THE VERY RAPID INCREASE OF JAPANESE TOURISTS ABROAD AND THE ROLE OF NATIONAL WEALTH

The strong performance of the Japanese economy, rising stock and land prices in Japan, as well as the strong yen, have prompted Japanese to travel abroad in ever increasing numbers in recent years. Despite several obstacles against growth, such as limited vacation time for employees of Japanese corporations, relatively expensive airline tickets, capacity limitations of international airports in Japan, booming resort development in Japan itself, and imposed constraints on Japanese direct investment abroad, Japanese travelers abroad, the majority of whom are tourists, increased from less than five million in 1985 to almost 10 million in 1989. The traditional demand function based on income and price may not explain all of the growth of Japanese overseas tourism, since some of the increase in Japanese travelers may stem from increases in expected future income based on increased wealth. This wealth effect hypothesis is tested using a log-linear regression model. It is found that wealth is a better predictor of overseas tourism levels than income. The effect of wealth increases on overseas tourism is also found to have a lag time of about one year. For this reason, it is proposed that the slowing in the Japanese economy this year will negatively impact Japanese overseas tourism next year.     

Tax policy in the presence of emigration

This paper investigates the relationship between utilitarianism and horizontal equity in models of income taxation in particular and self-selection in general. An example involving well-behaved individual preferences is constructed in which a maximization of a utilitarian social welfare function leads via income taxation to horizontal inequities. Sufficient conditions for utilitarianism to bring horizontal equity are derived. The results are applied to the question of whether income tax credits are an appropriate way to treat differences in family size.     

The regulations for indoor air pollution in Japan: a public health perspective

In recent years public health problems caused by indoor air pollution, known as ‘Sick Building Syndrome in housing’, or ‘Sick House Syndrome’ in Japan, have been drawing strong public concern. After conducting extensive exposure assessment, government authorities have taken effective measures to solve the problem. However, as a result of diversification and increase in quantities of industrial chemicals, existing regulations do not cover enough ranges of various potential hazardous chemicals. Hence, the regulations seek to be changed from hazard‐based regulation to a risk‐based one. Good indoor air quality (IAQ), which does not pose unacceptable health risks from all pollutants affecting indoor air, should be ensured for all public people. The objective of this study is to clarify the remaining issues to be solved urgently, related to the regulations to ensure a good IAQ. We reviewed enormous numbers of the existing governmental and industrial voluntary standards and/or guidelines, literature and documents concerning IAQ research in the past 40 years. Our results showed six subjects from those remaining issues. Based on these subjects we created a new scheme to control the IAQ; we especially regarded a comprehensive labeling system as one of the important strategies.     

Partnership-enhancement and stability in matching problems

In two-sided matching problems, we consider “natural” changes in preferences of agents in which only the rankings of current partners are enhanced. We introduce two desirable properties of matching rules under such rank-enhancements of partners. One property requires that an agent who becomes higher ranked by the original partner should not be punished. We show that this property cannot always be met if the matchings are required to be stable. However, if only one agent changes his preferences, the above requirement is compatible with stability, and moreover, envy-minimization in stable matchings can also be attained. The other property is a solidarity property, requiring that all of the “irrelevant” agents, whose preferences as well as whose original partners’ preferences are unchanged, should be affected in the same way; either all weakly better off or all worse off. We show that when matchings are required to be stable, this property does not always hold.     

ALTERNATIVE STRATEGIES OF A PUBLIC ENTERPRISE IN OLIGOPOLY REVISITED: AN EXTENSION TO STACKELBERG COMPETITION

This paper revisits De Fraja and Delbono (1989), which is the seminal paper on mixed oligopoly, in order to pay more attention to Stackelberg competition. First, we show that, even in Cournot competition, if the number of private firms is sufficiently small, privatization necessarily reduces social welfare. Second, we demonstrate that when a public firm is a Stackelberg leader before and after privatization, privatization necessarily reduces welfare irrespective of the number of private firms. Moreover, we show that even when a public firm remains a follower, privatization reduces welfare if the number of private firms is relatively small.     

Portfolio Insurance with Liquidity Risk

This paper studies a portfolio insurance problem with liquidity risk. We consider an investor who wants to maximize the expected growth rate of wealth in a low liquid market. The investor can trade assets only at random times and his wealth must not fall below a predetermined floor. We find the optimal expected growth rate and an optimal strategy. The optimal strategy is closely related with a traditional constant proportion portfolio insurance strategy. Also we show that the same strategy maximizes the growth rate almost surely. Further we study the floor effect on the growth rate.     

Public capital and patterns of growth in the presence of threshold externalities

This paper studies the relation between public capital accumulation and long-run economic growth. We emphasize three phenomena that may be accompanied by the presence of public capital: increasing returns, rivalry, and threshold externalities. We formulate a simple growth model that captures these features of public capital in a tractable manner. Assuming that investment for public capital financed by income taxation, we show that the threshold externalities may generate multiple equilibria, so that the pattern of growth and the realization of a specific steady-growth equilibrium are quite sensitive to the rate of income tax as well as to expectations of agents.     

Comparative analyses of fiscal sustainability of the budgetary policy rules

We construct a continuous-time overlapping generations model with an endogenous growth structure and consider fiscal sustainability under two fiscal rules: (i) the government fixes the budget deficit-to-GDP ratio and (ii) the government fixes the primary balance-to-GDP ratio. Under the constant budget deficit-to-GDP rule, fiscal sustainability is ensured when the initial public debt-to-GDP and budget deficit-to-GDP ratios are sufficiently small. Under the constant primary balance-to-GDP rule, it is difficult to ensure fiscal sustainability when the primary balance is in deficit or zero. However, fiscal sustainability is ensured when the primary balance is in surplus and the initial government debt-to-GDP ratio is sufficiently small.     

Choice via grouping procedures

In this paper, we consider a natural procedure of decision‐making, the grouping choice methods, which leads to a kind of bounded rational choice. In this procedure a decision‐maker first divides the set of available alternatives into some groups and in each group she chooses the best element (winner) for her preference relation. Then, among the winners in the first round, she selects the best one as her final choice. We characterize grouping choice methods in three different ways. First, we show that a choice function is a grouping choice method if and only if it is a rational shortlist method (Manzini and Mariotti 2007 ) in which the first rationale is transitive. Second, grouping choice methods are axiomatically characterized by means of a new axiom called elimination, in addition to two well‐known axioms, expansion and weak WARP (Manzini and Mariotti 2007 ). Third, grouping choice methods are also characterized by a weak version of path independence.