Synergies and Investment Decisions

I examine optimal investment policies when there are synergies between two investment projects, in that joint operation reduces operating costs. These synergies interactions between two investments projects, therefore two investments decisions can't be determined separately. These interactions suggest that decisions of conglomerate firms may be rational.

From Duty to Right: The Role of Public Education in the Transition to Aging Societies

This paper argues that the introduction of compulsory schooling in early industrialization promoted the growth process that eventually led to a vicious cycle of population aging and negative pressure on education policy. In the early phases of industrialization, public education was undesirable for the young poor who relied on child labor. Compulsory schooling therefore discouraged childbirth, while the accompanying industrialization stimulated their demand for education. The subsequent rise in the share of the old population, however, limited government resources for education, placing heavier financial burdens on the young. This induced further fertility decline and population aging, and the resulting cycle may have delayed the growth of advanced economies in the last few decades.Compulsory Education; Fertility; Generational Conflict; Growth

From Duty to Right: The Role of Public Education in the Transition to Aging Societies,

This paper argues that currently advanced, aging economies experienced a qualitative change in the role of public education during the process of industrialization. In the early phases of the Industrial Revolution, public education was regarded as a duty that regulated child labor and thereby discouraged childbirth. As these economies developed and the population aged, younger generations came to view public education as a right, whereas older generations desirous of other public services became more politically in.uential. The eventual policy bias in favor of the elderly placed a heavier education burden on the young, inducing them to have fewer children. This vicious cycle between population aging and the undersupply of public education may have decelerated the growth of advanced economies in the last few decades.

Income Distribution and Macroeconomics Revisited: The Role of Fertility Adjustment

This paper develops a theory in which households prepare for future education by adjusting the number of children they intend to raise. Income inequality lowers output per worker only if the inequality is attributed in some part to unexpected disturbances after childbirth.

Structural Petrology of the Ôbokè Anticline in the Sambagawa Crystalline Schist Zone, Central Shikoku

The structural geometry of Sambagawa crystalline schists in the Ôbokè district is investigated by statistical analysis of the preferred orientation of structural elements such as bedding schistosity, cleavages, and lineations. The Ôbokè Anticline is an asymmetrical anti-form with various scales folds whose axes trend from N 85° E to N 85° W. The cleavages develop in harmonic relation to the folds. The quartz fabric of the sandstone schist is exa-mined. The deformed quartz grains suggest a probability that the mechanism of quartz orientation is explained by the fracture hypothesis.今村外治教授退官記念特集

From duty to right: The role of public education in the transition to aging societies

This paper argues that currently advanced, aging economies experienced a qualitative change in the role of public education during the process of industrialization. In the early phases of the Industrial Revolution, public education was regarded as a duty that regulated child labor and thereby discouraged childbirth. As these economies developed and the population aged, younger generations came to view public education as a right, whereas older generations desirous of other public services became more politically influential. The eventual policy bias in favor of the elderly placed a heavier education burden on the young, inducing them to have fewer children. This vicious cycle between population aging and the undersupply of public education may have decelerated the growth of advanced economies in the last few decades

Statistical modeling for analysis of malaria epidemic behavior at Ishigaki Island

It is necessary to consider a stochastic variability in modeling malaria epidemic behavior since the　malaria infection cycle essentially depends on stochastic elements. For this requirement, we need to construct an appropriate statistical model from available data in advance. In this report, we provide some statistical models for the analysis of malaria epidemic behavior at Ishigaki Island. These models can be used for recurrence of past malaria epidemic and prediction of future malaria epidemic at Ishigaki Island