Abstract This study examines the monotonicity properties of expected revenue in a revenue management problem with respect to the consumers’ choice behavior and the market size. The consumer behavior is described by a general discrete choice model. The firm decides which subset of fare products to offer at each time period. An example shows that the usual stochastic order relation in consumers’ ...

based on a meta-theoretical analysis of voting, the present paper is an attempt to present a theoretical model encompassing all the possible aspects of voting in an election action system, proposing four sub-systems of voting as follows: economic voting, political voting, cultural voting and moral voting. having distinguished among these sub-systems, the writer describes the constitutive elemen...

petrochemical industries are potentially capable of impacts on environment due to the essence of the activities and producing waste water, pollutant emissions and hazardous wastes. this case study has considered the environmental adverse impacts of petrochemical industries on existing habitats in mahshahr economic special zone with respect to the regional significant biological diversity and ec...

background: sulfur compounds must be removed from petroleum because they contribute to environmental pollution. a strong alkaline solution such as caustic soda is used to remove these compounds. this spent caustic has high values for chemical oxygen demand (cod) concentration, ph and total sulfur. in this study, the regeneration and treatment methodology of sulfidic spent caustic was investigat...

this paper attempted to explore the expectation level of individuals to match themselves with the career offers and their awareness level to make the right decision in choosing right career in an economy of unemployment problems especially among the educated persons. this descriptive analytical research work is done on the basis of perceptions of students of different levels of education. the s...

background: inadequate attention to management and institutional reforms is an important barrier to achieving universal health coverage. skilled and motivated public health managers in adequate numbers are an important requirement to overcome this hurdle. however, what are the career choices of medical students? are they interested in community medicine and public health? to document the career...

“rational choice model” is one of the economics theories which developed into sociology, politics, and anthropology and was applied to understand and justify some phenomena.  according to this hypothesis, the basis of decision making is improvements, enjoyment and suffering disposal. people always do all necessary calculations in each and every decision making and then adopt a rational decision...

to improve the quality of the mcqs, a supervising feedback strategy between the examination constructors and the educational development office of the school of traditional medicine was performed to evaluate the content validity and designation of the course items of the phytotherapy exam for phd students of traditional pharmacy. the efforts resulted in a well-constructed examination.

conclusions it seems that considering to a high rate of unemployment of university graduates and available restrictions of employment in the public and private organizations, applicants tend to enter the dental field because of the reliable and independent income and high social status which can be considered as the most important influential factors for choosing this field of study. results re...