Cost analysis of warranty policies

This article analyzes two general warranty policies involving an initial free replacement period, followed by a pro rata period. We examine the short-run total costs and longrun average costs under these policies. Formulas for both consumer costs and manufacturer profits under warranty are derived. We also study the expected number of purchases over the product life cycle under both policies. Bounds for the expected total costs and expected number of purchases are obtained for the case where the failure distribution of the item is new better than used.     

Building the Somali National Army: Anatomy of a failure, 2008–2018

ABSTRACT

Over a decade of security force assistance (SFA) initiatives to build an effective Somali National Army (SNA) failed because of the interrelated effects of political, contextual and operational challenges. The key political challenges were interest asymmetry between international actors and Somali elites, insufficient focus on institution-building and a lack of donor coordination. The principal contextual challenges in Somalia were the legacies of two decades of state collapse and the negative effects of clan dynamics. The main operational challenges were building an army while simultaneously fighting a war, the complexities of military integration, and the severe capability gaps afflicting the SNA.     

The Un-Holy Russo-Chinese alliance

ABSTRACT

This essay argues that a Sino-Russian alliance has come into being over many years of the two states’ evolutionary policies. Although Vladimir Putin has emphasised that this is a multi-faceted relationship, this essay focuses exclusively on its military dimension. It comprises extensive inter-ministerial and inter-governmental cooperation, arms sales, joint exercises, and shared political orientation. While it may not be a formal alliance like NATO research, e.g. by Alexander Korolev, indicates that in general experts argue that what they have achieved is even better than an alliance.