptions with regard to the two key concepts of capacity to aspire and capability for voice. The final section shows how Sen’s notion of democracy may open up a new field for research, namely the sociological investigation of the informational (or knowledge) basis of democracy.     

Hong Kong managers' perceptions of American business values

This report describes empirical research conducted to study the research question, “To what extent do foreign managers' own cultural values influence their perceptions of the corporate values of companies in other cultures?” Using the authors' “Business Values Questionnaire,” business managers from Hong Kong gave their perceptions of publicly stated corporate values of very large U.S. service companies. A similar United States sample was used as a comparison group. Results gave partial support to the authors' hypotheses that an individual's own cultural values influence perceived values of another culture.     

Ranking opportunity sets in the space of functionings

We develop a ranking of compact, convex and comprehensive opportunity sets defined in the evaluative space of individual functionings. We suppose the existence of a target, that is a multi-dimensional bliss point in terms of functionings. This leads us to define concepts such as essentiality and freedomin a novel way. As a main result, we give an axiomatic characterization of the ranking obtained by minimizing the Euclidean distance between each opportunity set and the target.     

Pan-European groupings: A case study in paint manufacture

This complete Case Study, including Teaching Notes, won the 1991 EFMD Case Writing Competition Prize on a European theme, as well as receiving much praise from the judges. The Case concerns a group of four different European paint manufacturers co-operating in an EC Economic Interest Grouping to improve their economic position in European markets. The co-ordination of raw material purchasing policies was the first area of joint action; they obtained significant discounts straight away. Then they could begin to think about competing together against the big paint multinationals established in Europe. Later, talks started on joint investment and technology transfer.Lluis Renart and Francesco Parés have written a stimulating Case Study with Teaching Notes of value to business students and managers wishing to test out their analytical abilities.