THE 2005 LAWRENCE R. KLEIN LECTURE: EMERGENT CLASS STRUCTURE*

This article presents a model of the emergent class structure, in which a society inhabited by inherently identical households may be endogenously split into the rich bourgeoisie and the poor proletariat. For some parameter values, the model has no steady state where all households remain equally wealthy. In this case, the model predicts emergent class structure or the rise of class societies. Even if every household starts with the same amount of wealth, the society will experience “symmetry‐breaking” and will be polarized into two classes in steady state, where the rich maintain a high level of wealth partly due to the presence of the poor, who have no choice but to work for the rich at a wage rate strictly lower than the “fair” value of labor. The nonexistence of the equal steady state means that a one‐shot redistribution of wealth would not be effective, as wealth inequality and the class structure would always reemerge. Thus, the class structure is an inevitable feature of capitalism. For other parameter values, on the other hand, the model has the unique steady state, which is characterized by perfect equality. In this case, the model predicts dissipating class structure or the fall of class societies. Even if the society starts with significant wealth inequality, labor demand by the rich employers pushes up the wage rate so much that workers will escape from the poverty and eventually catch up with the rich, eliminating wealth inequality and the class structure in the long run. In an extension, we introduce self‐employment, which not only provides the poor with an alternative to working for the rich, but also provides the rich with an alternative to investment that creates jobs. Due to this dual nature of self‐employment, the effects of self‐employment turn out to be quite subtle. Yet, within the present framework, it is possible to offer a complete characterization of the steady states even in the presence of self‐employment.     

Enhanced co-citation analysis using frameworks

The valuation of intangible assets, such as patents, has recently been considered an important technique for R&D strategies. This paper proposes a citation analysis as a method of valuation on patent clusters having patent networks. A citation analysis is a method that examines the value of a patent on the basis of the number of citations of references. In particular, a co-citation analysis is used for coupling patents as the patent cluster and valuating the patent cluster. While the co-citation analysis is of great interest as a method of valuation, this analysis has not been fully examined and does not define any framework for a technology transition and patent strategy. Therefore, in this paper, the conventional co-citation analysis for evaluating the patent clusters is enhanced and frameworks for the technology transition and patent strategy are proposed by analysing citation routes in a co-citation analysis.     

A piecewise linear model of credit traps and credit cycles: a complete characterization

We reconsider a regime-switching model of credit frictions which has been proposed in a general framework by Matsuyama for the case of Cobb–Douglas production functions. This results in a piecewise linear map with two discontinuity points and all three branches having the same slope. We offer a complete characterization of the bifurcation structure in the parameter space, as well as of the attracting sets and related basins of attraction in the phase space. We also discuss parameter regions associated with overshooting, leapfrogging, poverty traps, reversal of fortune and growth miracle, as well as cycles with any kind of switching between the expansionary and contractionary phases.     

Relationship between environmental performance and financial performance: an empirical analysis of japanese corporations

The hypotheses that a firm's environmental performance has a positive impact on its financial performance and vice versa are statistically supported by Japanese data. However, this tendency for two‐way positive interaction appears to be only a relatively recent phenomenon. The tendency for realizing the two‐way interaction is not limited to the top‐scoring firms in terms of both financial and environmental performance. On the contrary, this is also a trend that can be observed fairly generally. Obviously, when we consider only scores of those companies that published the relevant information in their environmental reports, and conduct the statistical causality test with such information as additional input to the pooled time‐series and cross‐section data of financial performance, the results become more strongly significant. From the recent experience of environmental policies in Japan, we infer that information‐based environmental policy measures are effective to encourage the ongoing transition toward a more sustainable market economy. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment.     

Endogenous Inequality

Does the market economy exacerbate inequality across households? In a capitalistic society, do the rich maintain a high level of wealth at the expense of the poor? Or would an accumulation of the wealth by the rich eventually trickle down to the poor and pull the latter out of poverty? This paper presents a theoretical framework, in which one can address these questions in a systematic way. The model focuses on the role of the credit market, which determines the joint evolution of the distribution of wealth and the interest rate. A complete characterization of the steady states is provided. Under some configurations of the parameter values, the model predicts an endogenous and permanent separation of the population into the rich and the poor, where the rich maintains a high level of wealth partially due to the presence of the poor. Under others, the model predicts the Kuznets curve, i.e. the wealth eventually trickles down from the rich to the poor, eliminating inequality in the long run.     

New Goods, Market Formations, and Pitfalls of System Design

The standard practice in economic theory is to assume that all the relevant variables (e.g., the space of all the goods of potential economic value) and all the relevant constraints are known to the policymaker or to the designer of an economic system. This often unstated assumption (or the belief implicitly embodied in it) inadvertently creates an illusion about our ability to design an economic system and control process of resource allocation. In this paper, a series of examples is developed to illustrate that this modeling approach has the danger of misdirecting our attention when evaluating alternative forms of an economic system. Some implications for reforms in the former socialist economies are also drawn. J. Japan. Int. Econ., December 1995, 9(4), pp. 376–402. Department of Economics, Northwestern University, Evanston, Illinois 60208; NBER; and TCER.     

FREEDOM AND ACHIEVEMENT OF WELL‐BEING AND ADAPTIVE DYNAMICS OF CAPABILITIES

Extending D'Agata (2007, Journal of Socio‐Economics, 36, pp. 177–90), we consider adaptive dynamics of capabilities. In terms of the two‐way evaluation of well‐being à la Sen, we show the existence of a distribution of goods equalizing well‐being freedom (achievement) of each individual, the total amount of goods being fixed. On the other hand, by means of counter examples, we exemplify that two closely related focal variables can move in reverse directions (goods vs. well‐being, or freedom vs. achievement). In a dynamic context, one's well‐being achievement may decrease even with an increase in goods available, while, ceteris paribus, his/her well‐being freedom increases.     

Growing through Cycles in an Infinitely Lived Agent Economy

This paper extends the analysis of K. Matsuyama (Econometrica67 (1999), 335–347) to the case of an infinitely lived representative agent economy. The economy grows endogenously through endogenous fluctuations, perpetually moving back and forth between two phases. In one phase, there is no innovation, the market structure is competitive, and the economy grows solely by capital accumulation. In the other phase, new goods are introduced and the market structure is monopolistic. In the long run, both investment and innovation grow at the same rate, but the economy alternates between the periods of high investment and the periods of higher innovation. Journal of Economic Literature Classification Numbers: E32, O11.     

Analyzing the innovation process for environmental performance improvement

This paper elaborates the concept of demand articulation in product innovation to analyze innovation for environmental improvement. A conceptual framework has been developed that allows analysis of social demand articulation, the process that stimulates firms toward environmental innovation. Knowledge and information flows that raise the technological capability and awareness level of firms and consumers for environmental improvement are discerned. Their indicators have been developed based on the number of research papers and newspaper articles on environmental issues, respectively. Statistically significant results have been obtained on the role of knowledge and information flows on environmental innovations. Use of the framework on case studies revealed knowledge and information flows on local air quality and global warming led to the development of high-efficiency, low-emission automobiles. In conclusion, social demand articulation is an effective process by which knowledge and information flows mobilize the requisites needed for a successful environmental innovation.     

Why Are There Rich and Poor Countries? Symmetry-Breaking in the World Economy

To explain cross-country differences in economic performance, the economics of coordination failures typically portrays each country in a closed economy model with multiple equilibria and then argues that the Poor countries are in equilibria inferior to those achieved by the Rich. This approach cannot tell us anything about the degree of inequality in the world economy. A more satisfactory approach would be to build a world economy model and show why it has to be separated into the Rich and the Poor regions, i.e., to demonstrate the coexistence of the Rich and Poor as an inevitable aspect of the world trading system. In the present model, the symmetry-breaking of the world economy into the Rich and the Poor occurs because international trade causes agglomeration of different economic activities in different regions of the world. International trade thus creates a kind of pecking order among nations, and as in a game of musical chairs, some countries must be excluded from being Rich.J. Japan. Int. Econ., December 1996,10(4), pp. 419–439. Department of Economics, Northwestern University, Evanston, Illinois 60208