JiYoung Park

Accessibility and Residential Land Values: Some Tests with New Measures

Accessibility is a fundamental concept in theories of metropolitan spatial structure. Urban economic models explain urban structure as a function of access to jobs; accessibility is capitalised into land values, which in turn explain the population distribution. Studies of residential land values show that many factors contribute to the value of a given location: the characteristics of the housing unit, its location with respect to social and environmental amenities, as well as access to jobs, services and other economic opportunities. Empirical studies typically use job access as a proxy for more generalised access to economic activities. However, jobs represent many different activities, from retail shopping to heavy manufacturing, and the value of access to these activities may be positive or negative. In this paper, accessibility measures based on industry sectors have been developed, allowing the separating out of possible different effects. Their impacts are tested on residential land values using data from the Los Angeles region. A multilevel modelling approach is used in order to control for neighbourhood-level attributes common to multiple properties. It is found that the various access measures have different and significant effects on land values, but attributes of the dwelling unit, together with access to the coast, explain most of the variation. The multilevel model is confirmed; there is significant correlation among properties within the same neighbourhood.

Simulating the State-by-State Effects of Terrorist Attacks on Three Major US Ports: Applying NIEMO (National Interstate Economic Model)

This landmark book covers a range of issues concerning the consequences of terrorist attacks. Beginning with a discussion of new policies and strategies, it then delves into specific areas of concern, modeling a range of possible scenarios and ways to mitigate or pre-empt damages.

Estimating the State-by-State Economic Impacts of a Foot-and-Mouth Disease Attack

The agricultural sector is highly vulnerable to bioterrorism attacks with the potential for severe economic consequences. This article presents estimates of state-by-state total economic impacts of a hypothetical agroterrorism attack that uses foot-and-mouth disease (FMD) pathogens, which is one of the most contagious animal diseases and can be easily weaponized. The authors estimate the economic impacts across the U.S. states by applying the National Interstate Economic Model (NIEMO), a multiregional input output (MRIO) model. Total economic impacts range from

TransNIEMO: Economic Impact Analysis Using a Model of Consistent Interregional Economic and Network Equilibria

23 billion to

The Gulf Oil Spill and Economic Impacts: Extending the National Interstate Economic Model (NIEMO) to Account for Induced Impacts

34 billion. The overwhelming sources of the losses are due to domestic and international demand cuts. The results of this research highlight the point that the economic impacts are nationwide, regardless of the location of the attack because of large-scale export losses.

Evolution and variety in complex geographies and enterprise policies

We describe a model that integrates a multiregional input–output (I–O) model of the USA (for 50 States and the District of Columbia) with the national highway network. Inter-state commodity shipments are placed on a congestible highway network. Simulations of major choke-point disruptions redirect traffic which increases the costs of some shipments. Increased costs show up in higher prices which help to determine a new I–O equilibrium. We find economic and network equilibria that are consistent. The simulations show only moderate economic impacts. We ascribe this to the resilience of the highway network. The model provides State-level detail on who bears the costs of the disruptions.

Park design and children's active play: : a microscale spatial analysis of intensity of play in Olmsted's Delaware Park

Abstract There has been considerable controversy about the economic impacts of the federal Gulf deepwater oil drilling suspensions following the oil spill. In this study, we elaborate and apply the National Interstate Economic Model (NIEMO) to estimate direct, indirect and induced economic losses in each of the 50 states (and the District of Columbia). We simulate the effects of three separate, 6-month direct loss scenarios of media guestimates reported by several local sources. While the traditional NIEMO application only captured direct and indirect impacts, we developed a new module to estimate local induced impacts as well. This methodology could be applied to any similar scenario. Our model extension and application suggest a useful approach to tasks such as the one assigned to Gulf Coast Claims Facility administrator Kenneth Feinberg. The terror threat, as well as the possibility of other mishaps and natural disasters, suggests that this is always a serious possibility that these sorts of calculations will have to be made. Our innovation was to estimate the Type-II effects in the impacted states and to trace their trade effects through the NIEMO system with only minor methodological elaborations.

Innovative green economy, urban economic performance and urban environments: an empirical analysis of US cities

ABSTRACT This Special Issue showcases eight articles on the emergent idea of “entrepreneurial ecosystems”. As a subject it has begun to attract early attention because it professes to realise the fundamentally social processes of entrepreneurial practice as against the cartoon-like figure of the heroic entrepreneur much–beloved of those in entrepreneurial studies and policies of a more individualistic persuasion. Furthermore, it aims to assist development of coherence in the field of study occasioned by the great variety of forms and labels given to small and micro-businesses consequent on the erosion in scale and scope of many traditional large enterprises. A further introductory point to be made is that many of the articles on display originate in South Korea where the attenuation of large corporate actors, stagnating national growth rates and government support for entrepreneurship have been one response to the crisis. Hanjin is merely one of the recent casualties of the faltering of globalisation for the South Korean corporate sector, beneficiary of major port-related innovation investment in the past as the South Korea – China comparison paper reveals. Other papers anatomise “platform ecosystems” in ICT applications, green urban policies, clusters, creative industry and regional development. All of these impinge upon government support for entrepreneurial efforts to grow a more social economy and, indeed, economic sociology and geography of regional and national growth.

A foot-and-mouth epidemic

This paper offers a microscale exploration of the role of park design on the intensity of physical activity among youth. The actual, unstructured use of a park—specifically, Delaware Park, an Olmsted-designed park in Buffalo, New York—by ninety-four children was observed and analyzed objectively using geographic information systems, global positioning systems, and accelerometers. Data were analyzed at the scale of 25 ft x 25 ft cells overlaid as a grid on the entire park. Results from the regression analysis show that particular features of parks—especially complexity in landscape surfaces, proximity to sport facilities and playgrounds, and the availability of pedestrian trails—enable greater intensity of youth physical activity in a park.

Advances in Cybersecurity Design: An Integrated Framework to Quantify the Economic Impacts of Cyber-Terrorist Behavior

ABSTRACT Green-city innovation uses industrial and entrepreneurial ecosystems that can reduce environmental and ecological risks and achieve sustainable urban development without degrading urban environments. In a city, entrepreneurship ecosystems include start-ups and supporting networks of coordinating entities which contribute to economies of scale; however, these systems may make a city’s green environment worse, by contributing to air or water pollution. Even though there is a widely held perception of an adverse relationship between urban economic performance and urban environmental conditions, green-city development involving clean industries can be a way to attract employees without affecting urban environments negatively. However, there is a dearth of empirical studies that examine how such a green-related innovative entrepreneurial system could become a growth engine of cities. This paper examines whether a greener city can contribute to the economic prosperity of the city. A two-stage econometrics approach is the method applied, using data from 2000 and 2005. This paper contributes to the field by distinguishing concerns about urban environments in green cities from concerns about economic performances related to innovative and entrepreneurial ecosystems.