Considering that security education needs to train students to deal with security problems in real environments, we developed new media for teaching applied cryptography and network security. They permit students to gain real-life security experience from virtual laboratories on CD, DVD, or online. The application of those media is helpful to reduce investment and administration costs as well a...

At this point, it is nearly impossible to escape discussion of the aging of the baby boom and its implications for Social Security. No set of reasonable demographic and economic assumptions yields a forecast of long-term solvency for the program as it exists today (Board of Trustees 1997; Congressional Budget Office (CBO) 1997). Some reform is necessary. The open questions are which reforms and...

Fostering Within-Family Human Capital Investment: An Intragenerational Insurance Perspective of Social Security We develop a general equilibrium stochastic OLG model with heterogenous households. Households differ with respect to their productivity. Productivity depends stochastically on parents' unobservable investment in their child's human capital and an aggregate productivity shock. We intr...

This paper incorporates human capital into the well-established portfolio theory by allowing for job security in personal portfolio choice. Our model predicts that young people hold more cash to hedge against risk associated with human capital (layoff risk). As people age, layoff risk decreases, and consequently, they invest in more risky assets – stocks in their portfolios. However, as people ...

Onion plays a crucial role in enhancing food security and generates income for the smallholder farmers of Ethiopia. This paper was attempted to analyze determinants onion supplied market Gemechis District, Oromia Region Data study were collected from both primary secondary sources. The data by household survey using pre-tested structured questionnaire key informant interview checklists. 176 far...

this study aimed at identifying critical factors affecting the security of iranian football stadiums and prioritizing them using the analytical hierarchy process (ahp) for future decisions. in the qualitative stage of the study, the main factors affecting the security of iranian football stadiums were identified in 12 semi-structured interviews with experts. in the quantitative stage, 17 expert...

As a consequence of optimal investment choices, a firm’s assets and growth options change in predictable ways. Using a dynamic model, we show that this imparts predictability to changes in a firm’s systematic risk, and its expected return. Simulations show that the model simultaneously reproduces: ~i! the time-series relation between the book-to-market ratio and asset returns; ~ii! the cross-se...

In this paper, we propose an evolutionary game model to analyze the investment decision making process in the cyber offender-defender interaction and provide a quantified approach for defender to calculate the safety threshold to avoid the occurrence of offender-leading game. Then we use simulation as a workbench to discuss the adjustment of each parameter to the security investment threshold. ...