We set up a model with on?the?job search in which firms infrequently post vacancies for workers occasionally apply. The nests the standard job ladder and stock?flow models as special cases, while remaining analytically tractable easy to estimate from panel data sets. parameters structurally estimated on US are significantly different either restrictions imposed by or model. Imposing these under...

Three experiments examined the role of reputation for alleviating the lemons problem in an online market, and produced the following findings. First, information asymmetry drives the experimental market into a lemons market. Second, reputation about other traders moderately alleviates the lemons problem. Third, the power of reputation as a solution to the problem of lemons is substantially redu...

physical characteristics of agricultural products are the most important parameters in the design of grading, conveying, processing and packaging systems. among these physical characteristics, volume, mass, projected area and center of gravity are the most important for sizing systems. in this study, the segmentation method was used to estimate lemon volume. a total of 50 randomly selected lemo...

The purposes of this study were to explore the relationships among family stress, social support and job stress in female married hospital nurses. Married female nurses had to face both paid hospital work and unpaid domestic work, and double workloads might lead to more stress of female married nurses. Most studies were limited to explore the correlations of job stresses caused from jobs only, ...

Consider rolling a die with k sides, labeled a1, a2, ..., and ak, respectively. Let P(aj) be the ‘probability’ that a particular side aj appears after rolling the die. Before attempting to calculate P(aj), it is necessary to clarify the meaning of the word ‘probability’. In other words, we must specify what the number P(aj) quantifies. In statistics, the concept of ‘probability’ is formally int...

Consider rolling a die with k sides, labeled a1, a2, ..., and ak, respectively. Let P(aj) be the ‘probability’ that a particular side aj appears after rolling the die. Before attempting to calculate P(aj), it is necessary to clarify the meaning of the word ‘probability’. In other words, we must specify what the number P(aj) quantifies. In statistics, the concept of ‘probability’ is formally int...

We report on the inclusion of a formal method into a design process in industry. Concretely, we suggest carrying out a verification step in railway interlocking design between programming the interlocking and testing this program. Safety still relies on testing, but the burden of guaranteeing completeness and correctness of the verfication is in this way greatly reduced. We present a complete m...