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18. STRATEGIC INVESTMENT IN A LABOUR-MANAGED DUOPOLY

Author

Miyamoto, Yoshinari

Subjects
Elasticity (Economics) -- Analysis, Universities and colleges -- Analysis, Company investment, Business, Business, general, Business, international, Economics
Abstract

To authenticate to the full-text of this article, please visit this link: http://dx.doi.org/10.1111/j.1467-8586.2009.00321.x Byline: Yoshinari Miyamoto (*) Keywords: capital commitment; homothetic production technology; labour-managed firm; reaction functions Abstract: ABSTRACT Developing a Cournot two-stage game model with strategic capital interaction, we compare two different kinds of equilibrium in a labour-managed (LM) duopoly. An LM firm's reaction function is negatively sloped when capital and output are simultaneously determined, while the slope of its reaction function in the second stage changes in sign depending on the magnitude of its labour-expansion elasticity. Hence, whether the LM firms employ more capital and produce greater output at the equilibria in the two-stage game model than at the equilibria resulting from the simultaneous selection of capital and output depends on the magnitude of their labour-expansion elasticity. Author Affiliation: (*)Faculty of Economics, Osaka City University, Osaka, Japan Article note: Correspondence: Faculty of Economics, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan. Tel: +81-6-6605-2251; Fax: +81-6-6605-3066; Email: yoshinari_miyamoto@nifty.com. Previous versions of this paper were presented at the Annual Meeting of the Japanese Economic Association at Chuo University, and seminars at Osaka City University, the University of Warwick, Fudan University, Chonnam National University, the University of Tokyo and Okayama University. The author is grateful to S. Haruna, N.J. Ireland, S.-H. Lee, T. Nakajima, seminar participants and anonymous referees for their valuable comments. The usual disclaimer applies.

Published
2010

25. Analysis of electromagnetic response of 3-D dielectric fractals of menger sponge type

Author

Semouchkina, Elena, Miyamoto, Yoshinari, Kirihara, Soshu, Semouchkin, George, and Lanagan, Michael

Subjects
Ceramic materials -- Research, Ceramic materials -- Properties, Ceramics -- Research, Ceramics -- Properties, Time-domain analysis -- Usage, Finite element method -- Usage, Fractals -- Research, Electromagnetism -- Research, Business, Computers, Electronics, Electronics and electrical industries
Abstract

Experimental studies and finite-difference time-domain simulations of electromagnetic (EM) response of the second-stage Menger sponge dielectric structures have been performed with different types of excitation in order to gain deeper insight into the phenomenon of EM wave localization in these fractals. Analysis of simulated amplitude distributions of electric field oscillations in the Menger sponges has revealed bandgap-like effects caused by resonances in the front part of the structures, as well as formation of the full-wave resonance mode in the central cavity at the localization frequency. It is demonstrated that penetration of the waves inside the structure at the localization frequency leads to equalizing of the EM response from different parts of the 3-D fractal, however, no high-Q eigenmode is formed in the second-stage Menger sponge. Simulations of the modified fractal structures have been used to show the potential of formation of a bandgap with defect-related localized photon states by 3-D fractals. Index Terms--Ceramics, electromagnetic (EM) fields, finite-difference time-domain (FDTD) method, fractals, resonance.

Published
2007

46. Strategic outsourcing and quality choice: Is a vertical integration model sustainable?

Author

Miyamoto, Yoshinari

Subjects
VERTICAL integration, CONTRACTING out, RECESSIONS, PRODUCT differentiation
Abstract

This paper uses two versions of a vertical product differentiation model with price competition to investigate how strategic behavior between rival firms influences which organizational production mode each firm adopts: that is, either vertical integration or outsourcing. We show that not only a symmetric configuration, where both high‐ and low‐quality firms outsource, but also an asymmetric configuration, where the high‐quality firm produces in‐house whereas the low‐quality firm outsources, are acceptable as a subgame‐perfect equilibrium outcome. We explore the implications of these results in light of the recent slump in business of Japanese electronics enterprises in the flat‐panel television industry. [ABSTRACT FROM AUTHOR]

Published
2021
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50. Terahertz wave localization at a three-dimensional ceramic fractal cavity in photonic crystals.

Author

Miyamoto, Yoshinari, Kanaoka, Hideaki, and Kirihara, Soshu

Subjects
*INDUSTRIAL chemistry, *ELECTROMAGNETIC fields, *ELECTRIC fields, *ALUMINUM oxide, *RESONANCE
Abstract

A three-dimensional microphotonic crystal with diamond structure, in which a cube cavity of the stage 2 Menger sponge fractal is embedded, was designed in order to localize effectively terahertz waves. The crystal was fabricated from alumina ceramics by a computer aided design/computar aided manufacturing microstereolithography and sintering process. The localization frequency was in good agreement with both the simulated frequency determined by the transmission line modeling method and the calculated frequency by using the empirical equation. The simulated amplitude distribution of electric field oscillations showed that three different resonance modes exist in substructures of the sponge with each half wavelength oscillation. The wave leakage from the single sponge fractal was effectively blocked by the outer diamond structure. [ABSTRACT FROM AUTHOR]

Published
2008
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