A cellular automata-based land-use model as an integrated spatial decision support system for urban planning in developing cities: The case of the Bogotá region

Bogotá and the 17 neighboring municipalities make up one of the biggest metropolitan areas in Latin America. However, despite strong functional interactions within the area, there is no official government body at this level in charge of coordinating authorities and providing solutions to the wide variety of issues arising in the regional urban land system. Aiming at providing an insight on future land-use developments linked to new transport infrastructures and at offering a tool to support territorial decision-making, this paper presents a cellular automata-based (CA) model based in Metronamica® software, that allows testing different scenarios based on potential land-use policies, environmental suitability and transport alternatives.There has not been, so far, an urban planning tool that accounts for the complexities of this region. CA-based land-use simulations constitute a useful approach to understanding the impacts of urban planning policies and regulations. This tool can help to improve inter-territorial and inter-institutional coordination, which through planning and management policies seek a spatially integrated development, with a long-term perspective.The CA-based model proposed was calibrated to reproduce land-use changes between 2007 and 2016 using different methods and indicators. The model was used to simulate and analyze eight scenarios with different policy directions of transport infrastructure in the future of the region. The results of the simulations reflect the dynamics of territorial occupation. The calibration indices in the experiment indicate a high degree of suitability for the CA Bogotá model, proving its effectiveness and potential as a useful tool for decision-making. The results show that occupation scenarios with restricted developable zones within the city, tend to have the greater dispersion rate in the study area, compared to scenarios where land development plans are promoted in Bogotá, which representing a more compact development.     

Impact of national policies on patterns of built-up development: an assessment over three decades

Globally, built-up development is taking place at unprecedented rates. To mitigate and limit its effects, recent scientific and spatial planning communities call for built-up management to be addressed on broader scales, from regional to national, and coordinated with multiple policy domains. In this paper, we aimed to analyze the evolution and impact of Romania’s national policies on built-up management during the entire period from the fall of the communist regime to the present. The new perspective offered by our study concerns the use of spatiotemporal built-up development assessment with policy analysis and visualization. Moreover, policies and built-up land changes are addressed in direct relationship with major political events and global economic influences. Our findings reveal that policies were influenced by the communist legacy, accession to the EU and the global economic crisis. Most effective were the policies adopted during the pre-EU accession period and after the economic crisis. The strongest impact on patterns of development came from policies in the domains of transportation, regional development, public administration and the environment.     

创新政策工具组合、创新能力与创新绩效研究

基于2008-2018年我国内地30个省市面板数据，采用面板固定效应模型分析创新政策工具及其交互项对创新能力及创新绩效的影响。结果发现：①供给型和环境型创新政策均有利于促进技术创新能力提升和创新数量增长，需求型创新政策对创新能力及创新绩效的影响均不显著；②需求型、环境型和供给型创新政策两两交互项能够显著提高基础创新能力和技术创新能力，并显著增加创新数量，但对创新质量均呈显著负向影响；③需求型与供给型以及需求型与环境型创新政策组合功能呈协同互补性特征，供给型和环境型创新政策组合功能呈竞争性特征；④基础创新能力在创新政策工具对创新质量的影响中发挥完全中介作用，技术创新能力在创新政策工具对创新数量的影响中发挥完全中介作用。     

中国省域科技特派员制度实施绩效评估

2016年5月《国务院办公厅关于深入推行科技特派员制度的若干意见》发布实施，但其实施效果如何有待验证。构建科技特派员制度实施绩效评估指标体系，利用改进熵值法和官方统计数据，对中国省域科技特派员制度实施绩效进行实证评估，并对评估结果进行聚类分析。结果表明，中国大多数省份科技特派员制度实施绩效水平较低；根据实施科技开发项目、形成利益共同体、服务农民情况、推广服务和扶贫成效5个绩效评估维度，可以将中国内地31个省份划分为5种类型；即使是总绩效水平较高的地区，在科技特派员制度实施绩效方面也存在一些短板。     

Substantial effect of voluntary policy interventions on aircraft ground handling safety

Managing safety and health matters require comprehensive policy intervention to change the existing culture in the ground handling operations and reducing the safety performance outcomes. This study aims to investigate the relationship between safety culture and safety performance outcome with voluntary policy intervention as the moderating effect of the relationship. The study employed a quantitative method through a survey instrument, which was participated by 423 ground handling workers from six international airports in Malaysia. The results indicated seven hypotheses in direct relationships have positive association between safety culture and safety performance construct. While for moderator relationships, there were five hypotheses found to be statistically significant and supported. The presence of voluntary policy interventions were found to be beneficial or detrimental elements for the insignificant relationships of the study. The ground handling organisation is expected to utilise these results by strengthening their organisation safety culture and prioritise safety and health matters over demand and cost.     

Effects of investor tax heterogeneity on stock prices and trading behaviour around the ex-dividend day: the case of Australia

Using a sample of Australian stocks during the 1996–2014 period, this study examines how tax heterogeneity between domestic and foreign investors affects trading behaviour and stock prices around the ex-dividend day. Domestic investors prefer dividends and tend to buy stocks cum-dividend and sell them ex-dividend whereas foreign investors tend to trade in the opposite direction. Abnormal trading turnover increases with tax heterogeneity. Moreover, stocks with a larger domestic investor base are associated with a higher price drop-off ratio on the ex-dividend day and higher market value of franking credits. Overall, our findings support the dynamic dividend clientele hypothesis.     

Price competition between green and non green products under corporate social responsible firm

This article deals with a newsvendor inventory model in light of green product marketing of corporate social responsible firms. In this model, comparison between green and non green marketing is analyzed including subsidy and tax implementation by Government where the Government offers higher subsidy and lower tax to the green producer unlike the lower subsidy and higher tax to the non green producer. There is also price contest between green and non green producer as the demands of the products are dependent on sales price, carbon emission and corporate social responsibility index. Assuming the cost and profit parameters, an expected profit function of the systems is formulated and maximized analytically. Finally, numerical examples are illustrated to justify the proposed model.     

Genetically modified organisms and the age of (Un) reason? A critical examination of the rhetoric in the GMO public policy debates in Ghana

Using narrative policy analysis we examined the adversarial rhetoric of claims-makers in their bid to undermine alternative and conflicting accounts of GMOs as environmental and human health risk and to forestall any challenges to the scientific authority of the technological deterministic account of the GMO policy debates in Ghana. The study shows that the GMO discourse was built with the rhetorical frames of smallholder farmer vulnerability and entitlement used in the account it contradicts, thereby legitimating its own appeal for responsive remedies. Civil society claims attacked GMOs as discriminatory and as an environmental and human health risk. Government and scientists engaged in unsympathetic counter rhetorical strategies in hopes of debunking or neutralizing the claim made by civil society. In other words, Government and scientists were denying the claim that GMO was discriminatory and posed significant human health risk, as well as the call to action to do something about GMOs. Civil society adapted the counter rhetoric of insincerity, claiming that scientists had some kind of “hidden agenda” behind their claim, such as eagerness to just earn money from their patents on GMOs. It is imperative that communication on GMOs includes the underlying assumptions, the uncertainties and the probabilities associated with both best and worst case scenarios. This is a necessary condition to minimise misinformation on GMOs but may be insufficient to completely erase conspiracy theories from the minds of the public especially when scientists and government are perceived to be biased towards multinational corporations that are ostensibly preoccupied with making profits.     

Liquidity risk and policy options

On the basis of a liquidity management model, liquidity risks, defined as the probability of payment failures in a real-time gross settlement (RTGS) payment system, may either stem from liquidity management inefficiencies or insufficient cash balances. I will show that penalties charged on the amount of payment failures minimise liquidity risks without interfering with the bank’s technology preferences. I will instead show that liquidity requirements, although as effective as penalties to contain the risk of liquidity shortage, may distort the bank’s technology preferences and cannot stem liquidity management inefficiencies. I will also show that liquidity risks within RTGS payment systems are potentially smaller because they depend more on the liquidity management efficiency than on the randomness of cash inflows and outflows.