Peliosis of the spleen with intraperitoneal hemorrhage

We encountered a patient with steroidrelated peliosis of the spleen, a rare disease characterized by multiple blood-filled cavities in the splenic parenchyma, with spontaneous intraperitoneal hemorrhage. The ultrasonographic, computed tomographic, and angiographic images were compared with pathologic findings of the material obtained surgically.     

Methodological problems associated with research on unfair discrimination against racial minorities

Despite the passage of civil rights legislation, racial and ethnic minorities continue to experience unfair discrimination in the workplace. Therefore, considerable research in human resource management and social psychology has examined the factors thought to affect unfair discrimination in organizations [Cox, T. (1993). Cultural diversity in organizations: Theory, research, and practice. San Francisco: Berrett-Koehler]. Although research has focused on unfair discrimination, researchers have argued that the construct and external validity of the results have been adversely affected by methodological problems [e.g., Stone, E.F., Stone, D.L., & Dipboye, R.L. (1992). Stigmas in organizations: Race, handicaps, and physical unattractiveness. In Kelly, K. (Ed.). Issues, theory, and research in industrial and organizational psychology (pp. 385–457). Amsterdam: Elsevier]. Given this critique, the present paper (a) examines the degree to which recent research suffered from a number of methodological problems (e.g., obtrusive measures, non-representative samples, and demand characteristics), (b) identifies strategies for overcoming these problems, and (c) offers recommendations for advancing our understanding of unfair discrimination in organizational contexts.     

An Analysis of Sorting and Recycling of Household Waste: A neo‐Ricardian Approach

One of the most interesting but troublesome features of daily recycling is the mixture of different types of household waste and degradation of a recycled material caused by the mixture of different types of waste. This is often seen in recycling of materials such as used papers, plastics and so on. This paper analyses this aspect, and demonstrates how the formation of prices and activity levels is made in a long‐run growing economy, by means of a neo‐Ricardian type of production model. It is proved that a long‐run equilibrium exists under reasonable assumptions. It is also shown how the sorting rate of different types of waste affects the grade of recyclable resources as well as prices.     

Recycling and Landfilling in a Dynamic Sraffian Model: Application of the Corn–guano Model to a Waste Treatment problem

Landfill sites may be regarded as input for a waste treatment process. Considering landfill as an exhaustible resource, we apply a basic corn–guano model to a waste treatment problem. We show how dynamic substitution between landfilling and recycling occurs. Namely, in an early stage, landfill disposal is adopted as waste treatment and a recycling process is not activated. Once an economy faces exhaustion of landfill, a recycling process is activated as a backstop technology. We refer to the possibility that an economy may be unstable after exhaustion of landfill, even if it enjoys stable growth at the early stage.     

Does ownership of an end-of-life product affect design for environment?

Circulative use of resources is a crucial concept for a modern capitalist economy. Faced with peaking-out of material resources and shortage of landfill capacity in the long run, human beings are required to promote efficient reuse and recycling of end-of-life products (ELPs). One of the methods to advance efficient reuse and recycling is rental or lease of products. Product service is also a similar idea. All these imply, in some sense, a change of ownership of a product and an ELP; ownership of an ELP as well as a product belongs to producers instead of households. It is often said that such a change of ownership promotes design for environment (DfE) or eco-design, contributing to circulative use of resources. This paper examines whether ownership of an ELP affects DfE by means of à la Sraffian type of equilibrium model. I show that there are two routes to DfE, namely via a reduction of the amount of an ELP and enhancement of quality of a secondary material. I also show that DfE effects do not appear under certain conditions, even if the ownership of an ELP is transferred to producers.     

AN ENVIRONMENTAL RESTRICTION AND INCOME DISTRIBUTION IN A CAPITALIST ECONOMY

Let us consider a growing economy where capitalists organize production emitting pollutants. The government is supposed to issue emission rights in order to control the amount of emitted pollutants, while capitalists must control their emission of pollutants in accordance with the amount of emission rights they buy. It is assumed that workers are also allowed to purchase emission rights. We show that the conventional inverse relationship holds between the wage rate and the profit rate, and between per capita consumption and the growth rate in this economy. We also study how economic variables such as the wage rate and per capita consumption are affected by the workers' purchase of emission rights.     

NEGATIVE SURPLUS VALUE AND INFERIOR PROCESSES*

One of the most interesting results in value theory is that positive profits are consistent with negative surplus value. This result is obtained, using a two-commodity linear model with joint production. Since existence of an inferior process is always implied in a two-commodity model, the result has been supposed to be applicable to a limited type of technology. The purpose of this paper is to show that positive profits with negative surplus value do not necessarily imply the existence of such a process in higher dimensions. Although a different type of inferiority is implied, such a definition of inferiority is quite different from what is normally understood.     

On the replenishment policy when the market demand information is lagged

We consider a situation where the most up-to-date information on the market demand and the inventory levels is not available to a replenishment decision maker in a single echelon of a supply chain. The objective of the decision maker is to minimise the sum of the inventory and the production costs. An intuitively attractive strategy under this setting might be to reduce the information time lag as much as possible by utilising information technologies such as RFID. We call this strategy the Time lag Elimination Strategy (TES). However, this course of action requires investment in information systems and will incur a running cost. We propose an alternative strategy that has similar economic consequences as the TES strategy, but it does not require new information systems. We call this strategy the Controlling Dynamics Strategy (CDS). The benefit coming from CDS is quantified and is compared to that from TES. We also quantify the benefits gained from the combined use of these two strategies. A new ordering policy is introduced that is easy to implement without any forecasting systems and can reduce the production cost significantly.