Purpose ? To present a new Split System Model (SSM) that predicts the reliability of complex systems with multiple Preventive Maintenance (PM) actions in the long term. Design/methodology/approach - The SSM was developed using probability theory based on the concept of separating repaired and...

The objective of this paper is to provide an estimate of the elasticity of elephant poaching with respect to prices. Ivory being a storable commodity subjects its price to Hotelling’s no-arbitrage condition, hence allowing identification of the supply curve. The price of gold, one of many...

This paper analyzes the rise and demise of piracy off the coast of Somalia to highlight the interplay between public and private crime protection measures. Using unique data on attacks, hijacks, and ransoms, the authors estimate a structural model of Somali piracy to calculate the elasticity of...

How do microeconomic frictions and microeconomic heterogeneity affect macroeconomic dynamics? We revisit the recent claim in the literature that nonconvex capital adjustment costs do not matter for aggregate dynamics. We argue that the neutrality of fixed adjustment frictions in general...

This paper analyzes the rise and demise of piracy off the coast of Somalia to highlight the interplay between public and private crime protection measures. Using unique data on attacks, hijacks, and ransoms, the authors estimate a structural model of Somali piracy to calculate the elasticity of...

The promotion mechanism of human resource is the key factor for the performance of the organization, and, was more influencing when the organization was dominating an empire, such as the Song dynasty. However, there was little literature discussed the promotion mechanism beyond the written rules...

The objective of this paper is to provide an estimate of the elasticity of elephant poaching with respect to prices. Ivory being a storable commodity subjects its price to Hotelling's no-arbitrage condition, hence allowing identification of the supply curve. The price of gold, one of many...

In lower-income countries, the economic contractions that accompany lockdowns to contain the spread of COVID-19 can increase child mortality, counteracting the mortality reductions achieved by the lockdown. To formalize and quantify this effect, this paper builds a...