城市绿地用途管制问题与制度建设研究——以青岛市为例

针对城市绿化面临的问题及其在生态中国建设中应有的担当地位,以青岛市为例,论证了运用用途管制制度规划建设管理城市绿化的必要性、可行性以及通过立法供给落实城市绿化用途管制制度的路径,认为绿化分类是实施用途管制的基础,绿地系统规划是实施用途管制的依据,转用审批是实施用途管制的关键,绿地利用效益评估是实施用途管制的保证,执法监督是实施用途管制的保障。同时建立多重激励保障机制,形成良好的实施用途管制制度的社会氛围。     

Airbus versus Boeing revisited: international competition in the aircraft market

This paper examines international competition in the commercial aircraft industry. We estimate a discrete choice, differentiated products demand system for wide-body aircraft and examine the Airbus-Boeing rivalry under various assumptions on firm conduct. We then use this structure to evaluate two trade disputes between the United States and European Union. Our results suggest that aircraft prices increased by about 3.7% after the 1992 US-EU agreement on trade in civil aircraft that limits subsidies. This price hike is consistent with a 5% increase in firms' marginal costs after the subsidy cuts. We also simulate the impact of the future entry of the Airbus A-380 super-jumbo aircraft on the demand for other wide-bodied aircraft, notably the Boeing 747. We find that the A-380 could reduce the market share of the 747 by up to 14.8 percentage points in the long-range wide-body market segment (depending upon the discounts offered on the A-380), but would reduce the market for Airbus's existing wide-bodies by an even greater margin.     

Lewis and Clark and the Corps of Discovery: Re‐enactment Event Tourism as Authentic Heritage Travel

Abstract

Heritage tourism has evolved to include study of sub‐segments who travel to attend and participate in historical event re‐enactments. In the US, the bicentennial of the Lewis and Clark expedition to the Pacific coast and back again is being commemorated from its point of departure to its end. This paper is an exploratory study of a sample of re‐enactment tourists who attended three of the Lewis and Clark events. The role that re‐enactment tourism plays in heritage tourism is examined and preliminary findings on perceptions of nostalgia and authenticity of the re‐enactment products and events are presented. Preliminary managerial benefits and suggestions for host communities are provided.     

Motivating innovation in newly public firms

Prior research suggests that executive option grants that do not quickly vest provide managers with better incentives to pursue long-term, instead of short-term, objectives. Previous research also suggests that the pursuit of long-term objectives could be undermined by the risk of early termination. We conjecture that these arguments jointly suggest that managers are better motivated to pursue innovation when they are given more incentive compensation with longer vesting periods for unexercised options and yet some protection from disruptive takeover threats. Our evidence for a sample of newly public firms is consistent with more innovative firms jointly choosing such a combination.     

A combination of differentiation and consolidation theory and risk-benefit analysis to examine decisions on mastitis prevention

Abstract

Mastitis infections cause severe pain in dairy cows and are the most costly illness to farmers. This study combined differentiation and consolidation (Diff-Con) theory with risk-benefit analysis to explore how risky decisions are perceived and justified after a decision has been taken. More specifically, using survey data from 428 Swedish dairy farmers, their decisions about adopting preventive measures to control mastitis (mastitis control options, MCO) in dairy herds were examined. The analyses included group comparisons with non-parametric rank tests and use of both ordinary least squared regression and seemingly unrelated regression analysis to examine how prior adoption of MCO affects farmers’ attitudes to the MCO. The results showed that MCOs already adopted were rated higher in perceived riskiness (if not implemented) and in expected benefit (for illness prevention) than non-adopted MCOs. Having made the decision to implement a strategy increased the likelihood of that decision being perceived as more beneficial (reducing mastitis) and risky (in terms of disease increase if not implemented), irrespective of the combination of strategies used on the farm, during the post-consolidation stage. No difference in perceived illness prevalence could explain the farmers’ rating of the MCOs. These findings suggest that there may be a path dependency in farmers’ decision-making with respect to MCO. This implies that novel MCOs may have difficulty in achieving wider implementation. These results have implications for the development of strategies to communicate best practices for use of MCOs and for new research on MCOs and farmers’ decision-making.     

Socially Responsible Investing and Climate Change: Contradictions and Challenges

This article explores the contradiction between the articulated investment policies, screening criteria or ethical charters of socially responsible investment funds and their actions demonstrated by their portfolio selection practice. The paper provides a background to socially responsible investment and Australia's contribution to greenhouse gas emissions. A discussion of renewable energy options lays the foundation for our main assertion: that this set of possible alternatives provides some new and more environmentally robust options that will better complement the underlying philosophy of funds in the socially responsible investment sector.     

现代城市广场优化设计研究

本文在总结中外广场发展规律的基础上,借助于环境工程学、心理学、城市社会学、建筑学、美学、艺术 等诸多学科的成就,着重研究人在广场空间环境中的行为活动规律,进而对广场空间环境设计进行了系统分析和提出了优化设计应遵循的原则。