the purpose of this article is to evaluate the pivotal irrigated wheat project by cost-benefit analysis method in order to find the internal rate of return and the ratio of present value of net benefits to costs.to this end, we have estimated the economic surplus created due to shift in wheat supply , as result ofimplementation ofthe project and have calculated the above criteria. we found that...

We design a field experiment to explore the use of social comparison to increase contributions to an online community. We find that, after receiving behavioral information about the median user’s total number of movie ratings, users below the median demonstrate a 530% increase in the number of monthly movie ratings, while those above the median do not necessarily decrease their ratings. When gi...

The creation of open agent-mediated electronic marketplaces requires new architectures, capable of coping with unreliable computational and network infrastructures, limited trust among independently developed agents, and the possibility of systemic failures. In analogy with civil human societies, open marketplaces will benefit from the introduction of appropriate electronic social institutions,...

in this study, the comparative advantage of main agricultural products and its relation to cropping pattern was studied in ilam province. for data analyzing the comparative advantage and government policies effects indices, policy analysis matrix (pam) were used. the obtained results for the comparative advantage indices of domestic resource cost (drc), social cost benefit (scb) and net social ...