Using publicly available aggregate data at an online retailer, we study how consumers search for durable goods. Specifically, we investigate the search patterns when, as is common with durable products, the total set of options consumers can choose from is very large. To study search patterns, we propose to analyze our aggregate data by defining a product network, consisting of the products and...

We extend the family of multivariate generalized linear mixed models to include random effects that are generated by smooth densities. We consider two such families of densities, the so-called semi-nonparametric (SNP) and smooth nonparametric (SMNP) densities. Maximum likelihood estimation, under either the SNP or the SMNP densities, is carried out using a Monte Carlo EM algorithm. This algorit...

Due to the failure-prone and vulnerable structure of WSN nodes, understanding typical activity patterns nodes helps identify faulty malicious node activities, differentiate normal behaviors from abnormal behaviors. In this study, for we observe effects network load on energy consumption, packet throughput, latency parameters. We run simulations networks with a variable number sinks. found that ...

land- phone, like mobile, internet and fax is a communication device and has network externality effect. thus as the penetration coefficient increases, the network effect improves. the transmission of information via the word of mouth is the main source of enhancing the network externalities coefficient. in this article we have investigated the factors affecting the network externality coeffici...