复合枢纽机场工作区规划解析——以白云国际机场南工作区为例

机场工作区是保障机场正常运作的必不可少的功能区域,以广州白云国际机场南工作区为例探讨复合枢纽机场工作区的功能分区、建筑布局、道路交通组织以及景观形象规划,以期为未来其他各地机场工作区规划提供参考。     

Buyer information and the hedonic: The impact of a seller disclosure on the implicit price for airport noise

Revealed preference methods like the hedonic model generally assume economic agents have access to publicly available information and use it effectively. In the housing market, the recent proliferation of seller disclosure laws suggests that policymakers perceive buyers to be less than “fully informed,” presumably since they face higher information acquisition costs than sellers. The introduction of an airport noise disclosure in the residential housing market surrounding the Raleigh–Durham International Airport is used as a quasi-random experiment to analyze the impact of this type of information asymmetry between buyers and sellers on housing prices. The results from a regression analysis that controls for potential spatial and temporal confounders, suggest that the airport noise disclosure reduced the value of houses most heavily impacted by airport noise by 2.9 percent. This represents approximately a 37 percentage point increase in the implicit price of airport noise. The results provide evidence that publicly available information, such as that available for airport noise, may not be adequately considered by all buyers. They also suggest that the information environment should be carefully considered when using housing data and the hedonic model to value urban amenities and disamenities.     

New evidence on the efficiency of Italian airports: A bootstrapped DEA analysis

A bootstrapped DEA procedure is used to estimate technical efficiency of 18 Italian airports during the period 2000-2004. Departing from previous studies, we separate the efficiency related to ability to manage airside activities (operational) from that related to the management of all business activities (financial). In general, Italian airports operate at poor levels of efficiency, with slightly better performance in terms of their financial activities. In the current study, selected intrinsic and environmental characteristics are considered as possible drivers of Italian airport performance. In particular, we found that: (i) the airport dimension does not allows for operational efficiency advantages, (ii) on the other hand, the airport dimension allows for financial efficiency advantages for the case of hubs and disadvantages for the case of the smallest airports (iii) the type(s) of concession agreement(s) might be considered as important source of technical efficiency differentials for those airports running marginal commercial activities; (iv) the introduction of a dual-till price cap regulation might create incentives which lead to the increase of financial efficiency at the detriment of the operational performance. Lastly, the development of a second hub (Milano Malpensa), has negatively affected the performance of the country’s national hub (Roma Fiumicino).     

A general-equilibrium analysis of airport pricing,capacity, and regulation

Using a general-equilibrium model that includes consumers, airlines, and an airport with both aeronautical services and non-aeronautical services, this study investigates the airport's decisions on its aeronautical charge and capacity, as well as the size of its non-aeronautical services. In contrast to the existing literature, we formally model an airport's non-aeronautical services by taking into account the endogenous determination of the size of the airport's non-aeronautical services. First, we characterize the results for welfare maximization, and find that the self-financing property does not hold. Apart from carriers’ market power as a source of the failure for the self-financing property, we identify the presence of non-aeronautical services as a new source. Further, we show that the common practice of cross-subsidizing from the non-aeronautical to aeronautical services is incompatible with welfare maximization because welfare maximization requires exact self-financing within the non-aeronautical sector. Second, we derive the results for profit maximization by a monopolistic airport, and demonstrate that the imposition of two taxes, one on the airport's aeronautical services and the other on its capacity investment, can recover the welfare-maximization results. Third, we analyze the two types of regulation, single till and dual till, which are often used in practice, and show that dual-till regulation yields higher welfare than single-till regulation, as long as the profit from non-aeronautical services is positive. This result is in contrast to the prevailing wisdom in the literature, which in general favors single-till regulation.     

Copycat gaming: A spatial analysis of state lottery structure

In models of tax competition, tax instruments are explicit; all parties are aware of the tax and respond to incentives provided therein. In the case of state lotteries, the tax is the amount of sales collected but not redistributed as prizes. Using data from 1967 to 2000, we show that although such a tax is implicit, states still engage in tax competition; if neighboring states raise their prize payout by 10% (thereby lowering their lottery tax), the home state will respond with up to a 5% increase in their prize payout.     

A stochastic frontier analysis to estimate the relative efficiency of Spanish airports

There exists a common belief among researchers and regional policy makers that the actual central system of Aeropuertos Españoles y Navegación Aérea (AENA) should be changed to one more decentralized where airport managers could have more autonomy. The main objective of this article is to evaluate the efficiency of the Spanish airports using Markov chain Monte Carlo (MCMC) simulation to estimate a stochastic frontier analysis (SFA) model. Our results show the existence of a significant level of inefficiency in airport operations. Additionally, we provide efficient marginal cost estimates for each airport which also cast some doubts about the current pricing practices.     

论城市改造的谨慎更新理论与实践——以柏林为例

城市改造是城市研究与实践中一个极具争议性的论题。本文以德国首都柏林市的城市改造为例,梳理、分析了"谨慎更新"理念形成的脉络及其实践含义,着重考察了从大拆大建向谨慎更新转变过程中所蕴含的有关城市发展理念和政治经济格局等多重因素的相互作用,以期对我国的城市改造有所启示。     

On-the-job search and cyclical unemployment: Crowding out vs. vacancy effects

Incorporating on-the-job search (OTJS) into a real business cycle model has been shown to increase the cyclical volatility of unemployment. Using a particularly simple model of OTJS, we show that the increased search of employed workers during expansions induces firms to open more vacancies, but also crowds out unemployed workers in the job search, resulting in an ambiguous overall effect on unemployment volatility. We show analytically and numerically that the difference between the employer׳s share of the match surplus with an employed versus an unemployed job seeker determines the degree to which OTJS increases unemployment volatility. We use this result to re-consider some related papers of OTJS and explain the amplification of volatility they obtain. Finally, we show that a plausible calibration of the OTJS model allows us to reproduce most significant features of the US labor data.     

STATED PREFERENCES FOR PUBLIC SERVICES: A CLASSIFICATION AND SURVEY OF APPROACHES

The wider range of stated preference approaches to value public goods has not been systematically reviewed in recent years. The objective of this paper is to provide an overview of this literature and to evaluate the strengths and limitations of alternative approaches. Since the public referendum has served as a ‘blueprint’ for survey design, two key dimensions by which many surveys differ from the public referendum are used for a simple classification of approaches. This yields eleven approaches, including different variants of micro-based demand surveys, referendum surveys, budget allocation surveys and contingent valuation surveys. Their evaluation in terms of the preference information they produce and the assumptions they require suggests there is no single preferred approach. Instead, each approach has its characteristic profile of strengths and limitations which follow from how it strikes the balance between the conflicting goals of measuring entire willingness-to-pay distributions and presenting manageable, credible and incentive compatible questions. Ultimately, judgments about the suitability of alternative approaches for specific objectives should rely on empirical evidence. Progress in the field could greatly benefit from a routine implementation of powerful experimental validity tests in applied work.     

Cournot vs. Walras: A reappraisal through simulations

Best-reply behavior in Cournot oligopolies generally leads to Cournot-Nash equilibrium, but imitative behavior selects the Walrasian equilibrium as the unique stochastically stable state. Previous work (Alós-Ferrer, 2004) showed that in the presence of memory, imitative behavior leads to a non-trivial dynamics selecting all quantities between the Cournot and Walrasian outcomes. However, the scope of previous results was limited to specific assumptions on demand and cost functions, and did not provide information on the shape of the distribution of outcomes. We use computational simulations to address these limitations. We show that the selection result for non-trivial memory holds beyond the set of well-behaved Cournot games previously analyzed. Further, we find that, in Cournot games, the limit distribution of long-run outcomes is highly skewed towards the Walrasian quantity. Although longer memory increases the importance of the Cournot equilibrium, the competitive outcome remains the dominant prediction.     

Mieszkowski and Saper's estimate of the effects of airport noise on property values: A comment

This comment demonstrates that Mieszkowski and Saper, in their article recently published in this journal, overestimated the social cost of noise at Toronto airport because they misinterpreted noise contour data. A substantially lower reestimate is provided. Furthermore, their approach to the policy problem of whether to expand the existing Toronto airport or to build a second one is static. A dynamic analysis of the problem supports their skepticism about the justification for a second Toronto airport.     

路劲与顺驰:整合之痛

虽然当下开发商的资金紧张给实力地产企业并购其他"弱势房企"增加了机会,但企业之间的并购绝非"大鱼吃小鱼"那么简单。整合一些管理制度存在缺陷的企业,究竟是机会还是陷阱,现在还很难判断     

Globalization vs. Europeanization: A Business Cycles Race*

This paper examines the relative cyclical affiliation in six industrialized economies. While the broad conclusions are consistent with the existing literature, the proposed empirical framework is not based on correlations and permits the analysis of relative groupwise synchronization under very few assumptions. The results allow us to conclude that an English‐speaking club (Canada, UK, USA) is emerging in the last decades, whereas explicit and formal commitments seem to have had a relatively weaker power in determining Euro‐zone (France, Germany, Italy) business cycle comovements. Altogether, the business cycle race is a cause for concern as regards the entry of the UK into the Euro‐zone.     

A Statistical analysis of spatial point patterns A case study

In the project "statistical image analysis" of CWI we have studied some spatial point patterns that originated from biological observations. These observations were the positions of so called EGF-receptors on the surface of human carcinoma cells.
We propose a stochastic model for these point patterns. Since the EGF-receptors appear in clusters on the cell surface, we have opted for the Poisson-cluster-process as the model. We estimated the three parameters in this process by means of a method described by Diggle. We also did some work in assessing the statistical reliability of our estimates.     

Choice model specification,substitution and spatial structure effects: A simulation experiment

Several choice models are compared on their ability to reproduce two types of simulated data sets. The sets belonging to the first type were generated by using a probit model which is able to account for substitution effects while the data sets of the second type were generated by using a probit model which is able to account for spatial structure effects. The main conclusion of the experiment is that simple models like the multinomial logit model, although they perform less than the models used to generate the data, are sufficiently robust to reproduce the simulated data.     

Estimation for spatial dynamic panel data with fixed effects: The case of spatial cointegration

Yu et al. (2008) establish asymptotic properties of quasi-maximum likelihood estimators for a stable spatial dynamic panel model with fixed effects when both the number of individuals n and the number of time periods T are large. This paper investigates unstable cases where there are unit roots generated by temporal and spatial correlations. We focus on the spatial cointegration model where some eigenvalues of the data generating process are equal to 1 and the outcomes of spatial units are cointegrated as in a vector autoregressive system. The asymptotics of the QML estimators are developed by reparameterization, and bias correction for the estimators is proposed. We also consider the 2SLS and GMM estimations when T could be small.     

The socio-economic determinants of COVID-19: A spatial analysis of German county level data

The study explores the association of socioeconomic, demographic, and health-related variables at the regional level with COVID-19 related cases and deaths in Germany during the so-called first wave through mid-June 2020. Multivariate spatial models include the 401 counties in Germany to account for regional interrelations and possible spillover effects. The case and death numbers are, for example, significantly positively associated with early cases from the beginning of the epidemic, the average age, the population density and the share of people employed in elderly care. By contrast, they are significantly negatively associated with the share of schoolchildren and children in day care as well as physician density. In addition, significant spillover effects on the case numbers of neighbouring regions were identified for certain variables, with a different sign than the overall effects, giving rise to further future analyses of the regional mechanisms of action of COVID-19 infection. The results complement the knowledge about COVID-19 infection beyond the clinical risk factors discussed so far by a socio-economic perspective at the ecological level.     

Zip codes and spatial analysis: Problems and prospects

The use of zip codes for spatial, demographic, and socio-economic analysis is growing. As of August 2005, 193 articles were indexed by “zip code” in the Social Sciences Citation Index, while 386 were indexed in PubMed. All of these articles were published since 1989. While the treatment of zip codes as units of analysis varies widely in epidemiology, marketing, geography, and the socio-economic planning sciences, there are a number of common “errors” that could be avoided if analysts retained a better understanding of zip code characteristics. The purpose of this paper is to outline the problems and prospects of utilizing zip codes for spatial analysis. Issues associated with spatial contiguity, data aggregation, and boundary definitions are addressed. Results suggest that, although zip codes are not the most robust spatial units of analysis available, they retain a modest degree of utility for specialized applications. Recommendations for future research regarding zip codes and their use in socio-economic applications are offered.