Evaluation of the MEMM, Parameter Estimation and Option Pricing for Geometric Lévy Processes

In this paper, we shall propose a useful approach to evaluate concretely the MEMM (minimal entropy martingale measure) for the typical geometric Lévy processes such as compound Poisson, stable, VG (Variance Gamma), CGMY (Carr-Geman-Madan-Yor), NIG (Normal Inverse Gaussian), etc. In addition, we shall estimate the parameters of geometric Lévy processes and value the European call option and Asian call option using the Nikkei financial data.     

Sustainability or Ruin of a Common Resource Economy with Random Jump

We consider a common resource economy in which agents exploit the common resource, and use it to produce goods and consume the goods produced. Also the agents can invest in private and productive capital. The resource extracted from the common resource is non‐renewable and the common pool is under uncertainty in the sense that it could have a sudden increase or decrease in the course of extraction. In this model we shall explore the probability of sustainability or ruin of the economy. We compare and discuss the optimal extraction rules and the probabilities under cooperative and non‐cooperative regimes.     

Factors related to food safety culture among school food handlers in Tokyo,Japan: a qualitative study

The purpose of this research was to qualitatively explore factors influencing the food safety culture in school meal services from the perspective of school food handlers (i.e., cooks, dietitians). Six in-depth, semi-structured focus group interviews were conducted with of school food handlers (n = 32). Thematic analysis was used to extract meaning from the data. Findings demonstrated that the following multi-level factors influenced the food safety culture of school meal services: (1) individual; (2) organization; (3) environment; (4) management; and (5) management style. These factors may be useful for effectively and strategically improving the food safety culture for food handlers in school meal services.