A Note on Minimax Mixture of Distributions Free Procedure for Inventory Model with Variable Lead Time

In recent papers, Moon and Choi (1998) and Hariga and Ben-Daya (1999)considered a continuous review inventory model with a mixture of backordersand lost sales in which the lead time, the order quantity, and the reorder pointare decision variables was studied. Moreover, they also develop a minimaxdistribution free procedure for the problem. While the demands of differentcustomers are not identical in the lead time, then we can't only use a singledistribution (such as Moon & Choi (1998) and Hariga & Ben-Daya (1999))to describe the demand of the lead time. Hence, we correct and extend the modelof Moon and Choi (1998) and Hariga and Ben-Daya (1999) by considering thelead time demand with the mixture of distributions. In addition, we also applythe minimax mixture of distributions free approach to the model by simultaneouslyoptimizing the order quantity, the reorder point, and the lead time to devise a practical procedure which can be used without specific information on demand distribution.     

Revealed preference and differentiable demand

Summary. We prove that, for finitely many demand observations, the Strong Axiom of Revealed Preference tests not only the existence of a strictly concave, strictly monotone and continuous utility generator, but also one that generates an infinitely differentiable demand function. Our results extend those of previous related results (Matzkin and Richter, 1991; Chiappori and Rochet, 1987), yielding differentiable demand functions but without requiring differentiable utility functions.Received: 1 November 2001, Revised: 5 February 2004, JEL Classification Numbers: D11, D12. Correspondence to: Kam-Chau WongThis is a much revised version of Lee and Wong (2001). We are grateful to the Referee for valuable suggestions. We also thank Professor Marcel K. Richter for his comments.     

Improving perishable product inventory management using goal programming

The multiple objectives of perishable product inventory management are examined in this paper. These objectives include: (1) satisfying demand by carrying sufficient inventories, (2) holding down inventory carrying costs, (3) keeping the amount of product spoilage (outdating) at an acceptable level, and (4) maintaining quality by using the product while it is still fresh, and (5) keeping the cost of rotation low. Some of the above objectives are in conflict. Thus, certain redistribution policies may help attain one or more of these objectives to a greater extent. Redistribution involves the transfer of the product from outlets where demand is low to outlets where demand is high. A goal programming model for solving redistribution problems is presented. An example is provided and sensitivity analysis is performed in order to determine when redistribution is advantageous. Applicability of the model is discussed.     

Who Gains from the Demographic Dividend? Forecasting Income by Age

Changes in the population age structure are known to influence the total income per person, but little is known about whether the changes are equally shared across the population or are concentrated on particular age groups and/or birth cohorts. The answer to this question has potentially important implications for income inequality, human capital investment, and fertility decision-making. We propose a new model of intergenerational transfers which distinguishes between the effects of changes in population structure and the effects of changes in family age structure. Using age-specific data from annual income and expenditure surveys of Taiwan between 1978 and 1998, we show that changes in age structure have had a very favorable effect on Taiwan's income growth. The gains are not equally shared by all age groups, however. Children and young adults have benefited the most, while the elderly have benefited the least. The population and family age structures have independent effects on per capita income; the effect of the population age structure is most important. Generational differences in per capita income are closely related to intergenerational differences in earnings, suggesting only a weak form of altruism. Finally, we predict that, on average, population aging will adversely influence the per capita income growth in Taiwan in the coming decades.     

Between Collapse and Survival in North Korea: an Economic Assessment of the Dilemma

The current North Korean reform focuses on an open door policy without much import liberalization and on a partial domestic liberalization limited to the consumer sector. This can be considered a variant of the so-called East Asian growth model pursued in South Korea, Taiwan, and China. Although the basic directions of such a model are understandable, the intensity of the reform measures is not radical and strong enough, and the economy has exhausted domestic resources to rely on and is having difficulty in getting access to external resources. Collaboration from the US and South Korea is the most critical elements for the success of North Korean strategy since these will lower political uncertainty and give the regime access to international capital and markets.They may have at most two or three years to rely on and try a big push from the outside, which can hopefully give the system a new momentum for recovery. Otherwise, collapse is certain since they do not have their own ability to revitalize the economy. Success or failure of the next three-year reform will determine the future of North Korea. Failure, including the sudden stop of the reform by internal coup, could lead to collapse of the North Korean regime (hard landing), which will bring in radical reforms either by a new North Korean leadership or by a South Korean takeover. Success could lead to a widening and deepening of reforms to deal with the main body of the domestic economic system (Chinese style soft landing), or alternatively give room for stop-go style (Romania or Cuba style) muddling through.     

Fourth annual conference on financial economics and accounting

Announcement

Fourth annual conference on financial economics and accounting     

The Importance of Social Capital to the Management of Multinational Enterprises: Relational Networks Among Asian and Western Firms

Social capital is an important concept for multinational firms. Firms operating in global markets rarely have adequate resources to compete effectively in global markets; they access the needed resources through formal and informal relationships with other firms. The cultures in Asian countries have emphasized relationships much more strongly than Western firms. Thus, relational capital, based on guanxi (China), kankei (Japan) and inmak (Korea), provides the framework for business dealings in many Asian countries. As a result, the social capital of many Asian firms gives them a potential competitive advantage in global markets. Western firms must develop social capital and learn to manage relational networks to gain and sustain a competitive advantage in global markets. Western firms can learn how to develop and manage social capital from Asian firms. Alternatively, social capital has some disadvantages. Firms are limited by their networks and thus experience opportunity costs and path dependence. Additionally, while Asian firms often have strong network ties in their domestic markets, they have to develop many more ties globally to operate effectively in global markets. As a result, the development and management of social capital has become of critical importance for competitive advantage in global markets.     

Unit initial public offerings: Staged equity or signaling mechanism?

We investigate the use of unit (i.e., package) initial public offerings by Australian industrial firms and conclude that their use reflects their role as a signaling mechanism (Chemmanur and Fulghieri, 1997), as distinct from the agency–cost explanation offered by Schultz (1993). From a sample of 394 IPOs between 1976 and 1994, the 66 firms making unit offerings are typically riskier, use less prestigious underwriters and have a lower level of retained ownership than other IPO firms. While these results are also consistent with Schultz's agency cost explanation, other results we report are not. We find no difference in underpricing etween unit IPOs and other IPO firms, nor are there any significant differences in the planned uses of proceeds reported in the prospectus, post–listing failure rates or secondary equity offerings of the type predicted by Schultz. We do however, report evidence consistent with a prediction unique to the signaling explanation. After controlling for the level of ownership retained by insiders, the proportion of firm value sold as warrants is increasing in IPO firms' riskiness.