Exposure to pesticides, ill-health and averting behaviour: Costs and determining the relationships

Farmers\' exposure to pesticides is high in developing countries. As a result they suffer from ill-health, both short and long term. Deaths are not uncommon. The paper examines the cause of this high exposure by estimating farmers’ expenditure on precautions taken using the avertive behaviour approach. The data show that the expenditures on defensive behaviour are low. The paper then uses tobit regression analysis to determine factors that influence defensive behaviour. The results are useful, not only for Sri Lanka, but for many countries in South Asia, Africa and Latin America in reducing the current high levels of direct exposure to pesticides among farmers and farm workers using hand sprayers. Farmers\' exposure to pesticides is a major occupational health hazard in these countries.Exposure to pesticides, ill-health, defensive behaviour, influencing factors, developing countries

Individual strategies of aggressive and non-aggressive male mice in encounters with trained aggressive residents

To determine whether individual differences in offensive behaviour are related to differences in defensive behaviour, the responses of male wild house mice, Mus domesticus, of an aggressive and a non-aggressive line to defeat by physically stronger residents were analysed. Individuals of the aggressive line engaged in more flight behaviour, whereas the males of the non-aggressive line predominantly showed immobility. The higher flight tendency of the aggressive intruders provoked more attacks by the resident, resulting in more fighting between the resident and an aggressive male than between the resident and a non-aggressive intruder. However, if offered an opportunity to escape from the home-cage of the resident, aggressive males more readily made use of it than non-aggressive intruders. Differences between aggressive and non-aggressive male mice are interpreted in terms of fundamentally different behavioural strategies adopted in response to social interaction. The response of aggressive males can be characterized as an active behavioural strategy by which they tend to determine actively their social situation. In contrast, the prevailing lack of overt attempts to manipulate the situation by the non-aggressive mice points to passive confrontation, in an offensive as well as in a defensive context.

Does defensive medicine change the behaviors of vascular surgeons? a qualitative review

Although in literature few successful claims have been shown in comparison with other medical specialties such as gynaecology and orthopaedics, vascular surgery is included among high-risk specialties. The high-risk of receiving medical claims may lead vascular surgeons to practice defensive medicine, as is normal in several other areas of clinical practice. No studies are available to our knowledge of the incidence of defensive medicine in the field of vascular surgery. Taking into consideration the scarce amount of information, the authors provide a critical discussion regarding the application of defensive medicine behaviour among vascular surgeon

A WTP Model Showing the Relationships Between Three Approaches For Pollution

In this paper, a simple willingness to pay (WTP) model that shows the theoretical relationships among three valuation approaches that can be used to measure changes in health resulting from pollution is developed. The three valuation approaches considered are the contingent valuation (CV), cost of illness (COI) and the defensive behaviour approaches. After showing the relationships between the three valuation approaches, the model demonstrates that the CV approach exceeds the COI and the defensive behaviour approaches. The theoretical results are supported by field survey data. The pollution referred to in this paper is direct exposure to pesticides by farmers during handling and spraying on their farms.

A WTP model showing the relationships between three approaches for pollution

In this paper, a simple willingness to pay (WTP) model that shows the theoretical relationships among three valuation approaches that can be used to measure changes in health resulting from pollution is developed. The three valuation approaches considered are the contingent valuation (CV), cost of illness (COI) and the defensive behaviour approaches. After showing the relationships between the three valuation approaches, the model demonstrates that the CV approach exceeds the COI and the defensive behaviour approaches. The theoretical results are supported by field survey data. The pollution referred to in this paper is direct exposure to pesticides by farmers during handling and spraying on their farms

Size-correlated division of labour and spatial distribution of workers in the driver ant, Dorylus molestus

Driver ants ( Dorylus spp.) show a high degree of worker polymorphism. Previous reports suggest that large Dorylus workers are specialised for defensive tasks. In this study, we first quantitatively tested whether there is a size-correlated division of defensive labour among workers. Second, we determined whether the spatial distribution of workers outside the nest can be predicted based on such size-specific differences in task allocation. We show that the division of defensive behaviour among different-sized workers is not strict. However, there is a significant correlation between worker size and the tendency to carry out defensive tasks. First, workers of larger size were more likely than smaller workers to participate in colony defence. Second, larger workers were more frequent near the nest containing the reproducing individuals and the brood. Finally, large workers were more common in open sections of the trail than in covered sections, which are likely to be less exposed to predators

Gender Differences in Technical-Tactical Behaviour of la Liga Spanish Football Teams

[Abstract] The aim of this study was to identify differences in technical-tactical behaviour between the men and women first division football teams of the Spanish league, to this end 68 matches corresponding to 2016/17 season were analysed. A comparative analysis of the medians was carried out using the Mann-Whitney U-tests were conducted as post hoc tests. The size effect of this test was calculated and, finally, we performed a grouping of the variables through the clustering bootstrapping technique in both groups. We have detected statistically significant differences (p <0.01) regarding all accurate passes, in favour of men, as well as a greater number of yellow cards. In female football, a greater number of picking up free balls, interceptions, lost balls, recoveries and challenges are produced. Finally, in women's football a greater number of attacks are also carried out, both positional and counterattacks than in men. The clustering analysis allowed us to identify that in male football, the circumstance of receiving a red card is closely related to the number of goals conceded and most of the shots on goal are achieved by positional attacks. In the case of women's football, ball possession on own half is closely related to the number of losses. Data proves the existence of technicaltactical differences between male and female football of the La Liga teams. Such detailed analysis could be useful for gender-specific training information for optimal preparation. However, more research is warranted to establish the main gender differences and characterize women's football.We gratefully acknowledge the support of Generalitat Valenciana proyect: Análisis observacional de la acción de juego en el fútbol de élite (Consellería d´Educació, Investigació, Cultura i Esport) during the period: 2017-2019 (GV2017/044). We also acknowledge the support of Universidad Católica de Valencia “San Vicente Mártir” project: Estudios en el deporte de élite desde los Mixed Methods: técnicas de análisis de estudios comparativos, during the period 2018 [Grant UCV2017/230-002]Generalitat Valenciana; GV2017/044Universidad Católica de Valencia; UCV2017/230-00

Strategic Behaviour and Risk Taking in Football

This article develops a dynamic game-theoretic model of optimizing strategic behaviour by football teams. Teams choose continuously between defensive and attacking formations and between a non-violent and a violent playing style. Starting from the end of the match and working backwards, the teams' optimal strategies conditional on the current state of the match are determined by solving a series of two-person non-cooperative subgames. Numerical simulations are used to explore the sensitivity of strategic behaviour to variations in the structural parameters. The model is tested empirically, using English football league data. Teams that are trailing are willing to bear an increased risk of a player dismissal in order to increase the probability of scoring. Teams that are leading or level in scores play cautiously. The scoring rates of teams that are trailing are higher than those of teams that are ahead or level. Stochastic simulations are used to obtain probabilities for match results, conditional upon the state of the match at any stage. The article's main theoretical and empirical results constitute novel, non-experimental evidence that the strategic behaviour of football teams can be rationalized in accordance with game-theoretic principles of optimizing strategic behaviour by agents when payoffs are uncertain and interdependent.