nep-net New Economics Papers
on Network Economics
Issue of 2012‒07‒01
two papers chosen by
Yi-Nung Yang
Chung Yuan Christian University

  1. Social Capital, Network Effects and Savings in Rural Vietnam By Newman, Carol; Tarp, Finn; Van Den Broeck, Katleen
  2. Closed queueing networks under congestion: non-bottleneck independence and bottleneck convergence By Jonatha Anselmi; Bernardo D'Auria; Neil Walton

  1. By: Newman, Carol; Tarp, Finn; Van Den Broeck, Katleen
    Abstract: Information failures are a major barrier to formal financial saving in low income countries. Households in rural communities often lack the information necessary to set up formal deposit accounts or are uncertain about the returns to saving formally. In t
    Keywords: household savings, social capital, information failure, women.s unions, Vietnam
    Date: 2012
  2. By: Jonatha Anselmi; Bernardo D'Auria; Neil Walton
    Abstract: We analyze the behavior of closed product-form queueing networks when the number of customers grows to infinity and remains proportionate on each route (or class). First, we focus on the stationary behavior and prove the conjecture that the stationary distribution at non-bottleneck queues converges weakly to the stationary distribution of an ergodic, open product-form queueing network. This open network is obtained by replacing bottleneck queues with per-route Poissonian sources whose rates are determined by the solution of a strictly concave optimization problem. Then, we focus on the transient behavior of the network and use fluid limits to prove that the amount of fluid, or customers, on each route eventually concentrates on the bottleneck queues only, and that the long-term proportions of fluid in each route and in each queue solve the dual of the concave optimization problem that determines the throughputs of the previous open network.
    Keywords: Closed queueing networks, Product-form, Asymptotic independence, Fluid limit, Large population
    Date: 2012–06

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