Agent based model of a simple economy

This article proposes a model of a simple economy based on a set of agent-based modeling principles. The model is based on the ??trust game?? formulated by Berg et?al. (Games Econ Behav 10:122?C142, 1995), and anticipates a random matching of partners taking in to account adaptive agent behavior. Simulation in the NetLogo programming environment, using profile distributions obtained from empirical studies, has shown the most successful agents to posses low parameters of trust in the role of Sender and high parameters of trustworthiness in the role of Receiver.     

Disclosure Strategies for Pollution Control

Disclosure strategies, which involve public and/or private attempts to increase the availability of information on pollution, form the basis for what some have called the third wave in pollution control policy (after legal regulation – the first wave – and market-based instruments – the second wave). While these strategies have become common in natural resource settings (forest certification and organic farming, for example), they are less familiar in a pollution control context. Yet the number of applications in that context is now growing in both OECD and developing countries. This survey will review what we know and don’t know about the use of disclosure strategies to control pollution and conclude with the author's sense of where further research would be particularly helpful.     

Training Agreements: Resolving Under-Investment in Training?

Here the authors examine UK employers’ use of training agreements and their impact on training and development practice. In particular, they review the literature on training agreements and find this to be underdeveloped and based upon little empirical data. Drawing on postal survey and focus group evidence from management trainees and an interview survey of employers, they show that training agreements are relatively widespread, and that employers mainly use agreements as a filter mechanism to assess an employee’s commitment to the training requested. The evidence suggests that training agreements do little to improve, and may negatively effect, a trainee’s commitment to the employer.     

Endogenous housing market cycles

Housing markets tend to display positive serial correlation as well as considerable volatility over time. We present a heterogeneous agent model illustrating the connection between adaptive expectations and housing market fluctuations. A dwelling serves as a shelter, as a vehicle for investment and as mortgage collateral. Interesting dynamics arise as the valuation of these three properties changes over time through the interaction of buyers, sellers and mortgagees. In the absence of credit constraints imposed by mortgagees, house prices oscillate mildly around the equilibrium price. However, credit constraints imposed by mortgagees can affect market dynamics quite dramatically with periods of mild oscillations interrupted by violent collapses. This chaotic behavior arises even though buyers, sellers and mortgagees agree on market forecasts.     

Silence as a survival strategy: will the silent be worse off? A study of Chinese migrant workers in Guangdong

Abstract

Based on a comprehensive survey of 766 migrant workers in Guangdong province in 2014, this study empirically examines the factors determining why some Chinese migrant workers remain silent when their rights are violated and the consequences of them doing so. The results of the survey show that the migrant workers who are more vulnerable in demographic factors, family dependency, job insecurity and social networks are more likely to stay silent in such circumstances. The results further indicate that silence leads them to be worse off in relation to social security benefits and labour rights. These results challenge the traditional organisational behaviour perspective on silence. The results imply that silence can be a survival strategy for second-class workers and may be evident whereby the disadvantaged have no say and remain silent in exchange for work opportunity, but by doing so are more likely to suffer unfair treatment.     

Budgeting and portfolio allocation for biosecurity measures

This paper presents a practical model for optimally allocating a budget across different biosecurity threats and measures (e.g. prevention or border quarantine, active surveillance for early detection, and containment and eradication measures) to ensure the highest rate of return. Our portfolio model differs from the common principle, which ranks alternative projects by their benefit cost ratios and picks the one that generates the highest average benefit cost ratio. The model we propose, instead, aims to allocate shares of the budget to the species where it is most cost‐effective, and consequently determine the optimal scale of the control program for each threat under varying budget constraints. The cost‐effectiveness of each block of budget spent on a threat is determined by minimising its expected total cost, including the damages it inflicts, and the control expenditures incurred in preventing or mitigating damages. As an illustration, the model is applied to the optimal allocation of a budget across four of Australia's most dangerous pests and diseases: red imported fire ants; foot‐and‐mouth disease; papaya fruit fly; and orange hawkweed. The model can readily be extended to consider more species and activities, and more complex settings including cases where detailed spatial and temporal information needs to be considered.     

COVID-19 and the power of indigenous,Mexican-origin farmworker families in the US Pacific Northwest

Over the last several years—in the context of US political upheaval, ongoing crises related to climate change, the COVID-19 pandemic and an economic downturn—indigenous, Mexican-origin farmworker families in Washington State have engaged more intensely in class struggle through acts of solidarity and forms of collective action, in part through independent labour unions, worker cooperatives and mutual aid. This article chronicles the labour struggles that led to a notion of class rooted in family units of production and that strengthened transnational solidarity in resistance to racist forms of exploitation in the agricultural sector. Class organization rooted in family and solidarity has allowed indigenous agricultural workers in Washington State to face COVID-19 and incidents driven by climate change, which syndemically compounded existing community health crises, from a place of power. Focusing on the experience of farmworker families in Washington State, I outline agricultural employers' exploitation of workers during this period of increased vulnerability and the strength of farmworkers' resolve to take their health and well-being into their own hands.     

Adaptation of the Attitude Behavioural Scale section of a PATT instrument for the Omani context

International Journal of Technology and Design Education - This study is about the adaptation of the Attitude Behavioural Scale (ABS) section of a Pupils’ Attitudes Towards Technology (PATT)...