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The Fundamental Law Of Highway Congestion Revisited: Evidence From National Expressways In Japan, Wen-Tai Hsu, Hongliang Zhang May 2014

The Fundamental Law Of Highway Congestion Revisited: Evidence From National Expressways In Japan, Wen-Tai Hsu, Hongliang Zhang

Research Collection School Of Economics

The fundamental law of highway congestion states that when congested, the travel speed on an expanded expressway reverts to its previous level before the capacity expansion. In this paper, we propose a theory that generalizes this statement and finds that if there exists a coverage effect, that is, the effect of longer road length on traffic conditional on capacity, then the new equilibrium travel speed could be lower than its previous level. Given the fundamental law, the theory predicts that the elasticity of traffic to road capacity is at least 1. We estimate this elasticity for national expressways in Japan …


How Does Childbirth Alter Intrahousehold Resource Allocation?: Evidence From Japan, Tomoki Fujii, Ryuichiro Ishikawa Jun 2013

How Does Childbirth Alter Intrahousehold Resource Allocation?: Evidence From Japan, Tomoki Fujii, Ryuichiro Ishikawa

Research Collection School Of Economics

Exploiting unique panel data that include direct measurements of resource allocation within households, we investigated the impact of childbirth on intrahousehold allocation for married Japanese couples. Based on a collective model of the household, we developed reduced-form and structural-form estimation equations that allow us to focus on private goods to track the changes in intrahousehold resource allocation. We found one additional child is associated with a reduction in the wife's private expenditure share by at least two percentage points. This may be because she substitutes more say in decisions on the children for her own private expenditure share.


Entropy-Based Analysis And Bioinformatics-Inspired Integration Of Global Economic Information Transfer, Jinkyu Kim, Gunn Kim, Sungbae An, Young-Kyun Kwon, Sungroh Yoon Jan 2013

Entropy-Based Analysis And Bioinformatics-Inspired Integration Of Global Economic Information Transfer, Jinkyu Kim, Gunn Kim, Sungbae An, Young-Kyun Kwon, Sungroh Yoon

Research Collection School Of Economics

The assessment of information transfer in the global economic network helps to understand the current environment and the outlook of an economy. Most approaches on global networks extract information transfer based mainly on a single variable. This paper establishes an entirely new bioinformatics-inspired approach to integrating information transfer derived from multiple variables and develops an international economic network accordingly. In the proposed methodology, we first construct the transfer entropies (TEs) between various intra- and inter-country pairs of economic time series variables, test their significances, and then use a weighted sum approach to aggregate information captured in each TE. Through a …


The More Kids, The Less Mom's Divvy: Impact Of Childbirth On Intrahousehold Resource Allocation, Tomoki Fujii, Ryuichiro Ishikawa Oct 2008

The More Kids, The Less Mom's Divvy: Impact Of Childbirth On Intrahousehold Resource Allocation, Tomoki Fujii, Ryuichiro Ishikawa

Research Collection School Of Economics

We investigate how the impact of childbirth on intrahousehold allocation for married Japanese couples. We developed reduced‐form and structural‐form specifications from a unified theoretical framework. Under a weak set of assumptions, we can focus on private goods to track the changes in intrahousehold resource allocation. Our estimation results show that that allocation of resources within household tend to move to the disadvantage of women after a childbirth. One additional child is associated with a reduction in the wife's private expenditure share. Our estimation results reject the income-pooling hypothesis, and show that women are more risk averse than men.


Potential For Floating Offshore Wind Energy In Japanese Waters, A. R. Henderson, R. Leutz, Tomoki Fujii May 2002

Potential For Floating Offshore Wind Energy In Japanese Waters, A. R. Henderson, R. Leutz, Tomoki Fujii

Research Collection School Of Economics

The prospects for large scale commercialisation of sea-bed-mounted offshore windfarms are currently excellent, with the existing small-scale prototype windfarms currently being joined by the first large-scale parks in the shallow seas off the Danish, German, Swedish, Dutch, Belgian, British and Irish coasts. However other countries, including Japan, have much more limited regions of the shallow waters suitable for such developments and hence other concepts will also need to be utilised if offshore wind energy is also to become a major source of energy there.