Finding environmentally important industry clusters: Multiway cut approach using nonnegative matrix factorization

This paper proposes an optimal combinatorial method for finding groups of industries with relatively large CO₂ emissions through industrial relations. Using an economic input–output table, we estimated a non-symmetric matrix describing how much CO₂ is emitted in producing the commodity of industry i, which was purchased to produce commodity of industry j, to meet the final demand for a specific commodity. A symmetric strength of relations matrix describing the CO₂ emissions associated with the industrial relations was further estimated using the non-symmetric matrix. The strength of relations matrix can be viewed as a representation of the supply-chain network of the final commodity. In this study, we estimated the strength of relations matrix associated with the final demand for automobiles and applied the multiway cut approach using nonnegative matrix factorization to the matrix in order to find environmentally important industry clusters in the Japanese automobile supply chain. According to our empirical results, the optimal number of industry clusters is 19, and 4 industry clusters are playing a key role in CO₂ emission reduction.     

Power-divergence-type measure of departure from diagonals-parameter symmetry for square contingency tables with ordered categories

For the analysis of square contingency tables with ordered categories, Goodman considered the diagonals-parameter symmetry (DPS) model. This paper proposes a measure to represent the degree of departure from the DPS model. The proposed measure is expressed by applying Read and Cressie’s power-divergence or Patil and Taillie’s diversity index. The measure would be useful for comparing the degree of departure from the DPS model in several tables. Examples are given.     

Supply Constraint from Earthquakes in Japan in Input–Output Analysis

Disasters often cause exogenous flow damage (i.e., the [hypothetical] difference in economic scale with and without a disaster in a certain period) to production (“supply constraint”). However, input-output (IO) analysis (IOA) cannot usually consider it, because the Leontief quantity model (LQM) assumes that production is endogenous; the Ghosh quantity model (GQM) is considered implausible; and the Leontief price model (LPM) and the Ghosh price model (GPM) assume that quantity is fixed. This study proposes to consider a supply constraint in the LPM, introducing the price elasticity of demand. This study uses the loss of social surplus (SS) as a damage estimation because production (sales) is less informative as a damage index than profit (margin); that is, production can be any amount if without considering profit, and it does not tell exactly how much profit is lost for each supplier (upstream sector) and buyer (downstream sector). As a model application, this study examines Japan's largest five earthquakes from 1995 to 2017 and the Great East Japan Earthquake (GEJE) in March 2011. The worst earthquake at the peak tends to increase price by 10–20% and decrease SS by 20–30%, when compared with the initial month's prices/production. The worst damage tends to last eight months at most, accumulating 0.5-month-production damage (i.e., the sum of [hypothetical] differences in SS with and without an earthquake [for eight months] is 50% of the initial month production). Meanwhile, the GEJE in the five prefectures had cumulatively, a 25-month-production damage until the temporal recovery at the 37th month.     

Continuation of Festivals and Community Resilience during COVID-19: The Case of Nagahama Hikiyama Festival in Shiga Prefecture,Japan

The COVID-19 pandemic has severely affected the way of life of communities in Japan. This study examines the pandemic's impact by focusing on a popular activity in Japanese townships: participation in traditional festivals with roots dating back to before the Edo period. These festivals display the social customs of each community and their prosperity from the past to the present. Residents participating in local festivals gain a deep understanding of their personal importance within the community. However, many communities were forced to cancel their festivals in 2020 because of the pandemic. In 2021, many communities attempted to reinstate their traditional festivals, and some of them resumed the festivities with infection control measures in place. This case study examines how people resumed festivals in their communities and the conditions needed for them to reengage with their traditions. Focusing on the Nagahama Hikiyama Festival in Shiga Prefecture, Japan, we demonstrate the resilience of traditional communities in Japan. This study analyzes the reasons for and process of reviving and subsequently implementing traditional festivals and clarifies the positive factors contributing to the resumption of festivals in local communities. It examines the sources of resilience that have been cultivated in these communities and explains how their social capital bridges the gaps between local governments, schools, and broadcasters.     

添加电荷转移复合物(CTC)的铁电性液晶器件(FLCD)的特性研究

在铁电性液晶(FLC)中添加电荷转移复合物(CTC)制成液晶盒,以测定光学响应特性,其结果与以往有所不同:在附加脉冲的后沿,可观测到反向双稳态。由于这种存储器是反向的,因此可维持存储率100%的良好特性,具有较高的对比度。本文报道了关于添加CTC的FLCD的EO特性最新成果,作者还就为何在FLC中添加CTC会产生反向双稳态的原因、验证试验的结果和反向双稳态模型等,阐明了自己的见解。     

Linking Wealth and Productivity of Natural Capital for 140 Countries Between 1990 and 2014

Social Indicators Research - This study explores the relationship between inclusive wealth, economic growth, and productivity of natural capital (including forestry, fishery, fossil energy reserves...     

The technical efficiency of the Japanese banks: Non-radial directional performance measurement with undesirable output

The paper analyses technical efficiency of the Japanese banks from 2000 to 2007. The estimation technique is based on the Russell directional distance function that takes into consideration not only desirable outputs but also an undesirable output that is represented by non-performing loans (NPLs). The results indicate that NPLs remain a significant burden as for banks' performance. We show that banks' inputs have to be utilised more efficiently, particularly labour and premises. We also argue that a further restructuring process is needed in the segment of Regional Banks. We conclude that the Japanese banking system is still far away from being fully consolidated and restructured.