A Tradable Permit System in an Intertemporal Economy: A General Equilibrium Approach

The creation of an artificial market through a tradable permit system as a remedy against market failure is gaining popularity among analysts and policymakers. We show that in an intertemporal competitive economy, a tradable permit system may not achieve efficiency without setting appropriate permit interest rates (rewards for holding permits), and to find them, we must know in advance the path of efficient permit prices, which is difficult or impossible to obtain. We deal with this problem in two ways. First, we seek a special case in which the permit interest rates are given by a simple rule. Second, we propose a mechanism by which the permit interest rates are generated endogenously. The determinacy of an equilibrium under a tradable permit system is also examined.Auction; artificial market, tradable permit system, general equilibrium, permit interest rate, permit bank, indeterminacy

Non-pecuniary Value of Employment and Natural Resource Extinction

We assume that people value employment not only to earn income to satisfy their consumption needs but also as a means of community/social involvement that provides socio-psychological (non-pecuniary) benefits. We show that the latter incentive can encourage full employment harvesting resources and explain why poor resource-based communities may exhaust a natural resource in a finite time even if there is a sustainable path of resource consumption available. We show that communities could sustain their natural resources by using outside-the-community employment and economic diversification, but, to be effective, such policies must ensure that the outside wage rate and the initial capital stock are above certain minimum levels, which will be higher the longer these policies are delayed.Non-pecuniary effects, Employment value, Resource extinction, Sustainability

Non-pecuniary Value of Employment and Individual Labor Supply

Recognizing that people value employment not only to earn income to satisfy their consumption needs but also as a means of community involvement that provides socio-psychological (non-pecuniary) benefits, we show that once the non-pecuniary benefits of employment are incorporated in the standard individual’s utility function, then at very low income levels employment can be a source of utility, inducing individuals to supply labor to the extent possible. We also show the conditions under which a greater non-pecuniary effect of employment generates a larger individual labor supply.Non-pecuniary effects, Employment value, Labor supply

When is it Optimal to Exhaust a Resource in a Finite Time?

Exhaustion of a natural resource stock may be a rational choice for an individual and/or a community, even if a sustainable use for the resource is feasible and the resource users are farsighted and well informed on the ecosystem. We identify conditions under which it is optimal not to sustain resource use. These conditions concern the discounting of future benefits, instability of social system or ecosystem, nonconvexity of natural growth function, socio-psychological value of employment, and strategic interaction among resource users. The identification of these conditions can help design policies to prevent unsustainable patterns of resource use.Renewable resource management, Sustainability, Finite-time exhaustion, Optimal path, Policy implications

Non-pecuniary Work Incentive and Labor Supply

Recognizing that people value employment not only to earn income to satisfy their consumption needs, but also as a means to gain socio-psychological (nonpecuniary) benefits, we show that once nonpecuniary work incentives are incorporated into standard labor supply theory, (i) the wage rate under-estimates (over-estimates) the true value of nonwork/leisure time when work has nonpecuniary benefits (costs), (ii) nonpecuniary benefits can be a substitute for monetary wages as work incentives, (iii) at very low wage rates, work can become a net source of utility, and (iii) the shape of labor supply curve differs from standard theory. We also identify conditions under which a greater nonpecuniary work incentive generates a larger individual labor supply, and examine the effects of non-wage income on labor supply both for paid and voluntary work.Nonpecuniary incentives, Labor supply, Non-wage income, Voluntary work

Cytotoxicity of the Bacillus thuringiensis Crystal Protein against Mammalian Cells

The crystal proteins produced by Bacillus thuringiensis subsp, israelensis (Bti) and subsp. coreanensis A1519 strain were examined for the cytotoxicity against MOLT-4 and HeLa cells by MTT assay and LDH assay, The A1519 crystal proteins processed by proteinase K exhibited the specific cell-killing activity toward MOLT-4 with little damage to the cell membrane, On the other hand, the Bti crystal proteins processed by proteinase K caused the substantial damage to the cell membrane of both MOLT-4 and HeLa, leading to the cell lysis. The non-digested crystal proteins of both strains exhibited no cytotoxicity, These data suggested that while the Bti crystal proteins caused the colloid-osmotic swelling and cell lysis of MOLT-4 and HeLa, the proteinase K-digested A1519 crystal proteins induced the specific cell death of MOLT-4 through a mechanism other than that of Bti

Seen but not heard: Women's experiences of educational leadership in Solomon Islands secondary schools

This study is concerned with the representation of women in leadership positions in Solomon Islands. In particular, it explores the educational leadership experiences of women working in Solomon Islands' secondary schools. While much research to date has been carried out in the developed and developing countries, very little has been undertaken in Melanesian countries. As such, we know very little about women's experiences in educational leadership in Melanesia. Research data was gathered using qualitative methods. Specifically, interviews were conducted with eight women, five were deputy principals and three were Heads of Departments. All the participants were teaching in schools in an urban centre. Data gathered were analyzed using the thematic analysis approach. The data gathering was conducted in the Solomon Islands in October 2007. The key findings revealed a number of issues that impacted on the women's leadership in their respective schools. Findings include lack of self confidence, difficulties in balancing work and family, discriminatory attitudes and the influence of the cultural patriarchal norms on the attitudes towards women in leadership positions. Other key findings related to the nature of the organization, in this case, the school. This included a lack of initial preparatory and on - going professional development programmes and a lack of consultation in the decision making process. This study also found that while the women embraced the collaborative approach to leadership, the structural barriers through the hierarchical organization of the schools meant they could not lead the way they would like to

Early mortality (pre and post antiretroviral treatment) amongst children with HIV/AIDS enrolled in two programs in Cambodia

Mexico AIDS Conference 200