introduction: the theory of value of children refers to the needs which children provide for their parents. considering the close relationship between the value orientation of people with the decisions in organizing life and forming a family, including having children, and according to decreased fertility rate in iran, the present study was performed with aim of intergenerational comparison of ...

the conventional theory of adverse selection is not supported by most of the empirical works. these studies conclude that low-risk individuals demand more insurance services than high-risks. they refer to this situation as advantageous selection theory. this theory states that loss ratio of insureds may be lower than the population loss ratio while the conventional theory of adverse selection c...

Selection effects include seemingly independent influences on, and choices in, conducting and reporting primary research that may bias a stock of knowledge. Such effects may arise from sociopolitical influences (research priority selection), researcher choices (methodology selection), peer review influences (publication selection), and metaanalyst choices (metadata sample selection). This paper...